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Totally Integrated Power

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SIVACON S8

Technical Planning Information · 10/2015

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The product/system described in this documentation may be operated only by personnel qualiﬁed for the speciﬁc

task in accordance with the relevant documentation, in particular its warning notices and safety instructions.

Qualiﬁed personnel are those who, based on their training and experience, are capable of identifying risks and

avoiding potential hazards when working with these products/systems.

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ambient conditions must be complied with. The information in the relevant documentation must be observed.

Disclaimer of Liability

We have reviewed the contents of this publication to ensure consistency with the hardware and software

described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the

information in this publication is reviewed regularly and any necessary corrections are included in subsequent

editions.

WARNING, death or severe personal injury may result if proper

precautions are not taken.

SIVACON S8 Planning Principles –

System-based power distribution

SIVACON S8 – System overview

Circuit-breaker design

Universal mounting design

In-line design, plug-in

Cubicles in fixed-mounted design

Reactive power compensation

Further planning notes

Conforming to standards and design-verified

Technical annex

Glossary and rated parameters

SIVACON S8

Technical Planning Information

1 System-based power distribution 4

2 SIVACON S8 – System overview 8

2.1 System conﬁguration and cubicle design 10

2.2 Corner cubicle 15

2.3 Main busbar, horizontal 16

2.4 Connection points for earthing and

short-circuit devices 17

2.5 Overview of mounting designs 18

3 Circuit-breaker design 22

3.1 Cubicles with one ACB (3WL) 24

3.2 Cubicles with up to three ACB (3WL) 29

3.3 Cubicles with one MCCB (3VL) 30

3.4 Cubicles for direct supply and direct

feeder 31

4 Universal mounting design 34

4.1 Fixed-mounted design with

compartment door 37

4.2 In-line switch-disconnectors with fuses

(3NJ62 / SASIL plus) 38

4.3 Withdrawable design 38

5 In-line design, plug-in 50

5.1 In-line switch-disconnectors 3NJ62

with fuses 51

5.2 In-line switch-disconnectors SASIL plus

with fuses 53

6 Cubicles in ﬁxed-mounted design 56

6.1 In-line design, ﬁxed-mounted 56

6.2 Fixed-mounted design with front cover 59

6.3 Cubicle for customized solutions 63

7 Reactive power compensation 66

7.1 Conﬁguration and calculation 68

7.2 Separately installed compensation cubicles 70

8 Further planning notes 72

8.1 Installation 72

8.2 Weights and power loss 76

8.3 Environmental conditions 77

9 Conforming to standards and

design-veriﬁed 80

9.1 The product standard

IEC 61439-2 80

9.2 Arc resistance 81

9.3 Seismic safety and seismic requirements 83

9.4 Declarations of conformity and certiﬁcates 85

10 Technical annex 92

10.1 Power supply systems according to their

type of connection to earth 92

10.2 Loads and dimensioning 95

10.3 Degrees of protection according to

IEC 60529 97

10.4 Forms of internal separation based on

IEC 61439-2 98

10.5 Operating currents of three-phase

asynchronous motors 99

10.6 Three-phase distribution transformers 100

11 Glossary and rated parameters 102

11.1 Terms and deﬁnitions 102

11.2 Rated parameters 104

11.3 Index of tables 106

11.4 Index of ﬁgures 108

Content

Chapter 1

System-based power

distribution

SIVACON S8 Planning Principles – System-based power distribution

SIMARIS planning tools

The SIMARIS planning tools by Siemens provide efficient

support for dimensioning electric power distribution sys-

tems and determine the devices and distribution boards

required for them.

• SIMARIS design for network calculation and dimensioning

• SIMARIS project for determining the space requirements

of distribution boards and the budget, and for generating

specifications (bills of quantities)

• SIMARIS curves for visualising characteristic tripping

curves, cut-off current and let-through energy curves.

Further information about TIP:

www.siemens.com/tip

Further information about SIMARIS:

www.siemens.com/simaris

When a power distribution concept is to be developed

which includes dimensioning of systems and devices, its

requirements and feasibility have to be matched by the end

user and the manufacturer. We have prepared this planning

manual for the SIVACON S8 low-voltage switchboard to

support you with this task. Three principles must be ob-

served for optimal power distribution:

• Safety - integrated

• Economic efficiency - right from the start

• Flexibility – through modularity

Comparable to a main artery, electric power supply consti-

tutes the basis for reliable and efficient functioning of all

electrically operated facilities. Electrical power distribution

requires integrated solutions. Totally Integrated Power (TIP)

is a synonym for integrated electrical power distribution

(Fig. 1/1) in industrial applications, infrastructure projects

and buildings.

1 System-based power distribution

PROFINET PROFIBUS ... Industrial Ethernet Modbus

≤ 110 kV

Process / Industrial automation Building automation

Consulting,

planning

OperationOrdering,

delivery

Engineering Service,

modernisation

Installation,

commissioning

Products, systems and solutions

Renewables

Automation

Power distribution

Operation

and

monitoring

Load

manage-

ment

Load

curves,

forecast

Generator

control

Switchboard

manage-

ment

Status

reporting/

Failure

managem.

Power

Quality

Cost

center,

protocols

Mainte-

nance

Energy automation

Storage

technology

Medium-voltage

switchgear and

circuit protection

Transformer Low-voltage switchboard

including circuit protection

and measuring systems

Low voltage

distribution

Fig. 1/1: Totally Integrated Power (TIP) as holistic approach to electric power distribution

SIVACON S8 Planning Principles – System-based power distribution

SIMARIS configuration tools

Configuring and dimensioning a low-voltage switchboard is

very complex. SIVACON S8 switchboards are configured by

experts, effectively supported by the SIMARIS configuration

tools during the stages of switchboard manufacture, opera-

tion and maintenance:

• SIMARIS configuration for tender drawing up, order

processing and manufacturing the SIVACON S8

switchboard

• SIMARIS control to efficiently create visualisation systems

for operating and monitoring the SIVACON S8

switchboard

Cost-efficient complete system

The SIVACON S8 low-voltage switchboard sets new stand-

ards worldwide as power distribution board (PDB) or motor

control center (MCC) for industrial applications or in infra-

structure projects (Fig. 1/2). The switchboard system up to

7,000 A for easy and integrated power distribution ensures

maximum personal safety and plant protection and pro-

vides many possibilities for use due to its optimal design. Its

modular construction allows the switchboard to be opti-

mally matched to any requirement when the whole plant is

designed. Maximum safety and modern design now com-

plement each other in an efficient switchboard.

Tested safety

SIVACON S8 is a synonym for safety at the highest level.

The low-voltage switchboard is a design-verified low-volt-

age switchgear and controlgear assembly in accordance

with IEC 61439-2. Design verification is performed by

testing. Its physical properties were verified in the test area

both for operating and fault situations. Maximum personal

safety is also ensured by a test verification under arcing

fault conditions in accordance with IEC/TR 61641.

Flexible solutions

The SIVACON S8 switchboard is the intelligent solution

which adapts itself to your requirements. The combination

of different mounting designs within one cubicle is unique.

The flexible, modular design allows functional units to be

easily replaced or added. All SIVACON S8 modules are

subject to a continuous innovation process and the com-

plete system always reflects the highest level of technical

progress.

Further information about SIVACON S8:

www.siemens.com/sivacon-s8

Fig. 1/2: SIVACON S8 for all areas of application

Motor control center

Power distribution from the power center to the main and subdistribution board

Chemical &

mineral oil industry

Power industry:

Power plants

and auxiliary systems

Capital goods industry:

Production-related systems

Infrastructure:

Building complexes

SIVACON S8 Planning Principles – System-based power distribution

Fig. 1/3: Use of SIVACON S8 in power distribution

M M M M

Power center

Main distribution

board

Subdistribution

boards

Motor

control

center (MCC)

Consumers load

Use

SIVACON S8 can be used at all application levels in the

low-voltage network (Fig. 1/3):

• Power center or secondary unit substation

• Main switchboard or main distribution board

• Subdistribution board, motor control center, distribution

board for installation devices or industrial use

Advantages of modular design

Every SIVACON S8 switchboard is manufactured of de-

mand-oriented, standardised, and series-produced mod-

ules. All modules are tested and of a high quality. Virtually

every requirement can be satisfied due to the manifold

module combination possibilities. Adaptations to new

performance requirements can easily and rapidly be imple-

mented by replacing or adding modules.

The advantages offered by this modular concept are clear:

• Verification of safety and quality for every switchboard

• Fulfilment of each and every requirement profile

combined with the high quality of series production

• Easy placement of repeat orders and short delivery time

Chapter 2

SIVACON S8 – System overview

2.1 System conﬁguration and

cubicle design 10

2.2 Corner cubicle 15

2.3 Main busbar, horizontal 16

2.4 Connection points for earthing and

short-circuit devices 17

2.5 Overview of mounting designs 18

8SIVACON S8 Planning Principles – SIVACON S8 – System overview

• Safety - integrated

• Economic efficiency - right from the start

• Flexibility – through modularity

The interaction of the components described below results

in an optimal low-voltage switchboard with advantages as

regards:

2 SIVACON S8 – System overview

Standards and approvals

Standards and regulations Power switchgear and controlgear assembly

(design veriﬁcation)

IEC 61439-2

DIN EN 61439-2-2

VDE 0660-600-2

Test of internal fault behaviour (internal arc) IEC/TR 61641

DIN EN 60439-1 Supplement 2

VDE 0660-500 Supplement 2

Induced vibrations IEC 60068-3-3

IEC 60068-2-6

IEC 60068-2-57

IEC 60980

KTA 2201.4

Uniform Building Code (UBC), Edition 1997 Vol. 2,

Ch. 19, Div. IV

Protection against electric shock EN 50274 (VDE 0660-514)

Approvals Europe

Russia, Belarus, Kasakhstan

China

CE marking and EC Declaration of Conformity

EAC

CCC

Det Norske Veritas

Lloyds Register of Shipping

DNV GL Type Approval Certiﬁcate

LR Type Approval Certiﬁcate

Shell conformity "DEP Shell"

Technical data

Installation conditions Indoor installation, ambient temperature in the

24-h mean

+ 35 °C

(-5 °C to + 40 °C)

Rated operating voltage (Ue) Main circuit Up to 690 V (rated frequency fn 50 Hz)

Dimensioning of creepage

distances and clearances

Rated impulse withstand voltage Uimp 8 kV

Rated

insulation voltage (Ui)

1,000 V

Degree of pollution 3

Main busbars, horizontal Rated current Up to 7,010 A

Rated peak withstand current (Ipk)Up to 330 kA

Rated short-time withstand current (Icw)Up to 150 kA, 1s

Rated device currents Circuit-breakers Up to 6,300 A

Cable feeders Up to 630 A

Motor feeders Up to 630 A

Internal separation IEC 61439-2 Form 1 to form 4

BS EN 61439-2 Up to form 4 type 7

IP degree of protection in accordance with IEC 60529 Ventilated up to IP43

Non-ventilated IP54

Mechanical strength IEC 62262 Up to IK10

Dimensions Height (without base) 2,000, 2,200 mm

Height of base (optional) 100, 200 mm

Cubicle width 200, 350, 400, 600, 800, 850, 1,000, 1,200, 1,400 mm

Depth (single-front) 500, 600, 800, 1,000, 1,200 mm

Tab. 2/1: Technical data, standards and approvals for the SIVACON S8 switchboard

SIVACON S8 Planning Principles – SIVACON S8 – System overview

Fig. 2/1: Cubicle design of SIVACON S8

1 11 18

2 12 19

3 13 20

4 14 21

Enclosure Busbars Internal separation

Roof plate Main busbar (L1... L3, N) – top Device compartment/busbar compartment

Rear panel Main busbar (L1... L3, N) – rear top Cubicle to cubicle

Design side panel Main busbar (L1... L3, N) – rear bottom Compartment to compartment

FrameMain busbar (PE) – bottom Cross-wiring compartment

Base cover

Vertical distribution busbar system (L1... L3, N)

device compartment

Base

Vertical distribution busbar (PE)

cable connection compartment

Ventilated base compartment cover

Vertical distribution busbar (N)

cable connection compartment

Ventilated cubicle door

Compartment door

Head room door

10 SIVACON S8 Planning Principles – SIVACON S8 – System overview

2.1 System conﬁguration and

cubicle design

When the system configuration is planned, the following

characteristics must be specified:

• Busbar position (top, rear top, rear bottom, or both rear

top and rear bottom)

• Single-front or double-front design

• Cable/busbar entry (from the top or bottom)

• Connection in cubicle (front or rear)

Tab. 2/2: Schematic overview of switchboard conﬁgurations for SIVACON S8

Busbar position

Top Rear

Top Bottom Top and bottom

Single-front / double-front design

Single front Double front

Side of connection

Operating panel

B B B B

B B BB

SIVACON S8 Planning Principles – SIVACON S8 – System overview

These characteristics depend on the type of installation

among other things:

• Stand-alone

• At the wall (only for single-front design)

• Back to back (only for single-front design)

These determinations allow to specify cubicle design in

more detail (Fig. 2/1, Tab. 2/2 and Tab. 2/3). Further infor-

mation about the switchboard installation can be found in

Chapter 8 “Further planning notes”.

Cable/busbar entry

From the bottom From the top

Connection in cubicle

Front Rear

Side of connection

Operating panel

12 SIVACON S8 Planning Principles – SIVACON S8 – System overview

Tab. 2/3: Cubicle types and busbar arrangement

Top busbar position

Busbar system Cubicle design

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Top

Up to 3,270 A

Bottom

Front

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Top

Up to 3,270 A

Top

Front or rear

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Top

Up to 6,300 A

Bottom

Front

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Top

Up to 6,300 A

Top

Front or rear

Busbar

compartment

Cable / busbar

connection

compartment

Cross-wiring

compartment

Operating

panels

Device/functional

compartment

N L3 L2 L1

500

800

N L3 L2 L1

800

N L3 L2 L1

800

N L3 L2 L1

800 400

1,200

SIVACON S8 Planning Principles – SIVACON S8 – System overview

Rear busbar position

Busbar system Cubicle design

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Rear

Top or bottom

Top and bottom

Up to 4,000 A

Bottom or top

Front

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Rear

Top or bottom

Up to 7,010 A

Bottom or top

Front

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Rear

Top or bottom

Top and bottom

Up to 6,300 A

Bottom or top

Front

Busbar position

Rated current

Cable/busbar entry

Connection in cubicle

Rear

Top or bottom

Up to 7,010 A

Bottom, top

Front

Busbar

compartment

Cable / busbar

connection

compartment

Cross-wiring

compartment

Operating

panels

Device/functional

compartment

600

800

1,000

1,200

14 SIVACON S8 Planning Principles – SIVACON S8 – System overview

Tab. 2/4: Cubicle dimensions

Fig. 2/2: Dimensions of enclosure parts

9 mm

25 mm

45 mm

Door

Side panel

with

design strip

Side panel

without

design strip

Rear panel

Depth

Width

Cubicle height

Frame 2,000, 2,200 mm

Base Without, 100, 200 mm

Cubicle width

Dependent of:

- Cubicle type

- Rated device current

- Connecting position and/or cable/busbar entry

Cubicle depth

Type

Main busbar Cubicle depth

Location Rated current Front connection Rear connection

Entry from the

bottom Entry from the top

Single front

Top 3,270 A 500, 800 mm 800 mm 800 mm

6,300 A 1) 800, 1,000 mm 1,200 mm 1,200 mm

Rear 4,000 A 600 mm 600 mm -

7,010 A 800 mm 800 mm -

Double front Rear 4,000 A 1,000 mm 1,000 mm -

7,010 A 1) 1,200 mm 1,200 mm -

1) Frame height 2,200 mm

Tab. 2/5: Surface treatment

The cubicle dimensions listed in Tab. 2/4 do not factor in

the enclosure parts and no outer built-on parts.

For the dimensions of the cubicles' enclosure parts, please

refer to Fig. 2/2. For degrees of protection IPX1 and IPX3,

additional ventilation roof panels are mounted on the

cubicle.

The dimensions of the enclosure parts are within the

required minimum clearances for erecting the switchboard.

Doors can be fitted so that they close in escape direction.

The door stop can easily be changed later. The door hinges

allow for a door opening angle of up to 180° in case of

single installation of a cubicle and at least 125° when

cubicles are lined up. For more details, please refer to

Chapter 8 “Further planning notes”. The condition of sur-

faces of structural and enclosure parts is described in

Tab. 2/5.

Surface treatment

Frame components Sendzimir-galvanised

Enclosure Sendzimir-galvanised / powder-coated

Doors Powder-coated

Copper bars

Bare copper,

optionally silver-plated,

optionally tin-plated

Colour

Powder-coated

components

(layer thickness 100 ± 25 μm)

RAL7035, light grey (in accordance

with DIN 43656) or upon request

Design components Blue Green Basic

SIVACON S8 Planning Principles – SIVACON S8 – System overview

2.2 Corner cubicle

The corner cubicle connects two segments, positioned at

right angles to each other, of a switchboard in single-board

design (Fig. 2/3). The corner cubicle contains as functional

rooms only the busbar compartment and the cross-wiring

compartment. These compartments cannot be accessed via

doors. The frame width resp. frame depth of the cubicles

are listed in Tab. 2/6.

Fig. 2/3: Integration of the corner cubicle

Operation panel

Corner cubicle

Tab. 2/6: Dimensions of the corner cubicles

Cubicle depth D Frame width / depth W

of the corner cubicle

500 mm 600 mm

600 mm 700 mm

800 mm 900 mm

1,200 mm 900 mm

16 SIVACON S8 Planning Principles – SIVACON S8 – System overview

2.3 Main busbar, horizontal

Tab. 2/7 lists the rating data for the two possibilities how to

position the main busbar – top or rear – (Fig. 2/4). Chapter

10 describes how ambient temperatures must be observed

in respect of the current carrying capacity.

Tab. 2/7: Rating of the main busbar

Fig. 2/4: Variable busbar position for SIVACON S8

Top busbar position

Rated current In at 35 °C ambient

temperature Rated short-time

withstand current

Icw (1 s)

Ventilated Non-ventilated

1,190 A 965 A 35 kA

1,630 A 1,310 A 50 kA

1,920 A 1,480 A 65 kA

2,470 A 1,870 A 85 kA

3,010 A 2,250 A 100 kA

3,270 A 2,450 A 100 kA

3,700 A 1) 3,000 A 1) 100 kA

4,660 A 1) 3,680 A 1) 100 kA

5,620 A 1) 4,360 A 1) 150 kA

6,300 A 1) 4,980 A 1) 150 kA

1) If circuit-breakers with a very high power loss are used, the

following correction factors must be applied:

3WL1350: 0.95

3WL1363: 0.88

Rear busbar position 1)

Rated current In at 35 °C ambient

temperature Rated short-time

withstand current

Icw (1 s)

Ventilated Non-ventilated

1,280 A 1,160 A 50 kA

1,630 A 1,400 A 65 kA

2,200 A 1,800 A 65 kA

2,520 A 2,010 A 85 kA

2,830 A 2,210 A 100 kA

3,170 A 2,490 A 100 kA

4,000 A 3,160 A 100 kA

4,910 A 2) 3,730 A 2) 100 kA

5,340 A 2) 4,080 A 2) 100 kA

5,780 A 2) 4,440 A 2) 100 kA

7,010 A 2) 5,440 A 2) 150 kA

1) When operating two systems per cubicle at the same time

(busbar position rear top and rear bottom),

a reduction factor has to be considered::

for ventilated boards: 0,94

for unventilated boards: 0,98

2) Busbar position rear top or rear bottom

SIVACON S8 Planning Principles – SIVACON S8 – System overview

The central earthing point can only be used in the

power supply system L1, L2, L3, PEN (insulated) + PE.

To implement the central earthing point (CEP) - with or

without a main earthing busbar (MEB) - a cubicle for

customized solutions is inserted (see Chapter 6.3 “Cubicle

for customized solutions”).

CEP design

The CEP is designed as a bridge between the separately

wired (insulated) PEN and the PE conductor of the switch-

board. Measuring current transformers can be mounted on

the bridge for residual current measurements. In order to

be able to remove the current transformer in case of a

defect, a second, parallel bridge is provided. This prevents

cancelling the protective measure due to a missing connec-

tion between the separately wired PEN and PE conductor.

A mounting plate in the cubicle is provided for placing the

residual-current monitors. The cubicle widths are given in

Tab. 2/8.

MEB design

In addition to the central earthing point, the MEB can

optionally be mounted as a horizontal bar. This connecting

bar is separately installed in the cubicle and rigidly con-

nected to the PE conductor. Depending on how the cable is

entered, the MEB is installed at the top or bottom of the

cubicle. The cubicle widths can be found in Tab. 2/8 and

information about the cable terminals can be found in

Tab. 2/9.

Tab. 2/8: Cubicle widths for earthing short-circuit points

2.4 Connection points for earthing

and short-circuit devices

Short-circuiting and earthing devices (SED)

For short-circuiting and earthing, short-circuiting and

earthing devices (SED) are available. For mounting the SED,

appropriate fastening points are fitted at the points to be

earthed. To accommodate the SED for the main busbar, a

cubicle for customized solutions is inserted (see Chapter

6.3 “Cubicle for customized solutions”). The cubicle widths

are given in Tab. 2/8.

Central earthing point (CEP) and main earthing busbar

(MEB)

When voltage sources, which are located far apart, are

earthed, for example secondary unit substation and

standby generator set, the separate earthing of their neu-

tral points results in compensating currents through foreign

conductive building structures. Undesired electro-magnetic

interference is created, caused by the building currents on

the one hand and the lack of summation current in the

respective cables on the other.

If the requirement is parallel operation of several voltage

sources and if building currents shall be reduced as far as

possible, the preferable technical solution is implementing

the central earthing point (CEP). In this case, the neutral

points of all voltage sources are connected to the system

protective conductor / system earth at a single point only.

The effect is that despite potential differences of the

neutral points, building currents cannot be formed any

more.

Tab. 2/9: Cable terminal for the main earthing busbar

Earthing and short-

circuit points Cubicle widths

Short-circuiting and

earthing devices (SED)

400 mm (200 mm as cubicle

extension)

Central earthing point

(CEP)

600 mm, 1,000 mm (200 mm as

cubicle extension)

Main earthing busbar

(MEB) 600 mm, 1,000 mm

Cubicle width Max. number of cables connectible with

cable lug DIN 46235 (screw)

600 mm 10 x 185 mm2 (M10) + 12 x 240 mm2 (M12) 1)

1,000 mm 20 x 185 mm2 (M10) + 22 x 240 mm2 (M12) 1)

1) 300 mm² cable lugs can be used with M12 screw,

but this cable lug does not comply with DIN 46235, although it is

supplied by some manufacturers.

18 SIVACON S8 Planning Principles – SIVACON S8 – System overview

2.5 Overview of mounting designs

Circuit-breaker design Universal mounting design In-line design, plug-in Fixed-mounted design In-line design,

ﬁxed-mounted Reactive power compensation

Mounting design Withdrawable design

Fixed mounted design

Withdrawable design

Fixed-mounted design with compartment doors

Plug-in design

Plug-in design Fixed-mounted design with front covers Fixed mounted design Fixed mounted design

Functions

Incoming unit

Outgoing unit

Coupler

Cable feeders

Motor feeders (MCC) Cable feeders Cable feeders Cable feeders Central compensation of reactive power

Rated current InUp to 6,300 A Up to 630 A Up to 630 A Up to 630 A Up to 630 A Non-choked up to 600 kvar

Choked up to 500 kvar

Connection type Front and rear side Front and rear side Front side Front side Front side Front side

Cubicle width 400, 600, 800, 1,000, 1,400 mm 600, 1,000, 1,200 mm 1,000, 1,200 mm 1,000, 1,200 mm 600, 800, 1,000 mm 800 mm

Internal separation Form 1, 2b, 3a, 4b, 4 type 7 (BS) Form 3b, 4a, 4b, 4 type 7 (BS) Form 3b, 4b Form 1, 2b, 3b, 4a, 4b Form 1, 2b Form 1, 2b

Busbar position Rear, top Rear, top Rear, top Rear, top Rear Rear, top, without

Tab. 2/10: Basic data of the different mounting designs

SIVACON S8 Planning Principles – SIVACON S8 – System overview

Circuit-breaker design Universal mounting design In-line design, plug-in Fixed-mounted design In-line design,

ﬁxed-mounted Reactive power compensation

Mounting design Withdrawable design

Fixed mounted design

Withdrawable design

Fixed-mounted design with compartment doors

Plug-in design

Plug-in design Fixed-mounted design with front covers Fixed mounted design Fixed mounted design

Functions

Incoming unit

Outgoing unit

Coupler

Cable feeders

Motor feeders (MCC) Cable feeders Cable feeders Cable feeders Central compensation of reactive power

Rated current InUp to 6,300 A Up to 630 A Up to 630 A Up to 630 A Up to 630 A Non-choked up to 600 kvar

Choked up to 500 kvar

Connection type Front and rear side Front and rear side Front side Front side Front side Front side

Cubicle width 400, 600, 800, 1,000, 1,400 mm 600, 1,000, 1,200 mm 1,000, 1,200 mm 1,000, 1,200 mm 600, 800, 1,000 mm 800 mm

Internal separation Form 1, 2b, 3a, 4b, 4 type 7 (BS) Form 3b, 4a, 4b, 4 type 7 (BS) Form 3b, 4b Form 1, 2b, 3b, 4a, 4b Form 1, 2b Form 1, 2b

Busbar position Rear, top Rear, top Rear, top Rear, top Rear Rear, top, without

20 SIVACON S8 Planning Principles – SIVACON S8 – System overview

Chapter 3

Circuit-breaker design

3.1 Cubicles with one ACB (3WL) 24

3.2 Cubicles with up to three ACB (3WL) 29

3.3 Cubicles with one MCCB (3VL) 30

3.4 Cubicles for direct supply and

direct feeder 31

22 SIVACON S8 Planning Principles – Circuit-breaker design

The cubicle dimensions are tailored to the circuit-breaker

sizes and can be selected according to the individual re-

quirements. The circuit-breaker design provides optimal

connect conditions for every nominal current range. In

addition to cable connections, the system also provides

design-verified connections to SIVACON 8PS busbar trunk-

ing systems.

The cubicles for 3W. and 3V. circuit-breakers ensure both

personal safety and long-term operational safety (Fig. 3/1).

The incoming, outgoing and coupling units in cir-

cuit-breaker design are equipped with 3W. air circuit-break-

ers (ACB) in withdrawable or fixed-mounted design or

alternatively with 3V. moulded-case circuit-breakers (MCCB)

(Tab. 3/1).

3 Circuit-breaker design

Fig. 3/1: Cubicles in circuit-breaker design

SIVACON S8 Planning Principles – Circuit-breaker design

Tab. 3/1: General cubicle characteristics in circuit-breaker design

Application

range

- Incoming circuit-breakers

- Coupling circuit-breakers (longitudinal and transverse couplers)

- Outgoing circuit-breakers

- Direct incoming/outgoing feeders (without circuit-breakers)

Degrees of protection - Up to IP43 Ventilated

- IP54 Non-ventilated

Form of internal separation - Form 1, 2b Door cubicle high

- Form 3a, 4b 1) Door divided in 3 parts

Design options - Air circuit-breaker (ACB) in ﬁxed-mounted or withdrawable design 2)

- Moulded-case circuit-breaker (MCCB) in ﬁxed-mounted design 3)

1) Also form 4b type 7 in acc. with BS EN 61439-2 possible

2) Information about 3WT circuit-breakers is available from your Siemens contact

3) Information about moulded-case circuit-breakers in plug-in/withdrawable design is available from your Siemens contact

The circuit-breaker cubicles allow the installation of a

current transformer (L1, L2 and L3) at the customer con-

nection side. Information about the installation of addi-

tional transformers is available from your Siemens contact.

Cubicle with forced cooling

The circuit-breaker cubicles with forced cooling are

equipped with fans (Fig. 3/2). Controlled fans are installed

in the cubicle front below the circuit-breaker. The forced

cooling makes for an increase of the rated current of the

circuit-breaker cubicle. The other cubicle characteristics are

identical to the cubicle without forced cooling.

The fan control comes completely configured. No further

settings are required upon start-up of the switchboard. The

fans are dimensioned such that the required cooling is still

ensured if a fan fails. Failure of the fan or non-permissible

temperature rises are signalled. Forced cooling is available

for selected ACB (3WL) in withdrawable design.

The use of fans brings about additional noise emission.

Under normal operating conditions, the noise emission

may be 85 dB at the maximum. Higher noise emissions

only occur in the case of a fault.

Observing local regulations on noise protection and occu-

pational safety and health is mandatory. Rating data for

cubicles with forced cooling is available from your

Siemens contact.

Fig. 3/2: Forced cooling in a circuit-breaker cubicle

24 SIVACON S8 Planning Principles – Circuit-breaker design

3.1 Cubicles with one ACB (3WL)

The widths for the different cubicle types are listed by ACB

type in Tab. 3/2 to Tab. 3/4.

Tab. 3/2: Cubicle dimensions for top busbar position

Cubicle type ACB type

Nominal

device

current

Cubicle width in mm

Incoming / outgoing unit Cable connection Busbar connection

3-pole 4-pole 3-pole 4-pole

Top busbar position,

cable / busbar entry from the

top or bottom

3WL1106 630 A 400/600 600 - -

3WL1108 800 A 400/600 600 - -

3WL1110 1,000 A 400/600 600 - -

3WL1112 1,250 A 400/600 600 - -

3WL1116 1,600 A 400/600 600 400/600 600

3WL1120 2,000 A 400/600 600 400/600 600

3WL1220 2,000 A 600/800 800 600/800 800

3WL1225 2,500 A 600/800 800 600/800 800

3WL1232 3,200 A 600/800 800 600/800 800

3WL1340 4,000 A 2) 800 1,000 800 1,000

3WL1350 1) 5,000 A 2) - - 1,000 1,000

The position of the connecting bars is identical for cable entry

from the top or bottom 3WL1363 1) 6,300 A 2) - - 1,000 1,000

Longitudinal coupler 3-pole 4-pole

Top busbar position

3WL1106 630 A 600 800 - -

3WL1108 800 A 600 800 - -

3WL1110 1,000 A 600 800 - -

3WL1112 1,250 A 600 800 - -

3WL1116 1,600 A 600 800 - -

3WL1120 2,000 A 600 800 - -

3WL1220 2,000 A 800 1,000 - -

3WL1225 2,500 A 800 1,000 - -

3WL1232 3,200 A 800 1,000 - -

3WL1340 4,000 A 2) 1,000 1,200 - -

3WL1350 1) 5,000 A 2) 1,200 1,200 - -

3WL1363 1) 6,300 A 2) 1,200 1,200 - -

1) Withdrawable design, frame height 2,200 mm

2) Main busbar up to 6,300 A

SIVACON S8 Planning Principles – Circuit-breaker design

Cubicle type ACB type

Nominal

device

current

Cubicle width in mm

Incoming / outgoing unit Cable connection Busbar connection

3-pole 4-pole 3-pole 4-pole

1 busbar system in the cubicle:

rear top busbar position and

cable / busbar entry from the

bottom

rear bottom busbar position

and

cable / busbar entry from the

top

3WL1106 630 A 400/600 600 - -

3WL1108 800 A 400/600 600 - -

3WL1110 1,000 A 400/600 600 - -

3WL1112 1,250 A 400/600 600 - -

3WL1116 1,600 A 400/600 600 400/600 600

3WL1120 2,000 A 400/600 600 400/600 600

3WL1220 2,000 A 600/800 800 600/800 800

3WL1225 2,500 A 600/800 800 600/800 800

3WL1232 3,200 A 600/800 800 600/800 800

3WL1340 4,000 A 1,000 1,000

8001)/1,000

1,000

3WL1350 1) 5,000 A 2) - - 1,000 1,000

3WL1363 1) 6,300 A 2) - - 1,000 1,000

1 busbar system in the cubicle:

rear bottom busbar position

and

cable / busbar entry from the

bottom

rear top busbar position and

cable / busbar entry from the

top

3WL1106 630 A 400/600 600 - -

3WL1108 800 A 400/600 600 - -

3WL1110 1,000 A 400/600 600 - -

3WL1112 1,250 A 400/600 600 - -

3WL1116 1,600 A 400/600 600 400/600 600

3WL1120 2,000 A 400/600 600 400/600 600

3WL1220 2,000 A 600/800 800 600/800 800

3WL1225 2,500 A 600/800 800 600/800 800

3WL1232 3,200 A 600/800 800 600/800 800

3WL1340 4,000 A - -

8003)/1,000

1,000

Longitudinal coupler 3-pole 4-pole

1 busbar system in the cubicle:

rear top busbar position

rear bottom busbar position

3WL1106 630 A 600 600 - -

3WL1108 800 A 600 600 - -

3WL1110 1,000 A 600 600 - -

3WL1112 1,250 A 600 600 - -

3WL1116 1,600 A 600 600 - -

3WL1120 2,000 A 600 600 - -

3WL1220 2,000 A 800 800 - -

3WL1225 2,500 A 800 1,000 - -

3WL1232 3,200 A 800 1,400 - -

3WL1340 4,000 A 1,000 1,000 - -

3WL1350 1) 5,000 A 2) 1,400 1,400 - -

3WL1363 1) 6,300 A 2) 1,400 1,400 - -

1) Withdrawable design, frame height 2,200 mm

2) Main busbar up to 7,010 A

3) Frame height 2,200 mm

Tab. 3/3: Cubicle dimensions for rear busbar position

26 SIVACON S8 Planning Principles – Circuit-breaker design

Tab. 3/4: Cubicle dimensions for rear busbar position with two busbar systems in the cubicle

Cubicle type ACB type

Nominal

device

current

Cubicle width in mm

Incoming / outgoing unit Cable connection Busbar connection

3-pole 4-pole 3-pole 4-pole

2 busbar systems in the

cubicle:

rear top busbar position and

cable / busbar entry from the

bottom

rear bottom busbar position

and

cable / busbar entry from the

top

3WL1106 630 A 400/600 600 - -

3WL1108 800 A 400/600 600 - -

3WL1110 1,000 A 400/600 600 - -

3WL1112 1,250 A 400/600 600 - -

3WL1116 1,600 A 400/600 600 400/600 600

3WL1120 2,000 A 400/600 600 400/600 600

3WL1220 2,000 A 600/800 800 600/800 800

3WL1225 2,500 A 600/800 800 600/800 800

3WL1232 3,200 A 600/800 800 600/800 800

3WL1340 4,000 A 1,000 1,000

8001)/1,000

1,000

2 busbar systems in the

cubicle:

rear bottom busbar position

and

cable / busbar entry from the

bottom

rear top busbar position and

cable / busbar entry from the

top

3WL1106 630 A 400/600 600 - -

3WL1108 800 A 400/600 600 - -

3WL1110 1,000 A 400/600 600 - -

3WL1112 1,250 A 400/600 600 - -

3WL1116 1,600 A 400/600 600 400/600 600

3WL1120 2,000 A 400/600 600 400/600 600

3WL1220 2,000 A 600/800 800 600/800 800

3WL1225 2,500 A 600/800 800 600/800 800

3WL1232 3,200 A 600/800 800 600/800 800

3WL1340 4,000 A - -

8001)/1,000

1,000

Longitudinal coupler 3-pole 4-pole

2 busbar systems in the

cubicle:

rear top busbar position

rear bottom busbar position

3WL1106 630 A 600 600 - -

3WL1108 800 A 600 600 - -

3WL1110 1,000 A 600 600 - -

3WL1112 1,250 A 600 600 - -

3WL1116 1,600 A 600 600 - -

3WL1120 2,000 A 600 600 - -

3WL1220 2,000 A 800 800 - -

3WL1225 2,500 A 800 800 - -

3WL1232 3,200 A 800 800 - -

3WL1340 4,000 A 1,000 1,000 - -

Transverse coupler 3-pole 4-pole

2 busbar systems in the

cubicle:

rear top busbar position

and

rear bottom busbar position

3WL1106 630 A 400/600 600 - -

3WL1108 800 A 400/600 600 - -

3WL1110 1,000 A 400/600 600 - -

3WL1112 1,250 A 400/600 600 - -

3WL1116 1,600 A 400/600 600 - -

3WL1120 2,000 A 400/600 600 - -

3WL1220 2,000 A 600/800 800 - -

3WL1225 2,500 A 600/800 800 - -

3WL1232 3,200 A 600/800 800 - -

3WL1340 4,000 A 1,000 1,000 - -

1) Frame height 2,200 mm

SIVACON S8 Planning Principles – Circuit-breaker design

Cable and busbar connection

The number of connectible cables, as stated in Tab. 3/5,

may be restricted by the available roof/floor panel openings

and/or door installations. The position of the connecting

bars is identical for front or rear connection in the cubicle.

Connection to the SIVACON 8PS busbar trunking system is

effected by means of an installed busbar trunking connec-

tor. The SIVACON S8 connecting system is located com-

pletely within the cubicle. The busbars can be connected

both from the top and from the bottom, thus allowing

flexible connection. The factory-provided copper plating

guarantees high short-circuit strength, which is verified by

a design test, as is the temperature rise limits.

Short-circuiting and earthing device (SED)

For short-circuiting and earthing, short-circuiting and

earthing devices (SED) are available for the circuit-breaker

cubicle. Suitable mounting points are affixed to the points

to be earthed, which ease SED installation.

Tab. 3/5: Cable connection for cubicles with 3WL

Cable lug DIN 46235

(240 mm2, M12) 1)

Max. number of cables connectible per phase

dependent on breaker size

3WL11

up to 1,000 A

3WL11

1,250 to 2,000 A

3WL12

up to 1,600 A

3WL12

2,000 to 3,200 A

3WL13 2)

up to 4,000 A

4 6 6 12 14

1) It is possible to use 300 mm2 cable lugs with a M12 screw, but this cable lug is not in compliance with DIN 46235, although it is supplied by

some manufacturers

2) 5,000 A and 6,300 A circuit-breakers with busbar connection

28 SIVACON S8 Planning Principles – Circuit-breaker design

ACB type

Nominal

device

current

Rated current at 35 °C ambient temperature

Top busbar position Rear busbar position

Cable connection Cable entry from the bottom Cable entry from the top

Non-ventilated Ventilated Non-ventilated Ventilated Non-ventilated Ventilated

3WL1106 630 A 630 A 630 A 630 A 630 A 630 A 630 A

3WL1108 800 A 800 A 800 A 800 A 800 A 800 A 800 A

3WL1110 1,000 A 930 A 1,000 A 1,000 A 1,000 A 1,000 A 1,000 A

3WL1112 1,250 A 1,160 A 1,250 A 1,170 A 1,250 A 1,020 A 1,190 A

3WL1116 1,600 A 1,200 A 1,500 A 1,410 A 1,600 A 1,200 A 1,360 A

3WL1120 2,000 A 1,550 A 1,780 A 1,500 A 1,840 A 1,480 A 1,710 A

3WL1220 2,000 A 1,630 A 2,000 A 1,630 A 1,920 A 1,880 A 2,000 A

3WL1225 2,500 A 1,960 A 2,360 A 1,950 A 2,320 A 1,830 A 2,380 A

3WL1232 3,200 A 2,240 A 2,680 A 2,470 A 2,920 A 1,990 A 2,480 A

3WL1340 4,000 A 2,600 A 3,660 A 2,700 A 3,700 A 2,430 A 3,040 A

ACB type

Nominal

device

current

Top busbar position

Busbar entry from the bottom,

SIVACON 8PS system LD or LX

Busbar entry from the top,

SIVACON 8PS system LD

Busbar entry from the top,

SIVACON 8PS system LX

Non-ventilated Ventilated Non-ventilated Ventilated Non-ventilated Ventilated

3WL1116 1,600 A 1,200 A 1,500 A 1,420 A 1,580 A 1,360 A 1,600 A

3WL1120 2,000 A 1,550 A 1,780 A 1,600 A 1,790 A 1,360 A 1,630 A

3WL1220 2,000 A 1,630 A 2,000 A 1,630 A 2,000 A 1,630 A 2,000 A

3WL1225 2,500 A 1,960 A 2,360 A 2,030 A 2,330 A 1,820 A 2,310 A

3WL1232 3,200 A 2,240 A 2,680 A 2,420 A 2,720 A 2,090 A 2,640 A

3WL1340 4,000 A 2,600 A 3,660 A 2,980 A 3,570 A 3,480 A 3,820 A

3WL1350 5,000 A 3,830 A 4,450 A 3,860 A 4,460 A 3,830 A 4,450 A

3WL1363 6,300 A 4,060 A 1) 4,890 A 1) - - 4,530 A 5,440 A

ACB type

Nominal

device

current

Rear busbar position

Busbar entry from the bottom,

SIVACON 8PS system LD or LX

Busbar entry from the top,

SIVACON 8PS system LD

Busbar entry from the top,

SIVACON 8PS system LX

Non-ventilated Ventilated Non-ventilated Ventilated Non-ventilated Ventilated

3WL1116 1,600 A 1,410 A 1,600 A 1,440 A 1,550 A 1,250 A 1,410 A

3WL1120 2,000 A 1,500 A 1,840 A 1,590 A 1,740 A 1,310 A 1,570 A

3WL1220 2,000 A 1,630 A 1,920 A 1,630 A 1,920 A 1,660 A 1,970 A

3WL1225 2,500 A 1,950 A 2,320 A 2,130 A 2,330 A 1,940 A 2,230 A

3WL1232 3,200 A 2,470 A 2,920 A 2,440 A 2,660 A 2,160 A 2,530 A

3WL1340 4,000 A 2,700 A 3,700 A 2,750 A 3,120 A 2,700 A 3,110 A

3WL1350 5,000 A 3,590 A 4,440 A 3,590 A 4,440 A 3,580 A 4,490 A

3WL1363 6,300 A 3,710 A 1) 4,780 A 1) - - 3,710 A 4,780 A

ACB type

Nominal

device

current

Top busbar position Rear busbar position

Longitudinal coupler Longitudinal coupler Transverse coupler

Non-ventilated Ventilated Non-ventilated Ventilated Non-ventilated Ventilated

3WL1106 630 A 630 A 630 A 630 A 630 A 630 A 630 A

3WL1108 800 A 800 A 800 A 800 A 800 A 800 A 800 A

3WL1110 1,000 A 1,000 A 1,000 A 1,000 A 1,000 A 1,000 A 1,000 A

3WL1112 1,250 A 1,160 A 1,250 A 1,140 A 1,250 A 1,170 A 1,250 A

3WL1116 1,600 A 1,390 A 1,600 A 1,360 A 1,600 A 1,410 A 1,600 A

3WL1120 2,000 A 1,500 A 1,850 A 1,630 A 1,910 A 1,500 A 1,840 A

3WL1220 2,000 A 1,630 A 1,930 A 1,710 A 2,000 A 1,630 A 1,920 A

3WL1125 2,500 A 1,960 A 2,360 A 1,930 A 2,440 A 1,950 A 2,320 A

3WL1132 3,200 A 2,200 A 2,700 A 2,410 A 2,700 A 2,470 A 2,920 A

3WL1140 4,000 A 2,840 A 3,670 A 2,650 A 3,510 A 2,700 A 3,700 A

3WL1350 5,000 A 3,660 A 4,720 A 3,310 A 4,460 A - -

3WL1363 6,300 A 3,920 A 5,180 A 3,300 A 5,060 A - -

1) SIVACON 8PS system LX

Rated currents

Tab. 3/6 states the rated currents for the different configu-

rations dependent on the cubicle type.

Tab. 3/6: Rated currents for cubicles with one 3WL

SIVACON S8 Planning Principles – Circuit-breaker design

3.2 Cubicles with up to three ACB

(3WL)

To allow space-saving installation, cubicles with up to three

circuit-breakers as incoming and/or outgoing circuit-break-

ers can be implemented for specific ACB types (3WL).

Cubicle dimensions and cable connection

In a cubicle with three circuit-breakers, the cables are

connected from the rear. A variant with cable connection

from the front does not offer any space advantages be-

cause of the required connection compartment. For this

application, cubicles with one circuit-breaker are used. The

three mounting slots can be designed independently of

each other either with a circuit-breaker, as device compart-

ment or as direct incoming feeder. Cubicle dimensions and

information about the cable connection are given in

Tab. 3/7 and Tab. 3/8. The number of connectible cables

may be restricted by the available roof/floor panel openings

and/or door installations.

Rated currents

The up to three circuit-breakers in the cubicle interact.

Dependent on the utilisation of the individual circuit-break-

ers and the current distribution within the cubicle, different

rated currents result for the individual circuit-breakers.

Tab. 3/9 states the maximum rated currents for three

concrete cases of current distribution in the cubicle:

• Variant A: same rated current for all three mounting slots

• Variant B: highest current for top mounting slot, lowest

current for bottom mounting slot

• Variant C: highest current for bottom mounting slot,

lowest current for top mounting slot

Information about an individual distribution of the rated

currents in the cubicle is available from your Siemens

contact.

Frame height for cubicles with up to three ACB is

2,200 mm.

Nominal

device

current

Cubicle

depth

Mounting

slot

Rated current at 35 °C ambient temperature

Variant A Variant B Variant C

Non-

ventilated Ventilated Non-

ventilated Ventilated

Up to

1,000 A 800 mm

Top 710 A 960 A 900 A 1,000 A 0 900 A

Center 710 A 955 A 905 A 1,000 A 980 A 1,000 A

Bottom 710 A 955 A 0 905 A 925 A 1,000 A

Up to

1,600 A 1,200 mm

Top 1,030 A 1,350 A 1,220 A 1,600 A 305 A 910 A

Center 1,030 A 1,350 A 1,230 A 1,600 A 1,200 A 1,440 A

Bottom 1,040 A 1,350 A 231 A 300 A 1,310 A 1,600 A

Tab. 3/7: Dimensions for cubicles with three ACB of type 3WL

Tab. 3/8: Cable connection in cubicles with up to three ACB

ACB type

Nominal

device

current

Cubicle width in mm Cubicle

depth

in mm

3-pole 4-pole

3WL1106 630 A 600 600 800

3WL1108 800 A 600 600 800

3WL1110 1,000 A 600 600 800

3WL1112 1,250 A 600 600 1,200 1)

3WL1116 1,600 A 600 600 1,200 1)

1) Main busbar up to 6,300 A

Tab. 3/9: Rated currents for special load cases of a circuit-breaker cubicle with three 3WL11 circuit-breakers in the cubicle

Cable lug DIN 46235

(240 mm2, M12) 1)

Max. number of cables connectible

per phase dependent on cubicle

depth

800 mm 1,200 mm

4 6

1) It is possible to use 300 mm2 cable lugs with a M12 screw,

but this cable lug is not in compliance with DIN 46235, although it

is supplied by some manufacturers.

30 SIVACON S8 Planning Principles – Circuit-breaker design

3.3 Cubicles with one MCCB (3VL)

The widths for the different cubicle types are listed by

MCCB type in Tab. 3/10. Information about cable connec-

tion and rated currents for the different configurations of

Cubicle widths for

3VL5763 (630 A), 3VL6780 (800 A), 3VL7712 (1,250 A), 3VL8716 (1,600 A)

Top busbar position Rear top busbar position Rear bottom busbar position

Cable entry from the top or bottom Cable entry from the

top

Cable entry from the

bottom

Cable entry from the

top

Cable entry from the

bottom

The position of the connecting bars is identical

for cable entry from the top or bottom Two main busbar systems in the cubicle are also possible

3-pole: cubicle width 400 mm 3-pole: cubicle width 400 mm

4-pole: cubicle width 400 mm 4-pole: cubicle width 600 mm

MCCB, busbar position, cable entry and ventilation condi-

tions is given in Tab. 3/11 and Tab. 3/12.

Tab. 3/10: Widths for incoming/outgoing feeder cubicles with MCCB

Tab. 3/11: Cable connection for cubicles with MCCB of type 3VL

MCCB type

Nominal

device

current

Rated current at 35 °C ambient temperature

Top busbar position Rear busbar position

Cable connection Cable entry from the bottom Cable entry from the top

Non-ventilated Ventilated Non-ventilated Ventilated Non-ventilated Ventilated

3VL5763 630 A 540 A 570 A 515 A 570 A 475 A 520 A

3VL6780 800 A 685 A 720 A 655 A 720 A 605 A 660 A

3VL7712 1,250 A 890 A 1,100 A 890 A 1,100 A 775 A 980 A

3VL8716 1,600 A 900 A 1,100 A 1,050 A 1,200 A 915 A 1,070 A

Tab. 3/12: Rated currents for cubicles with 3VL

Cable lug DIN 46235

(240 mm2, M12) 1)

Max. number of cables connectible

per phase dependent on rated current

Up to 800 A From 1,250

to 1,600 A

4 6

1) It is possible to use 300 mm2 cable lugs with an M12 screw (cable

lug is not in compliance with DIN 46235, although it is available

from some manufacturers)

SIVACON S8 Planning Principles – Circuit-breaker design

3.4 Cubicles for direct supply and

direct feeder

The different cubicle types:

1. Top busbar position, cable entry from the bottom or top

(the position of the connecting bars is identical for cable

entry from the top or bottom)

2. Rear top busbar position, cable entry from the top

3. Rear top busbar position, cable entry from the bottom

4. Rear bottom busbar position, cable entry from the top

5. Rear bottom busbar position, cable entry from the

bottom

are schematized in Fig. 3/3.

The cubicle width and maximum number of cables which

can be connected depend on the rated current (Tab. 3/13

and Tab. 3/14). The rated currents, in turn, depend on the

busbar position and cable entry (Tab. 3/15).

Fig. 3/3: Cubicle types for direct supply and direct feeder (refer to

the text for explanations)

1. 2. 3. 4. 5.

Tab. 3/13: Cubicle width for direct supply and direct feeder

Cable lug DIN 46235

(240 mm2, M12) 1)

Max. number of cables connectible per phase

dependent on nominal current

1,000 A 1,600 A 2,500 A 3,200 A 4,000 A

4 6 12 12 14

1) Using 300 mm2 cable lugs with an M12 screw is possible. However, this cable lug is not in compliance with DIN 46235, although it is

available at some manufacturers

The number of connectible cables may be restricted by the available roof/ﬂoor panel openings and/or door installations.

The position of the connection busbars is identical for front or rear connection in the cubicle.

Tab. 3/14: Cable connection for direct supply and direct feeder

Nominal current 1,000 A 1,600 A 2,500 A 3,200 A 4,000 A

Cubicle width 400 mm 400 mm 600 mm 600 mm 800 mm

Tab. 3/15: Rated currents for direct supply and direct feeder

Nominal current

Rated current at 35 °C ambient temperature

Top busbar position Rear busbar position

Cable connection Cable entry from the bottom Cable entry from the top

Non-ventilated Ventilated Non-ventilated Ventilated Non-ventilated Ventilated

1,000 A 905 A 1,050 A 1,100 A 1,190 A 1,120 A 1,280 A

1,600 A 1,300 A 1,500 A 1,530 A 1,640 A 1,480 A 1,740 A

2,500 A 1,980 A 2,410 A 2,230 A 2,930 A 2,210 A 2,930 A

3,200 A 2,340 A 2,280 A 2,910 A 3,390 A 2,770 A 3,390 A

4,000 A 3,430 A 4,480 A 3,300 A 4,210 A 3,140 A 4,210 A

32 SIVACON S8 Planning Principles – Circuit-breaker design

Chapter 4

Universal mounting design

4.1 Fixed-mounted design with

compartment door 37

4.2 In-line switch disconnectors

with fuses (3NJ62 / SASIL plus) 38

4.3 Withdrawable design 38

34 SIVACON S8 Planning Principles – Universal mounting design

designs makes for a space-optimized structure of the

switchboard. Tab. 4/1 gives an overview of the general

cubicle characteristics.

The universal mounting design of SIVACON S8 switch-

boards (Fig. 4/1) allows outgoing feeders in withdrawable

design, fixed-mounted design and plug-in in-line design to

be implemented. A combination of these mounting

4 Universal mounting design

Tab. 4/1: General cubicle characteristics for the universal mounting design

Application range - Incoming feeders up to 630 A

- Outgoing cable feeders up to 630 A

- Outgoing motor feeders up to 630 A

Degrees of protection - Up to IP43 Ventilated

- IP54 Non-ventilated

Cubicle dimensions - Cubicle height 2,000, 2,200 mm

- Cubicle width (rear connection in cubicle) 600 mm

- Cubicle width (front connection in cubicle) 1,000, 1,200 mm

Device compartment - Height 1,600, 1,800 mm

- Width 600 mm

Form of internal separation - Up to form 4b 1) Compartment door, functional

compartment door

Mounting designs - Withdrawable design

- Fixed-mounted design with compartment door

- In-line switch-disconnectors 3NJ62 with fuses 2)

- In-line switch-disconnectors SASIL plus with fuses (Jean Müller) 2)

1) Dependent on mounting design

2) Front connection in cubicle

Fig. 4/1: Cubicles for universal mounting design: on the left with front cable connection; on the right for rear cable connection

SIVACON S8 Planning Principles – Universal mounting design

Cubicle with forced cooling

Cubicles with forced cooling (Fig. 4/2) serve for the assem-

bly of functional units with a very high power loss, for

example, for withdrawable units with a frequency con-

verter up to 45 kW.

On the left, the cubicles are equipped with a 100 mm wide

ventilation duct. The width of the cable connection com-

partment is reduced by 100 mm so that the cubicle width

does not change as compared to a cubicle without forced

cooling.

The withdrawable units with forced cooling are equipped

with fans. The fan control comes completely configured.

No further settings are required upon start-up of the

switchboard. The fans are dimensioned such that the

second fan can ensure the required cooling of the with-

drawable unit if a fan fails. A failure message will be issued.

The cubicles with forced cooling comply with degree of

protection IP31. Connection is effected at the front of the

cubicle.

The other cubicle characteristics are identical to the cubicle

without forced cooling. All mounting designs and func-

tional units without forced cooling can be applied.

Fig. 4/2: Cubicle with forced cooling for universal mounting design

36 SIVACON S8 Planning Principles – Universal mounting design

connection compartment. In the case of 4-pole feeders, the

N conductor is allocated to the phase conductors L1, L2, L3

at the back of the cubicle. Ratings are stated in Tab. 4/2.

Combination of mounting designs

The different mounting designs can be combined in a

cubicle as shown in Fig. 4/3.

Vertical distribution busbar

The vertical distribution busbars with the phase conductors

L1, L2, L3 are arranged on the left at the back of the cubi-

cle. The PE, N or PEN busbars are arranged in the cable

Distribution busbar Proﬁle bar Flat copper 1)

Cross section 400 mm2650 mm21 x (40 mm x 10 mm) 2 x (40 mm x 10 mm)

Rated current at 35 °C ambient

temperature

Ventilated 905 A 1,100 A 865 A 1,120 A

Non-

ventilated 830 A 1,000 A 820 A 1,000 A

Rated short-time withstand

current Icw (1 sec) 2) 65 kA 65 kA 65 kA 65 kA

1) Top main busbar position

2) Rated conditional short-circuit current Icc = 150 kA

Tab. 4/2: Ratings of the vertical distribution busbar

Fig. 4/3: Combination options for universal mounting design

SIEMENS

SIVACON

2,200 / 2,000 mm

Withdrawable unit design

600 mm

1,800 / 1,600* mm

600 mm 600 / 400 * mm

Withdrawable

unit design

Withdrawable

unit design

Withdrawable unit design

Fixed-mounted design

Fixed-mounted

design

Fixed-mounted design

In-line design, plugged

* Frame height 2,000 mm

SIVACON S8 Planning Principles – Universal mounting design

4.1 Fixed-mounted design with

compartment door

In fixed-mounted design, the switching devices are in-

stalled on mounting plates. They can be equipped with

circuit-breakers or switch-disconnectors with fuses

(Fig. 4/4; left). Tab. 4/3 gives an overview of the cubicle

characteristics in fixed-mounted design. The incoming sides

are connected to the vertical distribution busbars.

For forms 2b and 4a without current measurement, cables

are connected directly at the switching device. The maxi-

mum cross sections that can be connected are stated in the

device catalogues. For forms 3b and 4b as well as for

feeders with current measurement (transformers), the

cables are connected in the cable connection compartment

(Fig. 4/4; right). The maximum connection cross sections

are stated in Tab. 4/4.

The rating for cable feeders is stated in Tab. 4/5. The ther-

mal interaction of the feeders in the cubicle has to be and

is considered by specifying the rated diversity factor (RDF):

Permissible continuous operational current (cable feeder) =

= rated current Inc x RDF

For the feeders in the cubicle, the rated diversity factor RDF

= 0.8 can be applied:

• regardless of the number of feeders in the cubicle

• regardless of the mounting position in the cubicle

For cubicles with a very high packing and/or power density,

a project-specific assessment is recommended. Further

information is available from your Siemens contact.

Tab. 4/3: Cubicle characteristics for the ﬁxed-mounted design

Application range - Incoming feeders up to 630 A

- Outgoing cable feeders up to 630 A

Form of internal

separation

- Form 2b Functional

compartment door

- Form 3b, 4a, 4b 1) Compartment

door

Mounting designs - Fixed-mounted module in compartment

Empty compartment, device compartment

1) Also form 4b type 7 in acc. with BS EN 61439-2 possible

Fig. 4/4: Equipment in ﬁxed-mounted design (left) and connection

terminals in the cable connection compartment (right)

Tab. 4/4: Connection cross sections in ﬁxed-mounted cubicles with

a front door

Nominal feeder current Max. connection cross section

≤ 250 A 120 mm2

> 250 A 240 mm2

Tab. 4/5: Ratings for cable feeders

Type

Nominal

device

current

Module height

Rated current Inc

at 35 °C ambient

temperature

3-pole 4-pole Non-

ventilated Ventilated

Fuse switch-disconnectors 1)

3NP1123 160 A 150 mm - 106 A 120 A

3NP1133 160 A 150 mm - 123 A 133 A

3NP1143 250 A 250 mm - 222 A 241 A

3NP1153 400 A 300 mm - 350 A 375 A

3NP1163 630 A 350 mm - 480 A 530 A

3NP4010 160 A 150 mm - 84 A 96 A

3NP4070 160 A 150 mm - 130 A 142 A

3NP4270 250 A 250 mm - 248 A 250 A

3NP4370 400 A 300 mm - 355 A 370 A

3NP4470 630 A 350 mm - 480 A 515 A

3NP5060

160 A 150 mm - 130 A 142 A

3NP5260 250 A 250 mm - 248 A 250 A

3NP5360 400 A 300 mm - 355 A 370 A

3NP5460

630 A 350 mm - 480 A 515 A

Switch-disconnectors with fuses 1)

3KL50 63 A 150 mm 250 mm 61 A 63 A

3KL52 125 A 250 mm 250 mm 120 A 125 A

3KL53 160 A 250 mm 250 mm 136 A 143 A

3KL55 250 A 300 mm 350 mm 250 A 250 A

3KL57 400 A 300 mm 350 mm 345 A 355 A

3KL61 630 A 450 mm 500 mm 535 A 555 A

Circuit-breakers

3RV2.1 16 A 150 mm - 12.7 A 14.1 A

3RV2.2 40 A 150 mm - 27 A 31.5 A

3RV2.3 52 A 150 mm - 39 A 40.5 A

3RV1.4 100 A 150 mm - 71 A 79 A

3VL1 160 A 150 mm 200 mm 121 A 151 A

3VL2 160 A 150 mm 200 mm 130 A 158 A

3VL3 250 A 200 mm 250 mm 248 A 250 A

3VL4 400 A 250 mm 300 mm 400 A 400 A

3VL5 630 A 250 mm 350 mm 525 A 565 A

3VA10 100 A 150 mm 200 mm 72 A 85 A

3VA11 160 A 150 mm 200 mm 112 A 125 A

3VA12 250 A 150 mm 200 mm 232 A 246 A

3VA20 100 A 150 mm 200 mm 100 A 100 A

3VA21 160 A 150 mm 200 mm 160 A 160 A

3VA22 250 A 150 mm 200 mm 201 A 226 A

3VA23 400 A 200 mm 250 mm 350 A 400 A

3VA24 630 A 200 mm 250 mm 410 A 495 A

Device compartments (usable overall depth 310 mm)

150 mm

200 mm

300 mm

400 mm

500 mm

600 mm

1) Rated current with fuse link = nominal device current

38 SIVACON S8 Planning Principles – Universal mounting design

available for the installation of in-line switch-disconnectors.

The basic cubicle characteristics are stated in Tab. 4/6.

Further information about in-line switch-disconnectors with

fuses can be found in Chapter Chapter 5.

Tab. 4/7: General cubicle characteristics for the withdrawable design

Application range - Incoming feeders up to 630 A

- Outgoing cable feeders up to 630 A

- Outgoing motor feeders up to 630 A

Form of internal separation - Form 3b, 4b 1) Compartment door,

compartment cover

Design options - Withdrawable unit in compartment

- Reserve compartment

- Empty compartment, device compartment

Design variants for feeders 2)

(see Fig. 4/5)

- Standard feature design (SFD)

- High feature design (HFD)

1) Also form 4b type 7 in acc. with BS EN 61439-2 possible

2) Withdrawable unit variants SFD and HFD can be mixed within one cubicle

Fig. 4/5: Design variants of the withdrawable units in standard feature design (SFD; left) and high feature design (HFD; right)

4.2 In-line switch-disconnectors

with fuses (3NJ62 / SASIL plus)

For the cubicle in universal mounting design, an adapter is

available that allows the installation of in-line switch-dis-

connectors with fuses. This adapter is mounted at the

bottom of the cubicle. It occupies 600 mm in the cubicle's

device compartment. An installation height of 500 mm is

4.3 Withdrawable design

If fast replacement of functional units is required in order to

prevent downtimes, the withdrawable design offers a safe

and flexible solution. Regardless of whether small or nor-

mal withdrawable units are used, the size is optimally

Tab. 4/6: Cubicle characteristics for in-line switch-disconnectors

adapted for the required performance. The patented with-

drawable unit contact system has been designed to be

user-friendly and wear-resistant. Tab. 4/7 lists typical cubi-

cle characteristics of the withdrawable design.

Application range - Incoming feeders up to 630 A

- Outgoing cable feeders up to 630 A

Form of internal separation - Form 3b, 4b

Degree of protection - Up to IP41 Ventilated

Cubicle dimensions - Width (front connection in cubicle) 1,000, 1,200 mm

SIVACON S8 Planning Principles – Universal mounting design

4.3.1 Withdrawable design - standard

feature design (SFD)

The withdrawable units provide a fixed contact system.

Disconnected, test and connected position can be effected

by moving the withdrawable unit (Fig. 4/6). In discon-

nected or test position, degree of protection IP30 is

achieved. Moving the withdrawable unit under load is

prevented by an operating error protection.

Withdrawable units in SFD provide a detachable cover.

Controls and signalling devices are installed in an instru-

ment panel and integrated into the withdrawable unit

cover (Fig. 4/7). The contact system can be applied up to a

rated current of 250 A. All withdrawable units are equipped

with up to 40 auxiliary contacts. In SFD, normal withdrawa-

ble units with a withdrawable unit height of 100 mm or

higher (grid size 50 mm) can be used. Tab. 4/8 summarizes

the characteristics of withdrawable units in SFD.

Mechanical withdrawable unit coding

Withdrawable unit height

100 mm

15 coding options

Withdrawable unit height

> 100 mm

21 coding options

Locking capability

In "0" position for 3UC7

door coupling rotary drive

Up to 5 padlocks

with a shackle diameter of 4.5 mm

Up to 3 padlocks

with a shackle diameter of 8.5 mm

Instrument panel

Max. installation depth for

devices

60 mm

Usable front area if

withdrawable unit height

100 mm

198 mm

57 mm

Usable front area if

withdrawable unit height

> 100 mm

198 mm

97 mm

Withdrawable unit position signal

With optional signalling

switch (-S20)

Feeder available signal

Test position signal

Communication interfaces

PROFIBUS 1)

(up to 12 Mbit/sec)

Via auxiliary contacts of the control

plug

PROFINET 2) Separate RJ45 plug

1) Apart from that, other protocols based on the EIA-485 (RS485) interface

standard such as Modbus RTU can be used

2) Apart from that, other protocols based on the Industrial Ethernet standard

such as Modbus/TCP can be used

Fig. 4/6: Positions in the SFD contact system

Disconnected

position

Test

position

Connected

position

Fig. 4/7: Normal withdrawable unit in SFD with a withdrawable

unit height of 100 mm

Instrument panel

Handle

Basic withdrawable unit Control plug

Position indicator

(option)

Unlock knob

Device plate

to be equipped from two sides,

depth/height staggered

Contact enclosure

output

Contact enclosure

input

Tab. 4/8: Characteristics of withdrawable units in SFD

40 SIVACON S8 Planning Principles – Universal mounting design

4.3.2 Withdrawable unit compartment in

SFD

The vertical distribution busbar is covered test finger

proofed (IP2X). Phase separation is possible. No connection

work is required in the compartment (Fig. 4/8). The internal

separation options up to form 4b lead to a high degree of

personal safety. Connection is effected in a separate cable

connection compartment. The connection data for main

circuits are stated in Tab. 4/9, those for auxiliary circuits in

Tab. 4/10 and the number of available auxiliary contacts in

Tab. 4/11.

Tab. 4/9: Connection data for the main circuit

Withdrawable unit

height Nominal feeder current Terminal size

Maximum

connection cross

section

Front connection in cubicle ≥ 100 mm

≤ 35 A 16 mm2-

≤ 63 A 35 mm2-

≤ 120 A 70 mm2-

≤ 160 A 95 mm2-

≤ 250 A 150 mm2-

Rear connection in cubicle

100 mm ≤ 35 A 16 mm2-

≥ 150 mm ≤ 250 A - 1 x 185 mm2

2 x 120 mm2

Tab. 4/10: Connection data for the auxiliary circuit

Fig. 4/8: Open withdrawable unit compartments in SFD

Withdrawable unit

height Control plug type

Number of available auxiliary contacts (rated current 10 A / 250 V)

Without communication With PROFIBUS With PROFINET

≥ 100 mm 12-pole 12 9 12

24-pole 24 21 24

≥ 150 mm 32-pole 32 29 -

40-pole 40 37 -

Tab. 4/11: Number of available auxiliary contacts for withdrawable

units in SFD

Type Terminal size

Push-in terminal connection 4 mm2

Screw connection 6 mm2

SIVACON S8 Planning Principles – Universal mounting design

4.3.3 Withdrawable design - high feature

design (HFD)

The withdrawable units provide a mobile, wear-resistant

contact system. Disconnected, test and connected position

can be effected by moving the contacts without moving

the withdrawable unit behind the closed compartment

door (Fig. 4/10). Moving the contacts unit under load is

prevented by an maloperation protection. The degree of

protection is kept in every position. In the disconnected

position, all withdrawable unit parts such as the contacts

are located within the device contour and are protected

against damage.

Fig. 4/9: Structure of a small withdrawable unit in HFD

Test

position

Disconnected

position

Connected

position

TEST

Fig. 4/10: Positions in the HFD contact system

Instrument panel

Operator panel for with-

drawable unit incl.

- Rotary operating mechanism

- Position indicator

- Operating error protection

- Locking option

Basic with-

drawable unit

Contact enclosure of

control plug

Contact enclosure

input / output

Device/cable cover

(removable)

Withdrawable units are available as small withdrawable

units (size ½ and ¼, see Fig. 4/9 and Tab. 4/12) and as

normal withdrawable units (Tab. 4/12). The withdrawable

units of all sizes provide a uniform user interface.

In addition to the main switch, the individual positions can

be locked. Controls and signalling devices are installed in

an instrument panel. All withdrawable units are equipped

with up to 40 auxiliary contacts.

Tab. 4/12: Withdrawable units in HFD

Type

Withdrawable

unit

height

View

Small

withdrawable

unit

Width ¼

150 mm,

200 mm

Small

withdrawable

unit

Width ½

150 mm,

200 mm

Normal

withdrawable

unit

≥ 100 mm

(grid 50 mm)

42 SIVACON S8 Planning Principles – Universal mounting design

Small withdrawable unit Normal withdrawable unit

Mechanical withdrawable unit coding

96 coding options

(withdrawable unit height 150, 200 mm)

96 coding options (withdrawable unit height 100 mm)

9,216 coding options (withdrawable

unit height > 100 mm)

Locking capability

The withdrawable units can be locked by means of a padlock with a shackle diameter of 6 mm.

The withdrawable unit can then neither be moved to the disconnected, test or connected position

nor be removed from the compartment.

Locking capability of the main switch in the "0" position

is integrated into the control unit:

up to 3 padlocks

with 4.5 mm Ø (shackle)

Locking capability for 3UC7 door coupling rotary drive in

"0" position:

up to 5 padlocks

with 4.5 mm Ø (shackle)

up to 3 padlocks

with 8.5 mm Ø (shackle)

Instrument panel

Maximum installation

depth for devices

60 mm 70 mm

Usable front area for installation height 150 mm see Fig. 4/11 see Fig. 4/13

for installation height 200 mm see Fig. 4/12

Withdrawable unit position signal

With optional signalling

switch (-S20)

Feeder available signal Feeder available signal

Test position signal Test position signal

Communication interfaces

PROFIBUS 1)

(up to 12 Mbit/sec)

Via auxiliary contacts of the control plug Via auxiliary contacts of the control plug

PROFINET 2) Size ¼: One separate RJ45 plug One or two separate RJ45 plug(s)

Size ½: One or two separate RJ45 plug(s)

1) Apart from that, other protocols based on the EIA-485 (RS485) interface standard such as Modbus RTU can be used

2) Apart from that, other protocols based on the Industrial Ethernet standard such as Modbus TCP can be used

Tab. 4/13: Characteristics of the withdrawable units in HFD

Characteristics of the withdrawable units in HFD

Tab. 4/13 is subdivided into small and normal withdrawable

units. The installation height has to be observed addition-

ally. The mechanical coding of the compartments and

withdrawable units prevents the exchanging of withdrawa-

ble units of identical size. The control and display devices

for the feeder are installed in the instrument panel.

SIVACON S8 Planning Principles – Universal mounting design

Fig. 4/11: Front areas usable for an instrument panel on small withdrawable units with an installation height of 150 mm

105

109

104

Dimensions in mm

Size: ¼ Size: ½

Fig. 4/12: Front areas usable for an instrument panel on small withdrawable units with an installation height of 200 mm

105

159

104

Dimensions in mm

Size: ¼ Size: ½

Fig. 4/13: Front areas usable for an instrument panel on normal withdrawable units

190 190

51.5

Dimensions in mm

Height of withdrawable unit 100 mm Height of withdrawable unit > 100 mm

44 SIVACON S8 Planning Principles – Universal mounting design

shutters are opened automatically when the withdrawable

unit is inserted into the compartment.

Connection is effected in a separate cable connection

compartment. The connection data for main circuits are

stated in Tab. 4/14, those for auxiliary circuits in Tab. 4/15

and the number of available auxiliary contacts in Tab. 4/16.

The rated current for auxiliary contacts is:

• 6 A (250 V) for small withdrawable units

• 10 A (250 V) for normal withdrawable units

4.3.4 Withdrawable unit compartment in

HFD

The vertical distribution busbar is covered test finger

proofed (IP2X). Phase separation is possible. No connection

work is required in the compartment (Fig. 4/14). The

internal separation options up to form 4b lead to a high

degree of personal safety.

For small withdrawable units, an adapter plate is mounted

at the top of the compartment (Fig. 4/15). The tap-off

openings for the input contacts of the withdrawable units

in the compartment can be equipped with shutters. The

Tab. 4/14: Connection data for the main circuit

Withdrawable unit

height Nominal feeder current Terminal size Maximum connection

cross section

Small withdrawable unit 150 mm, 200 mm ≤ 35 A 16 mm2-

≤ 63 A 35 mm2-

Normal withdrawable unit

100 mm ≤ 35 A 16 mm2-

≤ 63 A 35 mm2-

≥ 150 mm

≤ 250 A - 1 x 185 mm2

2 x 120 mm2

> 250 A - 2 x 240 mm2

4 x 120 mm2

Tab. 4/15: Connection data for the auxiliary circuit

Fig. 4/14: Compartment for normal withdrawable unit in HFD

Withdrawable unit

height Control plug type

Number of available auxiliary contacts

Without

communication With PROFIBUS With PROFINET

Small withdrawable unit 150, 200 mm 26-pole 26 20 19

40-pole 40 37 32

Normal withdrawable unit

≥ 100 mm 12-pole 12 9 12

24-pole 24 21 24

≥ 150 mm 32-pole 32 29 32

40-pole 40 37 40

Tab. 4/16: Number of available auxiliary contacts for withdrawable

units in HFD

Type Terminal size

Push-in terminal connection 2.5 mm2

Screw connection 2.5 mm2

Fig. 4/15: Adapter plate for small withdrawable units

SIVACON S8 Planning Principles – Universal mounting design

4.3.5 Ratings for cable feeders in SFD / HFD

Withdrawable units in SFD are applied up to a rated current

of 250 A. The two withdrawable unit variants SFD and HFD

can be mixed within one cubicle.

The thermal interaction of the feeders in the cubicle has to

be and is considered by specifying the rated diversity factor

(RDF):

Permissible continuous operational current (cable feeder) =

= rated current Inc x RDF

Small withdrawable unit 1)

Type

Nominal

device

current

Minimum withdrawable unit size (height) Rated current Inc

at 35 °C ambient temperature

3-pole 4-pole Non-ventilated Ventilated

Main switch and fuses 3)

3LD22 32 A 150 mm - ¼, ½ 150 mm - ¼, ½ 32 A 32 A

3LD25 63 A 200 mm - ¼, ½ 200 mm - ¼, ½ 52.5 A 55.5 A

Circuit-breakers

3RV2.1 16 A 150 mm - ¼, ½ - 14.6 A 15.2 A

3RV2.2 40 A 150 mm - ¼, ½ - 32 A 33.5 A

3RV2.3 52 A 150 mm - ½ - 40 A 41 A

3RV1.4 100 A 150 mm - ½ - 50 A 51.5 A

Normal withdrawable unit

Type

Nominal

device

current

Minimum withdrawable unit size (height) Rated current Inc

at 35 °C ambient temperature

3-pole 4-pole Non-ventilated Ventilated

Main switch and fuses 3)

3LD22 32 A 100 mm - 32 A 32 A

Switch-disconnectors with fuses 3)

3KL50 63 A 150 mm 150 mm 63 A 63 A

3KL52 125 A 150 mm 150 mm 117 A 122 A

3KL53 160 A 200 mm 200 mm 137 A 142 A

3KL55 250 A 300 mm 300 mm 220 A 222 A

3KL57 400 A 300 mm 300 mm 305 A 340 A

3KL61 630 A 400 mm 500 mm 430 A 485 A

Circuit-breakers

3RV2.1 16 A 100 mm - 14.6 A 15.2 A

3RV2.2 40 A 100 mm - 32 A 33.5 A

3RV2.3 52 A 150 mm - 40 A 41 A

3RV1.4 100 A 150 mm - 50 A 51.5 A

3VL1 160 A 200 mm 200 mm 135 A 141 A

3VL2 160 A 200 mm 200 mm 136 A 142 A

3VL3 250 A 200 mm 250 mm 201 A 217 A

3VL4 400 A 200 mm 400 mm 305 A 330 A

3VL5 630 A 300 mm 400 mm 375 A 415 A

3VL5 630 A 500 mm 2) - 435 A 485 A

3VA10 100 A 150 mm 200 mm 92 A 97 A

3VA11 160 A 150 mm 200 mm 128 A 133 A

3VA12 250 A 200 mm 250 mm 218 A 226 A

3VA20 100 A 200 mm 200 mm 100 A 100 A

3VA21 160 A 200 mm 200 mm 155 A 160 A

3VA22 250 A 200 mm 250 mm 189 A 203 A

3VA23 400 A 300 mm 300 mm 320 A 350 A

3VA24 630 A 300 mm 400 mm 365 A 405 A

1) Type: ¼ = small withdrawable unit size ¼ 2) Circuit-breaker in vertical mounting position

½ = small withdrawable unit size ½ 3) Rated current with fuse link = nominal device current

Tab. 4/17: Rated currents and minimum withdrawable unit heights for cable feeders in SFD / HFD

For the feeders in the cubicle, the rated diversity factor RDF

= 0.8 can be applied:

• regardless of the number of feeders in the cubicle

• regardless of the mounting position in the cubicle

Rated currents and minimum withdrawable unit heights for

cable feeders are stated in Tab. 4/17. For cubicles with a

very high packing and/or power density, a project-specific

assessment is recommended. Further information is availa-

ble from your Siemens contact.

46 SIVACON S8 Planning Principles – Universal mounting design

4.3.6 Ratings for

motor feeders in SFD / HFD

Withdrawable units in SFD are applied up to a rated current

of 250 A. The two withdrawable unit variants SFD and HFD

can be mixed within one cubicle.

The following tables list the minimum withdrawable unit

sizes (Tab. 4/18 to Tab. 4/22) for motor feeders. Dependent

on the number of project-specific secondary devices and

the control wiring, larger withdrawable units might be

required.

More detailed information about motor feeders is available

from your local Siemens contact.

• Motor feeders for rated voltage

500 V and 690 V

• Motor feeders for tripping class up to CLASS 30

• Motor feeders for short-circuit breaking capacity

up to 100 kA

• Motor feeders with soft starter

• Motor feeders with frequency converter

• Small withdrawable units for star-delta circuit

The thermal interaction of the feeders in the cubicle has to

be and is considered by specifying the rated diversity factor

(RDF):

Permissible continuous operational current (motor feeder)

= rated current Inc x RDF

For the feeders in the cubicle, the rated diversity factor RDF

= 0.8 can be applied:

• regardless of the number of feeders in the cubicle

• regardless of the mounting position in the cubicle

For a rated diversity factor RDF > 0.8, the power grading

next in size is to be set for the motor feeder.

For cubicles with a very high packing and/or power density,

a project-specific assessment is recommended; information

about that is available from your Siemens contact.

The standard values for the operating currents of three-

phase asynchronous motors can be found in Chapter 10.

Small withdrawable unit 1)

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit size

at 35 °C ambient temperature

Height 150 mm Height 200 mm

Direct

contactor

Reversing

circuit

Direct

contactor

Reversing

circuit

0.25 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.37 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.55 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.75 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

1.1 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

1.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

2.2 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

3 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

4 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

5.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

7.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

11 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

15 kW ½ ½ ¼, ½ ½

18.5 kW ½ ½ ¼, ½ ½

Tab. 4/18: Minimum withdrawable unit sizes for:

fused motor feeders, 400 V, CLASS 10,

with overload relay, type 2 at 50 kA

Normal withdrawable unit

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit height

at 35 °C ambient temperature

Direct

contactor

Reversing

circuit Star-delta

0.25 kW 100 mm 100 mm 150 mm

0.37 kW 100 mm 100 mm 150 mm

0.55 kW 100 mm 100 mm 150 mm

0.75 kW 100 mm 100 mm 150 mm

1.1 kW 100 mm 100 mm 150 mm

1.5 kW 100 mm 100 mm 150 mm

2.2 kW 100 mm 100 mm 150 mm

3 kW 100 mm 100 mm 150 mm

4 kW 100 mm 100 mm 150 mm

5.5 kW 100 mm 100 mm 150 mm

7.5 kW 100 mm 100 mm 150 mm

11 kW 100 mm 100 mm 150 mm

15 kW 150 mm 150 mm 150 mm

18.5 kW 150 mm 150 mm 200 mm

22 kW 150 mm 150 mm 200 mm

30 kW 200 mm 200 mm 200 mm

37 kW 200 mm 200 mm 200 mm

45 kW 200 mm 200 mm 250 mm

55 kW 400 mm 500 mm 250 mm

75 kW 400 mm 500 mm 250 mm

90 kW 400 mm 500 mm 500 mm

110 kW 500 mm 600 mm 500 mm

132 kW 500 mm 600 mm 500 mm

160 kW 500 mm 600 mm 500 mm

200 kW 600 mm 700 mm 700 mm

250 kW 600 mm 700 mm 700 mm

1) Type: ¼ = small withdrawable unit size ¼

½ = small withdrawable unit size ½

SIVACON S8 Planning Principles – Universal mounting design

Small withdrawable unit 1)

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit size

at 35 °C ambient temperature

Height 150 mm Height 200 mm

Direct

contactor

Reversing

circuit

Direct

contactor

Reversing

circuit

0.25 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.37 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.55 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.75 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

1.1 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

1.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

2.2 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

3 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

4 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

5.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

7.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

11 kW ½½½½

15 kW ½½½½

18.5 kW ½ - ½ ½

22 kW ½ - ½ ½

30 kW - - ½ -

Tab. 4/19: Minimum withdrawable unit sizes for:

fused motor feeders, 400 V, CLASS 10,

with SIMOCODE, type 2 at 50 kA

Normal withdrawable unit

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit height

at 35 °C ambient temperature

Direct

contactor

Reversing

circuit Star-delta

0.25 kW 100 mm 100 mm 150 mm

0.37 kW 100 mm 100 mm 150 mm

0.55 kW 100 mm 100 mm 150 mm

0.75 kW 100 mm 100 mm 150 mm

1.1 kW 100 mm 100 mm 150 mm

1.5 kW 100 mm 100 mm 150 mm

2.2 kW 100 mm 100 mm 150 mm

3 kW 100 mm 100 mm 150 mm

4 kW 100 mm 100 mm 150 mm

5.5 kW 100 mm 100 mm 150 mm

7.5 kW 100 mm 100 mm 150 mm

11 kW 100 mm 100 mm 150 mm

15 kW 100 mm 100 mm 150 mm

18.5 kW 150 mm 150 mm 200 mm

22 kW 150 mm 150 mm 200 mm

30 kW 150 mm 250 mm 250 mm

37 kW 150 mm 250 mm 250 mm

45 kW 150 mm 250 mm 250 mm

55 kW 300 mm 400 mm 400 mm

75 kW 300 mm 400 mm 400 mm

90 kW 300 mm 400 mm 400 mm

110 kW 400 mm 500 mm 500 mm

132 kW 500 mm 500 mm 700 mm

160 kW 500 mm 500 mm 700 mm

200 kW 700 mm 700 mm 700 mm

250 kW 700 mm 700 mm 700 mm

1) Type: ¼ = small withdrawable unit size ¼

½ = small withdrawable unit size ½

Small withdrawable unit 1)

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit size

at 35 °C ambient temperature

Height 150 mm Height 200 mm

Direct

contactor

Reversing

circuit

Direct

contactor

Reversing

circuit

0.25 kW ½ - ¼, ½ ¼, ½

0.37 kW ½ - ¼, ½ ¼, ½

0.55 kW ½ - ¼, ½ ¼, ½

0.75 kW ½ - ¼, ½ ¼, ½

1.1 kW ½ - ¼, ½ ¼, ½

1.5 kW ½ - ¼, ½ ¼, ½

2.2 kW ½ - ¼, ½ ¼, ½

3 kW ½ - ¼, ½ ¼, ½

4 kW ½ - ¼, ½ ¼, ½

5.5 kW ½ - ¼, ½ ¼, ½

7.5 kW ½ - ¼, ½ ¼, ½

11 kW ½ - ¼, ½ ¼, ½

15 kW ½ - ½ ½

18.5 kW ½ - ½ ½

Tab. 4/20: Minimum withdrawable unit sizes for:

fuseless motor feeders, 400 V, CLASS 10,

overload protection with circuit-breaker, type 2 at 50 kA

Normal withdrawable unit

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit height

at 35 °C ambient temperature

Direct

contactor

Reversing

circuit Star-delta

0.25 kW 100 mm 100 mm 200 mm

0.37 kW 100 mm 100 mm 200 mm

0.55 kW 100 mm 100 mm 200 mm

0.75 kW 100 mm 100 mm 200 mm

1.1 kW 100 mm 100 mm 200 mm

1.5 kW 100 mm 100 mm 200 mm

2.2 kW 100 mm 100 mm 200 mm

3 kW 100 mm 100 mm 200 mm

4 kW 100 mm 100 mm 200 mm

5.5 kW 100 mm 150 mm 200 mm

7.5 kW 100 mm 150 mm 200 mm

11 kW 100 mm 150 mm 200 mm

15 kW 150 mm 150 mm 200 mm

18.5 kW 150 mm 150 mm 200 mm

22 kW 150 mm 150 mm 200 mm

30 kW 200 mm 200 mm 200 mm

37 kW 200 mm 200 mm 200 mm

45 kW 200 mm 200 mm 200 mm

55 kW 400 mm 500 mm 250 mm

75 kW 400 mm 500 mm 250 mm

90 kW 400 mm 500 mm 500 mm

110 kW 500 mm 600 mm 500 mm

132 kW 500 mm 600 mm 500 mm

160 kW 500 mm 600 mm 500 mm

200 kW 600 mm 700 mm 700 mm

250 kW 600 mm 700 mm 700 mm

1) Type: ¼ = small withdrawable unit size ¼

½ = small withdrawable unit size ½

48 SIVACON S8 Planning Principles – Universal mounting design

Small withdrawable unit 1)

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit size at 35 °C ambient

temperature

Height 150 mm Height 200 mm

Direct

contactor

Reversing

circuit

Direct

contactor

Reversing

circuit

0.25 kW ½ ½ ¼, ½ ¼, ½

0.37 kW ½ ½ ¼, ½ ¼, ½

0.55 kW ½ ½ ¼, ½ ¼, ½

0.75 kW ½ ½ ¼, ½ ¼, ½

1.1 kW ½ ½ ¼, ½ ¼, ½

1.5 kW ½ ½ ¼, ½ ¼, ½

2.2 kW ½ ½ ¼, ½ ¼, ½

3 kW ½ ½ ¼, ½ ¼, ½

4 kW ½ ½ ¼, ½ ¼, ½

5.5 kW ½ ½ ¼, ½ ¼, ½

7.5 kW ½ ½ ¼, ½ ¼, ½

11 kW ½½½½

15 kW - - ½ ½

18.5 kW - - ½ -

22 kW - - ½ -

30 kW - - ½ -

Tab. 4/22: Minimum withdrawable unit sizes for:

fuseless motor feeders, 400 V, CLASS 10,

with SIMOCODE, type 2 at 50 kA

Normal withdrawable unit

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit height at 35 °C

ambient temperature

Direct

contactor

Reversing

circuit Star-delta

0.25 kW 100 mm 100 mm 150 mm

0.37 kW 100 mm 100 mm 150 mm

0.55 kW 100 mm 100 mm 150 mm

0.75 kW 100 mm 100 mm 150 mm

1.1 kW 100 mm 100 mm 150 mm

1.5 kW 100 mm 100 mm 150 mm

2.2 kW 100 mm 100 mm 150 mm

3 kW 100 mm 100 mm 150 mm

4 kW 100 mm 100 mm 150 mm

5.5 kW 100 mm 100 mm 150 mm

7.5 kW 100 mm 100 mm 150 mm

11 kW 150 mm 150 mm 150 mm

15 kW 150 mm 150 mm 200 mm

18.5 kW 200 mm 250 mm 250 mm

22 kW 200 mm 250 mm 250 mm

30 kW 200 mm 250 mm 250 mm

37 kW 200 mm 250 mm 250 mm

45 kW 200 mm 250 mm 250 mm

55 kW 300 mm 400 mm 400 mm

75 kW 300 mm 400 mm 400 mm

90 kW 300 mm 400 mm 400 mm

110 kW 400 mm 500 mm 500 mm

132 kW 500 mm 500 mm 700 mm

160 kW 500 mm 500 mm 700 mm

200 kW 600 mm 700 mm 700 mm

250 kW 600 mm 700 mm 700 mm

1) Type: ¼ = small withdrawable unit size ¼

½ = small withdrawable unit size ½

Tab. 4/21: Minimum withdrawable unit sizes for:

fuseless motor feeders, 400 V, CLASS 10,

with overload relay, type 2 at 50 kA

Small withdrawable unit 1)

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit size at 35 °C ambient

temperature

Height 150 mm Height 200 mm

Direct

contactor

Reversing

circuit

Direct

contactor

Reversing

circuit

0.25 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.37 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.55 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

0.75 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

1.1 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

1.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

2.2 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

3 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

4 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

5.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

7.5 kW ¼, ½ ¼, ½ ¼, ½ ¼, ½

11 kW ½½½½

15 kW ½½½½

18.5 kW ½ - ½ ½

22 kW ½ - ½ ½

30 kW - - ½ -

Normal withdrawable unit

Motor

power P

(AC-2/AC3)

Minimum withdrawable unit height at 35 °C

ambient temperature

Direct contactor Reversing

circuit Star-delta

0.25 kW 100 mm 100 mm 150 mm

0.37 kW 100 mm 100 mm 150 mm

0.55 kW 100 mm 100 mm 150 mm

0.75 kW 100 mm 100 mm 150 mm

1.1 kW 100 mm 100 mm 150 mm

1.5 kW 100 mm 100 mm 150 mm

2.2 kW 100 mm 100 mm 150 mm

3 kW 100 mm 100 mm 150 mm

4 kW 100 mm 100 mm 150 mm

5.5 kW 100 mm 100 mm 150 mm

7.5 kW 100 mm 100 mm 150 mm

11 kW 100 mm 100 mm 150 mm

15 kW 100 mm 100 mm 150 mm

18.5 kW 150 mm 150 mm 200 mm

22 kW 150 mm 150 mm 200 mm

30 kW 150 mm 250 mm 250 mm

37 kW 150 mm 250 mm 250 mm

45 kW 150 mm 250 mm 250 mm

55 kW 300 mm 400 mm 400 mm

75 kW 300 mm 400 mm 400 mm

90 kW 300 mm 400 mm 400 mm

110 kW 400 mm 500 mm 500 mm

132 kW 500 mm 500 mm 700 mm

160 kW 500 mm 500 mm 700 mm

200 kW 700 mm 700 mm 700 mm

250 kW 700 mm 700 mm 700 mm

1) Type: ¼ = small withdrawable unit size ¼

½ = small withdrawable unit size ½

Chapter 5

In-line design, plug-in

5.1 In-line switch-disconnectors 3NJ62

with fuses 51

5.2 In-line switch-disconnectors SASIL plus

with fuses 53

50 SIVACON S8 Planning Principles – In-line design, plug-in

Connection is effected directly at the switching device The

maximum cable cross sections that can be connected are

stated in the device catalogues. The in-line switch-discon-

nector allows the installation of a measuring instrument for

single-pole measurement. For three-pole measurement,

the measuring instruments can be installed in the device or

cable compartment door. The associated current transform-

ers are integrated into the in-line unit on the cable feeder

side.

The plug-in design for SIVACON S8 switchboard (Fig. 5/1)

with switching devices in in-line design with an incom-

ing-side plug contact allows easy and fast modification or

replacement under operating conditions. The pluggable

in-line units are operated directly at the device. Tab. 5/1

gives an overview of the general cubicle characteristics.

5 In-line design, plug-in

Tab. 5/1: General cubicle characteristics for in-line design, plug-in

Application

range

- Incoming feeders up to 630 A

- Outgoing cable feeders up to 630 A

Degrees of protection - Up to IP41 Ventilated

Cubicle dimensions - Cubicle height 2,000, 2,200 mm

- Cubicle width (front connection in the cubicle) 1,000, 1,200 mm

Device compartment - Height 1,550, 1,750 mm

- Width 600 mm

Form of internal separation - Form 3b, 4b

Design options

- In-line switch-disconnectors 3NJ62 with fuses

- In-line switch-disconnectors SASIL plus with fuses (Jean Müller)

- Empty slot, device compartment

Fig. 5/1: Cubicles for in-line design, plug-in: on the left for in-line switch-disconnectors 3NJ62 with fuses, on the right for switch-

disconnectors SASIL plus with fuses

SIVACON S8 Planning Principles – In-line design, plug-in

5.1 In-line switch-disconnectors

3NJ62 with fuses

In-line switch-disconnectors 3NJ62 with fuses

(Fig. 5/2) provide single as well as double breaking as a

standard feature.

Rating data of the vertical 3NJ62 distribution busbar

The vertical distribution busbars with the phase conductors

L1, L2, L3 are arranged at the back of the cubicle. The PE, N

or PEN busbars are arranged in the cable connection com-

partment. In the case of 4-pole feeders, the N conductor is

allocated to the phase conductors L1, L2, L3 at the back of

the cubicle.

The vertical distribution busbar is covered test finger

proofed (IP2X). The rated data are stated in Tab. 5/2.

Rating data of the 3NJ62 cable feeders

Apart from the space requirements for additional built-in

elements (Tab. 5/3), the derating factor stated in Tab. 5/4 is

to be set for determining the permissible operating current

of a fuse link. The space requirements for the cable feeders

of the different in-line units depend on the nominal device

current (Tab. 5/5).

Distribution busbar cross section 60 x 10 mm280 x 10 mm2

Rated current at 35 °C ambient

temperature 1,560 A 2,100 A

Rated short-time withstand

current Icw (1 sec) 1) 50 kA 50 kA

1) Rated conditional short-circuit current Icc = 100 kA

Tab. 5/2: Rating data of the vertical distribution busbar 3NJ62

Built-in elements Height in mm Version

Blanking cover for

empty slots

50 1) Plastic

100, 200, 300 Metal

Device compartment

(mounting

plate with

compartment door)

200, 400, 600 Usable overall device

depth 180 mm

1) Accessory 3NJ6900-4CB00

Tab. 5/3: Additional built-in elements for 3NJ62

Tab. 5/4: Derating factors for 3NJ62 fuse links

Tab. 5/5: Rating data of the 3NJ62 cable feeders

Nominal current of fuse link Derating factor F

In < 630 A 0.8

In ≥ 630 A 0.79

Fig. 5/2: Pluggable in-line switch-disconnectors 3NJ62

Type Nominal device

current

Space requirements of the in-line unit (height) 1)

Size Rated current 1)

at 35 °C ambient temperature

3-pole 4-pole

3NJ6203 160 A 50 mm 100 mm 00 125 A

3NJ6213 250 A 100 mm 150 mm 1 200 A

3NJ6223 400 A 200 mm 250 mm 2 320 A

3NJ6233 630 A 200 mm 250 mm 3 500 A

1) Rated current with fuse link = nominal device current

The conﬁguration rules stated in the following are to be observed

52 SIVACON S8 Planning Principles – In-line design, plug-in

Configuration rules

For the completely equipped cubicle, the rated diversity

factor (RDF) in accordance with IEC 61439-2 applies.

Non-observance of these notes might result in premature

ageing of fuses and their uncontrolled tripping due to local

overheating. The permissible operating current of all in-line

units in the cubicle is limited by the rated current of the

vertical distribution busbar.

All data refer to an ambient temperature of the switchgear

of 35 °C on 24 h average. Conversion factors for different

ambient temperatures are stated in Tab. 5/6.

Ambient temperature of the

switchgear 20 °C 25 °C 30 °C 35 °C 40 °C 45 °C 50 °C 55 °C

Conversion factor 1.10 1.07 1.04 1.00 0.95 0.90 0.85 0.80

Tab. 5/6: Conversion factors for different ambient temperatures

Rating data and arrangement notes for the configuration of

in-line units and covers are given in Tab. 5/7. The in-line

switch-disconnectors are arranged in the cubicle either in

groups or individually in decreasing order from size 3 to

size 00. Blanking covers with vent slots are mounted in

between for ventilation.

Tab. 5/7: Conﬁguration rules for 3NJ62: arrangement of the in-line units in the cubicle

Size Grouping Blanking covers

with vent slots Example

Summation current of

the group ≤ 400 A

100 mm blanking cover

below 1) the group

Nominal

current

fuse:

80 A

125 A

250 A

Total:

Operating

current:

64 A

100 A

200 A

364 A

2Not permissible 50 mm blanking cover below 1)

the in-line unit

Nominal

current

fuse:

400 A

Operating

current:

320 A

Not permissible

Operating current < 440 A

50 mm blanking cover above

and

100 mm blanking cover

below 1) the in-line unit

Nominal

current

fuse:

500 A

Operating

current:

400 A

Not permissible

Operating current

from 440 A to 500 A

100 mm blanking cover each

above and below 1) the in-line

unit

Nominal

current

fuse:

630 A

Operating

current:

500 A

1) Below the bottommost in-line unit, only 50 mm blanking cover instead of 100 mm blanking cover or no blanking cover instead of 50 mm blanking cover required

In-line unit size 00 / 1

In-line unit

In-line unit size 00 / 1

In-line unit size 2

In-line unit

In-line unit size 3

In-line unit

In-line unit size 3

In-line unit

SIVACON S8 Planning Principles – In-line design, plug-in

5.2 In-line switch-disconnectors

SASIL plus with fuses

Cubicles with pluggable in-line switch-disconnectors can

also be equipped with SASIL plus in-line units (Fig. 5/3)

produced by Jean Müller.

Rating data of the vertical distribution busbar SASIL

plus

The vertical distribution busbars with the phase conductors

L1, L2, L3 are arranged at the back of the cubicle. The PE, N

or PEN busbars are arranged in the cable connection com-

partment. In the case of 4-pole feeders, the N conductor is

allocated to the phase conductors L1, L2, L3 at the back of

the cubicle. The vertical distribution busbar is covered test

finger proofed (IP2X). The rated data are stated in Tab. 5/8.

Rating data of the SASIL plus cable feeders

Apart from the space requirements for additional built-in

elements (Tab. 5/9), the derating factor stated in Tab. 5/10

is to be set for determining the permissible operating

current of a fuse link. The space requirements for the cable

feeders of the different in-line units depend on the nominal

device current (Tab. 5/11).

Distribution busbar cross section 60 x 10 mm280 x 10 mm2

Rated current at 35 °C ambient

temperature 1,560 A 2,100 A

Rated short-time withstand

current Icw (1 sec) 1) 50 kA 50 kA

1) Rated conditional short-circuit current Icc = 100 kA

Tab. 5/8: Rating data of the vertical distribution busbar SASIL plus

Fig. 5/3: Pluggable in-line switch-disconnectors SASIL plus

Built-in elements Height in mm Version

Blanking cover for

empty slots

50, 75, 150,

300 Metal

Device compartment

(mounting

plate with

compartment door)

150, 200, 300,

450, 600

Without power tapping,

usable overall device

depth 180 mm

200, 300, 450,

600

With power tapping,

usable overall device

depth 180 mm

Tab. 5/9: Additional built-in elements for SASIL plus

Tab. 5/10: Derating factors for SASIL plus fuse links

Size Nominal device

current

Space requirements of the in-line unit (height) 1)

Rated current 1)

at 35 °C ambient temperature

3-pole 4-pole

00 160 A 50 mm 100 mm 122 A

1 250 A 75 mm 150 mm 203 A

2 400 A 150 mm 300 mm 324 A

3 630 A 150 mm 300 mm 510 A

1) Rated current with fuse link = nominal device current

The conﬁguration rules stated in the following are to be observed

Tab. 5/11: Rating data of the SASIL plus cable feeders

Nominal current of fuse link Derating factor F

In ≤ 32 A 1

32 A < In ≤ 160 A 0.76

160 A < In ≤ 630 A 0.81

54 SIVACON S8 Planning Principles – In-line design, plug-in

Tab. 5/12: Conversion factors for different ambient temperatures

All data refer to an ambient temperature of the switchgear

of 35 °C on 24 h average. Conversion factors for different

ambient temperatures are stated in Tab. 5/12.

Rating data and arrangement notes for the configuration of

in-line units and covers are given in Tab. 5/13. The in-line

switch-disconnectors are arranged in the cubicle either in

groups or individually in decreasing order from size 3 to

size 00. Blanking covers with vent slots are mounted in

between for ventilation.

Configuration rules

For the completely equipped cubicle, the RDF in accordance

with IEC 61439-2 applies. Non-observance of these notes

might result in premature ageing of fuses and their uncon-

trolled tripping due to local overheating. The permissible

operating current of all in-line units in the cubicle is limited

by the rated current of the vertical distribution busbar.

Ambient temperature of the

switchgear 20 °C 25 °C 30 °C 35 °C 40 °C 45 °C 50 °C 55 °C

Conversion factor 1.10 1.07 1.04 1.00 0.96 0.93 0.89 0.85

Tab. 5/13: Conﬁguration rules for SASIL plus: arrangement of the in-line units in the cubicle

Size Grouping Blanking covers 75 mm

with vent slots Example

00 Summation current of

the group ≤ 319 A

One blanking cover each above

and below 1) the group

Nominal

current

fuse:

80 A

100 A

160 A

Total:

Operating

current:

60 A

76 A

122 A

256 A

1Summation current of

the group ≤ 365 A

One blanking cover each above

and below 1) the group

Nominal

current

fuse:

250 A

Total:

Operating

current:

182 A

364 A

2Not permissible One blanking cover each above

and below 1) the group

Nominal

current

fuse:

355 A

Operating

current:

288 A

3Not permissible Two blanking covers each

above and below 1) the group

Nominal

current

fuse:

630 A

Operating

current:

510 A

1) Below the bottommost in-line unit, only 75 mm blanking cover instead of 150 mm blanking cover or no blanking cover instead of 75 mm blanking cover required

In-line unit size 00

In-line unit

In-line unit size 00

In-line unit size 1

In-line unit

In-line unit size 1

In-line unit size 2

In-line unit

In-line unit size 3

In-line unit

Chapter 6

Cubicles in ﬁxed-mounted design

6.1 In-line design, ﬁxed-mounted 56

6.2 Fixed-mounted design

with front cover 59

6.3 Cubicle for customized solutions 63

56 SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

If the exchange of components under operating conditions

is not required or if short downtimes are acceptable, then

the fixed-mounted design offers a safe and cost-efficient

solution.

6 Cubicles in ﬁxed-mounted design

6.1 In-line design, ﬁxed-mounted

The cubicles for cable feeders in fixed-mounted design up

to 630 A are equipped with vertically installed fuse

switch-disconnectors 3NJ4 (Fig. 6/1). The cubicles are

available with rear busbar position. Due to their compact

and modular design, they allow optimal cost-efficient

applications in the infrastructure sector. Design-verified

standard modules guarantee maximum safety.

Dependent on the cubicle width, multiple switch-discon-

nectors of size 00 to 3 can be installed. For the installation

of additional auxiliary devices, standard rails, wiring ducts,

terminal blocks etc., a device support plate can be provided

in the cubicle. Alternatively, it is possible to install an

ALPHA small distribution board. Measuring instruments and

control elements are installed in the door.

Fig. 6/1: Cubicles for ﬁxed-mounted in-line design with 3NJ4 in-line switch-disconnectors

SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

Tab. 6/1: General cubicle characteristics for ﬁxed-mounted in-line design

Application

range

- Incoming feeders up to 630 A

- Outgoing cable feeders up to 630 A

Degrees of protection

- Up to IP31 Ventilated, door with cut-out

- Up to IP43 Ventilated

- IP54 Non-ventilated

Cubicle dimensions - Cubicle height 2,000, 2,200 mm

- Cubicle width (front connection in the cubicle) 600, 800, 1,000 mm

Device compartment

- If cubicle width 600 mm Device compartment width 500 mm

- If cubicle width 800 mm Device compartment width 700 mm

- If cubicle width 1,000 mm Device compartment width 900 mm

Form of internal separation - Form 1b, 2b Door, cubicle high

Design options

- In-line fuse switch-disconnectors 3NJ4 (3-pole)

- With or without current measurement

- Empty slot cover

Tab. 6/2: Rating data of the 3NJ4 cable feeders

General cubicle characteristics

Tab. 6/1 summarizes the general cubicle characteristics.

The switch-disconnectors are fixed-mounted on the hori-

zontal busbar system. Cable connection is effected directly

on the device front. The maximum cable cross sections that

can be connected are stated in the device catalogue. The

cables can be led into the cubicle from top or bottom.

The switch-disconnectors can be equipped with up to three

current transformers to enable feeder-related measure-

ments. In order to implement cubicle-related summation

current measurements, the system provides the option to

install current transformers in the busbar system.

Rating data of the cable feeders

Tab. 6/2 states the space requirements and the respective

rated current dependent on the in-line unit type.

Type Nominal device

current

Space requirements of the in-

line unit

Rated current 1)

at 35 °C ambient temperature

Non-ventilated Ventilated

3NJ410 160 A 50 mm 117 A 136 A

3NJ412 250 A 100 mm 200 A 220 A

3NJ413 400 A 100 mm 290 A 340 A

3NJ414 630 A 100 mm 380 A 460 A

1) Rated current with fuse link = nominal device current

58 SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

Equipment rules for 3NJ4 in-line fuse switch-

disconnectors

Arrangement options for the in-line units in the cubicle:

• From left to right with in-line units decreasing in size

• From right to left with in-line units decreasing in size

The specified rated currents are applicable when the 3NJ4

in-line units are equipped with the largest possible fuse

links. When using smaller links, a corresponding utilization

(in percent) is permissible.

Busbar position Cable connection

Additional built-in

element installed

in the cubicle

Bottom Bottom Top

Top Top Bottom

Bottom Top Not possible

Top Bottom Not possible

Tab. 6/3: Dimensions if additional built-in elements are used

Additional built-in elements

If the busbar and cable connection positions in the cubicle

are identical, one of three possible additional built-in

elements (see Tab. 6/3) can be used. The possible arrange-

ments are listed in Tab. 6/4.

Device holder

Installation

depth 370 mm

Installation

height

625 mm (

cubicle height 2,000 mm)

725 mm (

cubicle height 2,200 mm)

ALPHA 8GK rapid

mounting kit for series-

mounted devices

Height 450 mm (3 rows)

2nd row in-line unit

size 00 Data stated in Tab. 6/5 or Tab. 6/6

Tab. 6/4: Mounting location of additional built-in elements

Cubicle width Width of device compartment

600 mm 300 mm

800 mm 500 mm

1,000 mm 700 mm

Tab. 6/5: Device compartment for in-line units in the 2nd row

Additional built-in elements for in-line units of size 00 in

2nd row

Mounting additional built-in elements for 3NJ4 in-line units

of size 00 is possible for cubicles up to degree of protection

IP31 and operation of the main in-line switch-disconnectors

through the door (door with cutout).

The additional in-line switch-disconnectors are operated

behind the door. This arrangement results in a smaller

width of the device compartment (Tab. 6/5). The rated data

of the cable feeders are stated in Tab. 6/6. The connection

is established directly at the switching device from top or

bottom. Due to the restricted connection compartment,

connections with cable cross sections up to 95 mm² are

possible.

Type

Nominal

device

current

Space

requirements

in-line unit

Max.

number

in-line

units

per

cubicle

Rated

current 1)

at 35 °C

ambient

temperature

Installation at the top in the cubicle

3NJ410 160 A 50 mm 10 95 A

14 74 A

Installation at the bottom in the cubicle

3NJ410 160 A 50 mm 10 107 A

14 92 A

1) Rated current with fuse link = nominal device current

Tab. 6/6: Rating data of the cable feeders for in-line units in the 2nd

row

Example:

• 3NJ414 in-line unit in a non-ventilated cubicle

(Tab. 6/2: 380 A)

• Equipped with 500 A link

Max. permissible continuous operational current =

= (380 A / 630 A) x 500 A = 300 A

SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

6.2 Fixed-mounted design with

front cover

The front covers, which are easy to install, allow for the

implementation of cubicles with uniform front surfaces

(Fig. 6/2). Optionally a glass door can be used. The profile

bar design or flat copper design of the distribution busbar

allows tapping in the smallest grids. Furthermore, connec-

tions to the distribution busbars by means of cables, wires

or busbars are possible without any need of drilling or

punching. This ensures maximum flexibility also for later

expansions.

General cubicle characteristics

Tab. 6/7 summarizes the general cubicle characteristics.

The switching devices are installed on modular device

holders of graduated depth. These can be equipped with

circuit-breakers, switch-disconnectors with fuses or modu-

lar installation devices. Different switching device group-

ings into one module are also possible. Modules are at-

tached to the device holder and directly connected to the

cubicle busbar.

To the front, the devices are equipped with front covers.

Operation is effected through the cover. The cable connec-

tion is effected at the device or, in cases of higher require-

ments, at special connection terminals. For individual

expansion, the system offers freely assignable device

holders.

Tab. 6/7: General cubicle characteristics for ﬁxed-mounted cubicles with front cover

Application range

- Incoming feeders up to 630 A

- Outgoing cable feeders up to 630 A

- Modular installation devices

Degrees of protection - Up to IP43 Ventilated

- IP54 Non-ventilated

Cubicle dimensions - Cubicle height 2,000, 2,200 mm

- Cubicle width (front connection in the cubicle) 1,000, 1,200 mm

Device compartment - Height 1,600, 1,800 mm

- Width 600 mm

Form of internal separation - Form 1, 2b, 3b, 4a, 4b Door,

viewing door cubicle high 1)

Design options

- Fixed-mounted module with front cover

- Mounting kit for modular installation devices

- Empty slot, device compartment

1) Cubicle with degree of protection less than or equal to IP31 is also possible without an additional cubicle high door

Fig. 6/2: Cubicles for ﬁxed mounting with front cover

60 SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

Fig. 6/3: Installation of switching devices in ﬁxed-mounted cubicles with a front cover (cover opened)

Vertical distribution busbar

The vertical distribution busbars with the phase conductors

L1, L2, L3 are arranged at the left in the cubicle. The PE, N

or PEN busbars are arranged in the cable connection com-

partment.

In the case of 4-pole feeders, the N conductor is allocated

to the phase conductors L1, L2, L3 at the back of the cubi-

cle. Ratings are stated in Tab. 6/8.

Distribution busbar Proﬁle bar Flat copper 1)

Cross section 400 mm2650 mm21 x (40 mm x 10 mm) 2 x (40 mm x 10 mm)

Rated current at 35 °C ambient

temperature

Ventilated 905 A 1,100 A 865 A 1,120 A

Non-

ventilated 830 A 1,000 A 820 A 1,000 A

Rated short-time withstand

current Icw (1 sec) 2) 65 kA 65 kA 65 kA 65 kA

1) Top main busbar position

2) Rated conditional short-circuit current Icc = 150 kA

Tab. 6/8: Rating data of the vertical distribution busbar

Mounting

One or multiple switching device(s) is/are mounted on

device holders of graduated depth and connected to the

vertical distribution busbars with the incoming feeder side

(Fig. 6/3). To the front, the devices are equipped with front

covers. Operation is effected through the cover.

Cable connection

For form 1, 2b and 4a, the cable connection is effected

directly at the switching device. The maximum cross sec-

tions that can be connected are stated in the device cata-

logues.

For form 4b, the cable connection is effected in the cable

connection compartment. Tab. 6/9 states the maximum

conductor cross sections and Fig. 6/4 shows a detail with

connections.

Nominal feeder current Max. conductor cross section

≤ 250 A 120 mm2

> 250 A 240 mm2

Tab. 6/9: Conductor cross sections in ﬁxed-mounted cubicles with

a front door

Fig. 6/4: Cable connections in ﬁxed-mounted cubicles with a front

cover

SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

Tab. 6/10: Rating data of the cable feeders for fuse-switch-

disconnectors and switch-disconnectors with fuses

Rating data of the cable feeders

Tab. 6/10 and Tab. 6/11 states the installation data of the

switching devices if used in fixed-mounted cubicles with a

front door. The thermal interaction of the outgoing feeders

in the cubicle has to be and is considered by specifying the

rated diversity factor (RDF):

Permissible continuous operational current (cable feeder) =

= rated current Inc x RDF

Type Nominal

device current

Number

per row Module height Rated current Inc

at 35 °C ambient temperature

3-pole / 4-pole 3-pole 4-pole Non-ventilated Ventilated

Fuse switch-disconnectors 1)

3NP1123 160 A 1 150 mm - 106 A 120 A

3NP1123 160 A 4 300 mm - 106 A 120 A

3NP1133 160 A 1 200 mm - 123 A 133 A

3NP1133 160 A 3 300 mm - 123 A 133 A

3NP1143 250 A 1 250 mm - 222 A 241 A

3NP1153 400 A 1 300 mm - 350 A 375 A

3NP1163 630 A 1 300 mm - 480 A 530 A

3NP4010 160 A 1 150 mm - 84 A 96 A

3NP4010 160 A 4 300 mm - 84 A 96 A

3NP4070 160 A 1 200 mm - 130 A 142 A

3NP4070 160 A 3 300 mm - 130 A 142 A

3NP4270 250 A 1 250 mm - 248 A 250 A

3NP4370 400 A 1 300 mm - 355 A 370 A

3NP4470 630 A 1 300 mm - 480 A 515 A

3NP5060 160 A 1 200 mm - 84 A 96 A

3NP5060 160 A 3 350 mm - 84 A 96 A

3NP5260 250 A 1 250 mm - 248 A 250 A

3NP5360 400 A 1 300 mm - 355 A 370 A

3NP5460 630 A 1 300 mm - 480 A 515 A

Switch-disconnectors with fuses 1)

3KL50 63 A 1 250 mm 250 mm 61 A 63 A

3KL52 125 A 1 250 mm 250 mm 120 A 125 A

3KL53 160 A 1 250 mm 250 mm 136 A 143 A

3KL55 250 A 1 350 mm 350 mm 250 A 250 A

3KL57 400 A 1 350 mm 350 mm 345 A 355 A

3KL61 630 A 1 550 mm 550 mm 535 A 555 A

1) Rated current with fuse link = nominal device current

For the outgoing feeders in the cubicle, the rated diversity

factor RDF = 0.8 can be applied:

• regardless of the number of feeders in the cubicle

• regardless of the mounting position in the cubicle

For cubicles with a very high packing and/or power density,

a project-specific assessment is recommended. More

detailed information is available via your Siemens contact.

62 SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

Installation

width

Number

of rows

Distance

between

rows

Module height

24 HP 1)

1150 mm 150 mm

200 mm 200 mm

2150 mm 300 mm

200 mm 400 mm

3150 mm 450 mm

200 mm 600 mm

1) HP = horizontal pitch = 18 mm

Device compartments

The device compartment consists of a fixed device holder

with a uniform usable overall depth of 310 mm. The device

compartment is closed with a front cover. The five typical

module heights are: 200, 300, 400, 500 and 600 mm.

Tab. 6/11: Rating data of the cable feeders for circuit-breakers

Fig. 6/5: Mounting kit for modular installation devices (without

cover)

Mounting kits for modular installation devices

Thanks to the different mounting kits, one or more row(s)

of modular installation devices can be installed in the

switchboard. Tab. 6/12 states the configurations dependent

on the module height. The mounting kit (Fig. 6/5) com-

prises the 35 mm multi-profile rails for the mounting of

modular installation devices of size 1, 2 or 3 in accordance

with DIN 43880 and a front cover. The multi-profile rail

allows the SIKclip 5ST25 wiring system to be snapped on at

the back.

Type Nominal

device current

Number

per row Module height Rated current Inc

at 35 °C ambient temperature

3-pole / 4-pole 3-pole 4-pole Non-ventilated Ventilated

Circuit-breakers

3RV2.1 16 A 1 16 mm - 12.7 A 14.1 A

3RV2.1 16 A 9 16 mm - 12.7 A 14.1 A

3RV2.2 40 A 1 40 mm - 27 A 31.5 A

3RV2.2 40 A 9 40 mm - 27 A 31.5 A

3RV2.3 52 A 1 150 mm - 39 A 40.5 A

3RV2.3 52 A 7 250 mm - 39 A 40.5 A

3RV1.4 100 A 1 150 mm - 71 A 79 A

3RV1.4 100 A 6 300 mm - 71 A 79 A

3VL1 160 A 1 150 mm 200 mm 121 A 151 A

3VL1 160 A 4 / 3 350 mm 450 mm 121 A 151 A

3VL2 160 A 1 150 mm 200 mm 130 A 158 A

3VL2 160 A 4 / 3 350 mm 450 mm 130 A 158 A

3VL3 250 A 1 200 mm 250 mm 248 A 250 A

3VL4 400 A 1 250 mm 300 mm 400 A 400 A

3VL5 630 A 1 300 mm 350 mm 525 A 565 A

3VA10 100 A 1 150 mm 150 mm 72 A 85 A

3VA10 100 A 5 / 4 400 mm 400 mm 72 A 85 A

3VA11 160 A 1 150 mm 150 mm 112 A 125 A

3VA11 160 A 5 / 4 400 mm 400 mm 112 A 125 A

3VA12 250 A 1 200 mm 250 mm 232 A 246 A

3VA20 100 A 1 150 mm 200 mm 100 A 100 A

3VA20 100 A 4 / 3 350 mm 350 mm 83 A 100 A

3VA21 160 A 1 150 mm 200 mm 160 A 160 A

3VA21 160 A 4 / 3 350 mm 350 mm 90 A 125 A

3VA22 250 A 1 200 mm 250 mm 201 A 226 A

3VA23 400 A 1 250 mm 300 mm 350 A 400 A

3VA24 630 A 1 250 mm 300 mm 410 A 495 A

Tab. 6/12: Conﬁguration data of the mounting kits for modular

installation devices

SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

6.3 Cubicle for customized

solutions

For individual configuration and flexible expansion of

cubicles, additional cubicles for customized solutions are

available for SIVACON S8 switchgear (Fig. 6/6). Their gen-

eral characteristics are stated in Tab. 6/13 and the configu-

ration data are described in Tab. 6/14.

Tab. 6/13: General characteristics for cubicles for customized solutions

Application

range

- Fixed-mounted cubicle with mounting plate for individual conﬁguration

- Use as cubicle expansion 1)

Degrees of protection - Up to IP43 Ventilated

- IP54 Non-ventilated

Cubicle dimensions - Cubicle height 2,000, 2,200 mm

- Cubicle width (front connection in the cubicle) see Tab. 6/14 (cubicle design)

Device compartment - Height 1,600, 1,800 mm

- Width see Tab. 6/14 (cubicle design)

Form of internal separation - Form 1, 2b Door,

viewing door cubicle high

Design options

- Mounting plate

- ALPHA 8GK rapid mounting kits 2)

- With / without main busbar

- With / without vertical distribution busbar

1) Expansion of cubicles to the left or right

2) Cubicle height 2,000 mm, rear main busbar position

Fig. 6/6: Cubicles for customized solutions

64 SIVACON S8 Planning Principles – Cubicles in fixed-mounted design

Vertical distribution busbar

The vertical distribution busbars with the phase conductors

L1, L2, L3 are arranged at the left in the cubicle. The PE, N

or PEN busbars are arranged in the cable connection com-

Tab. 6/14: Conﬁguration data on cubicle design for customized solutions

Cubicle design

Cubicle width Width of device

compartment

Cable connection

compartment

Vertical distribution

busbar

1,000 mm 1) (600 mm +400 mm),

1,200 mm 1) (600 mm + 600 mm) 600 mm Right Yes / No

200 mm 2), 350 mm 3), 400 mm, 600 mm,

800 mm, 850 mm 3), 1,000 mm

Corresponding to the cubicle

width Without No

600 mm 4) 600 mm Rear Yes / No

1) Front connection in the cubicle

2) Width 200 mm as cubicle expansion

3) Cubicle height 2,000 mm, single-front systems

4) Rear connection in the cubicle

partment. In the case of 4-pole feeders, the N conductor is

allocated to the phase conductors L1, L2, L3 at the back of

the cubicle. Ratings are stated in Tab. 6/15.

Distribution busbar Proﬁle bar Flat copper 1)

Cross section 400 mm2650 mm21 x (40 mm x 10 mm) 2 x (40 mm x 10 mm)

Rated current at 35 °C ambient

temperature

Ventilated 905 A 1,100 A 865 A 1,120 A

Non-

ventilated 830 A 1,000 A 820 A 1,000 A

Rated short-time withstand

current Icw (1 sec) 2) 65 kA 65 kA 65 kA 65 kA

1) Top main busbar position

2) Rated conditional short-circuit current Icc = 150 kA

Tab. 6/15: Rating data of the vertical distribution busbar

Mounting plates

Cubicle height Main busbar Overall height of mounting plate Version

2,000 mm No 1,600 mm

- Separated / unseparated

- Perforated / non-perforated

Yes 1,800 mm

2,200 mm No 2,000 mm

Yes 1,800 mm

ALPHA 8GK rapid mounting kits

Cubicle height Main busbar Compartment

Height Width

2,000 mm Without 1,800 mm 350 1), 600, 800 mm

Rear position 1,650 mm

1) No viewing door

Tab. 6/16: Conﬁguration data on mounting options for customized solutions

Mounting options

The dimensions and arrangement options for mounting

plates and ALPHA 8GK rapid mounting kits are stated in

Tab. 6/16.

More detailed information on the ALPHA 8GK rapid mount-

ing kits is available in the relevant product catalogues.

Chapter 7

Reactive power compensation

7.1 Conﬁguration and calculation 68

7.2 Separately installed compensation

cubicles 70

66 SIVACON S8 Planning Principles – Reactive power compensation

module for electronic reactive power compensation can be

installed in the door. Tab. 7/1 summarizes the general

cubicle characteristics.

The cubicles for reactive power compensation (Fig. 7/1)

relieve transformers and cables, reduce transmission losses

and thus save energy. Dependent on the consumer struc-

ture, reactive power compensation is equipped with

non-choked or choked capacitor modules. The controller

7 Reactive power compensation

Tab. 7/1: General characteristics of cubicles for reactive power compensation

Application range - Controlled reactive power compensation

Degrees of protection - Up to IP43 Ventilated

Cubicle dimensions - Cubicle height 2,000, 2,200 mm

- Width 800 mm

Device compartment - Height 1,600, 1,800 mm

- Width 600 mm

Form of internal separation - Form 1, 2b Door, cubicle high

Design options

- Non-choked

- Choked 5.67 %, 7 %, 14 %

- With / without main busbar

- With connection to main busbar or with external connection

- With / without line-side switch-disconnector module as cut-off point between main busbars

and vertical distribution bar

Fig. 7/1: Cubicle for reactive power compensation

SIVACON S8 Planning Principles – Reactive power compensation

Compensation modules

Dependent on the consumer type, non-choked and choked

capacitor modules are used for reactive power compensa-

tion. A module with fuse switch-disconnectors can option-

ally be installed to disconnect the capacitor modules (Fig.

7/2) from the main busbar.

• Non-choked capacitor modules

Non-choked modules are mainly used for central compen-

sation of reactive power with mainly linear consumers.

They are divided into several, separately switchable

capacitor modules. The reactive power controller installed

in the door enables adhering to the specified set cos j

even under varying load conditions.

• Choked capacitor modules

Choked modules have an additional inductance. They are

used for compensating reactive power in networks with

non-linear loads (15 - 20 % of the total load) and a high

harmonic component. In addition to capacitive reactive

power, choked modules also provide filtering of low-fre-

quency harmonics.

Audio frequency ripple control systems and

compensation

Ripple control signals can be used in the power supply

network to control power consumers remotely. The signals

for audio frequency ripple control systems (AF) are in the

range of 110 and 2,000 Hz. The dependency of the choking

level from the audio frequency suppressor is listed in

Tab. 7/2.

Using an audio frequency suppressor is required to prevent

suppressing ripple control signals from the network. The

audio frequency suppressor depends on the frequency of

the ripple control signal of the respective network operator

and must be adjusted if required. Special variants are

available on request.

Choking rate Audio frequency suppressor

5.67 % > 350 Hz

7 % > 250 Hz

14 % > 160 Hz

Tab. 7/2: Choked capacitor modules with built-in audio frequency

suppressor

Fig. 7/2: Capacitor modules for reactive power compensation

68 SIVACON S8 Planning Principles – Reactive power compensation

Tab. 7/3: Conﬁguration of capacitor modules

Cubicle

height

Compensation

power per cubicle

Number of

modules

Type

Non-choked Choked 5.67 %, 7 %, 14 % 1)

Without switch-

disconnector

With switch-

disconnector

Rear busbar

position

Top busbar

position

Reactive power per cubicle: 600 kvar / 400 V / 50 Hz at 35 °C ambient temperature

2,200 mm 600 kvar 12 x 50 kvar + - - -

Cubicle power: up to 500 kvar / 400 V, 525 V, 690 V / 50 Hz at 35 °C ambient temperature

2,000 mm,

2,200 mm

50 kvar 2 x 25 kvar + + + +

100 kvar 4 x 25 kvar + + + +

150 kvar 6 x 25 kvar + + + +

200 kvar 4 x 50 kvar + + + +

250 kvar 5 x 50 kvar + + + +

300 kvar 6 x 50 kvar + + + +

350 kvar 7 x 50 kvar + - + +

400 kvar 8 x 50 kvar + - + + 2)

2,200 mm

400 kvar 8 x 50 kvar + + + + 2)

450 kvar 9 x 50 kvar + - + 2) -

500 kvar 10 x 50 kvar + - + 2) -

1) 14 % choked only possible for 400 V

2) Can only be implemented with degree of protection IP30 / IP31

Legend:

+ possible

- not possible

7.1 Conﬁguration and calculation

When cubicles with direct connection to the main busbar

are configured, the selection of capacitor modules depends

on the total power in this cubicle and the number of mod-

ules, as it becomes apparent in Tab. 7/3.

When calculating the required compensation power, you

can proceed as follows:

1. The electricity bill of the power supplier shows the

consumption of active energy in kWh and reactive energy

in kvarh. The distribution system operator (DSO) usually

requires a cos φ between 0.90 and 0.95. To avoid costs, the

value should be compensated to a cos φ near 1. Where

tan φ = reactive energy / active energy

2. From Tab. 7/4 the conversion factor F must be deter-

mined by compensation in dependency of the original

value for tan φ1 (row) and the desired cos φ2 (column).

3. The compensation power required is the product of the

conversion factor F and the mean active power consump-

tion Pm

Compensation power Pcomp = F x Pm

Example:

Reactive energy Wb = 61.600 kvarh per month

Active energy Ww = 54.000 kWh per month

tan φ1 = Wb / Ww = 1.14 (cos φ1 = 0.66)

Mean power consumption Pm

Pm = active energy / working time

= 54,000 kWh / 720 h

= 75 kW

Desired power factor cos φ2 = 0.95

Conversion factor F (tan φ1 = 1.14; cos φ2 = 0.95)

F = 0.81

Compensation power Pcomp = F x Pm = 0.81 x 75 kW

Pcomp = 60 kvar

SIVACON S8 Planning Principles – Reactive power compensation

Actual value

given Conversion factor F

tan j1cos j1

cos j2 =

0.70

cos j2 =

0.75

cos j2 =

0.80

cos j2 =

0.82

cos j2 =

0.85

cos j2 =

0.87

cos j2 =

0.90

cos j2 =

0.92

cos j2 =

0.95

cos j2 =

0.97

cos j2 =

1.00

4.9 0.20 3.88 4.02 4.15 4.20 4.28 4.33 4.41 4.47 4.57 4.65 4.90

3.87 0.25 2.85 2.99 3.12 3.17 3.25 3.31 3.39 3.45 3.54 3.62 3.87

3.18 0.30 2.16 2.30 2.43 2.48 2.56 2.61 2.70 2.75 2.85 2.93 3.18

2.68 0.35 1.66 1.79 1.93 1.98 2.06 2.11 2.19 2.25 2.35 2.43 2.68

2.29 0.40 1.27 1.41 1.54 1.59 1.67 1.72 1.81 1.87 1.96 2.04 2.29

2.16 0.42 1.14 1.28 1.41 1.46 1.54 1.59 1.68 1.74 1.83 1.91 2.16

2.04 0.44 1.02 1.16 1.29 1.34 1.42 1.47 1.56 1.62 1.71 1.79 2.04

1.93 0.46 0.91 1.05 1.18 1.23 1.31 1.36 1.45 1.50 1.60 1.68 1.93

1.83 0.48 0.81 0.95 1.08 1.13 1.21 1.26 1.34 1.40 1.50 1.58 1.83

1.73 0.50 0.71 0.85 0.98 1.03 1.11 1.17 1.25 1.31 1.40 1.48 1.73

1.64 0.52 0.62 0.76 0.89 0.94 1.02 1.08 1.16 1.22 1.31 1.39 1.64

1.56 0.54 0.54 0.68 0.81 0.86 0.94 0.99 1.07 1.13 1.23 1.31 1.56

1.48 0.56 0.46 0.60 0.73 0.78 0.86 0.91 1 1.05 1.15 1.23 1.48

1.40 0.58 0.38 0.52 0.65 0.71 0.78 0.84 0.92 0.98 1.08 1.15 1.40

1.33 0.60 0.31 0.45 0.58 0.64 0.71 0.77 0.85 0.91 1 1.08 1.33

1.27 0.62 0.25 0.38 0.52 0.57 0.65 0.70 0.78 0.84 0.94 1.01 1.27

1.20 0.64 0.18 0.32 0.45 0.50 0.58 0.63 0.72 0.77 0.87 0.95 1.20

1.14 0.66 0.12 0.26 0.39 0.44 0.52 0.57 0.65 0.71 0.81 0.89 1.14

1.08 0.68 0.06 0.20 0.33 0.38 0.46 0.51 0.59 0.65 0.75 0.83 1.08

1.02 0.70 – 0.14 0.27 0.32 0.40 0.45 0.54 0.59 0.69 0.77 1.02

0.96 0.72 0.08 0.21 0.27 0.34 0.40 0.48 0.54 0.63 0.71 0.96

0.91 0.74 0.03 0.16 0.21 0.29 0.34 0.42 0.48 0.58 0.66 0.91

0.86 0.76 – 0.11 0.16 0.24 0.29 0.37 0.43 0.53 0.60 0.86

0.80 0.78 0.05 0.1 0.18 0.24 0.32 0.38 0.47 0.55 0.80

0.75 0.8 – 0.05 0.13 0.18 0.27 0.32 0.42 0.50 0.75

0.70 0.82 – 0.08 0.13 0.21 0.27 0.37 0.45 0.70

0.65 0.84 0.03 0.08 0.16 0.22 0.32 0.40 0.65

0.59 0.86 – 0.03 0.11 0.17 0.26 0.34 0.59

0.54 0.88 – 0.06 0.11 0.21 0.29 0.54

0.48 0.9 – 0.06 0.16 0.23 0.48

0.43 0.92 – 0.10 0.18 0.43

0.36 0.94 0.03 0.11 0.36

0.29 0.96 – 0.01 0.29

0.20 0.98 – 0.20

Tab. 7/4: Conversion factors F for phase angle adjustments

70 SIVACON S8 Planning Principles – Reactive power compensation

fuse and connecting cable must be factored in. For their

configuration data, please refer to Tab. 7/5.

Reactive

power

per cubicle

Nominal voltage 400 V AC / 50 Hz Nominal voltage 525 V AC / 50 Hz Nominal voltage 690 V AC / 50 Hz

Rated current

Fuse

per phase

L1, L2, L3

Cable cross

section

per phase

L1, L2, L3

Rated

current

Fuse

per phase

L1, L2, L3

Cable cross

section

per phase

L1, L2, L3

Rated

current

Fuse

per phase

L1, L2, L3

Cable cross

section

per phase

L1, L2, L3

Up to

21 kvar 30.3 A 35 A 10 mm2- - - - - -

25 kvar 36.1 A 63 A 16 mm227.5 A 50 A 10 mm220.9 A 50 A 10 mm2

30 kvar 43.3 A 63 A 16 mm2- - - - - -

35 kvar 50.5 A 80 A 25 mm2- - - - - -

40 kvar 57.7 A 100 A 35 mm2- - - - - -

45 kvar 64.9 A 100 A 35 mm2- - - - - -

50 kvar 72.2 A 100 A 35 mm254.9 A 100 A 35 mm241.8 A 63 A 16 mm2

60 kvar 86.6 A 160 A 70 mm2- - - - - -

70 kvar 101 A 160 A 70 mm2- - - - - -

75 kvar 108 A 160 A 70 mm282.5 A 125 A 35 mm262.7 A 100 A 25 mm2

80 kvar 115 A 200 A 95 mm2- - - - - -

100 kvar 144 A 250 A 120 mm2110 A 200 A 95 mm283.6 A 125 A 35 mm2

125 kvar 180 A 300 A 150 mm2137 A 200 A 95 mm2105 A 160 A 70 mm2

150 kvar 217 A 355 A 2 x 70 mm2165 A 250 A 120 mm2126 A 200 A 95 mm2

160 kvar 231 A 355 A 2 x 70 mm2- - - - - -

175 kvar 253 A 400 A 2 x 95 mm2192 A 300 A 150 mm2146 A 250 A 120 mm2

200 kvar 289 A 500 A 2 x 120 mm2220 A 355 A 185 mm2167 A 250 A 150 mm2

250 kvar 361 A 630 A 2 x 150 mm2275 A 400 A 2 x 95 mm2209 A 315 A 185 mm2

300 kvar 433 A 2 x 355 A 1) 2 x 185 mm2330 A 500 A 2 x 120 mm2251 A 400 A 2 x 95 mm2

350 kvar 505 A 2 x 400 A 1) 4 x 95 mm2 2) 385 A 630 A 2 x 150 mm2293 A 500 A 2 x 120 mm2

400 kvar 577 A 2 x 500 A 1) 4 x 120 mm2 2) 440 A 2 x 355 A 1) 2 x 185 mm2335 A 500 A 2 x 120 mm2

450 kvar 650 A 2 x 500 A 1) 4 x 120 mm2 2) 495 A 2 x 400 A 1) 4 x 95 mm2377 A 2 x 315 A 1) 2 x 185 mm2

500 kvar 722 A 2 x 630 A 1) 4 x 150 mm2 2) 550 A 2 x 500 A 1) 4 x 120 mm2418 A 2 x 315 A 1) 2 x 185 mm2

600 kvar 866 A 2 x 630 A 1) 4 x 185 mm2 2) - - - - - -

1) For this type of protection the information plate "Caution, reverse voltage through parallel cable" is recommended. A circuit-breaker can be used to avoid the

problem with parallel fuses.

2) Connection possibility for separately installed compensation cubicles: up to 2 x 240 mm2.

Recommendation for 4 parallel cables per phase: Use separate incoming feeder cubicle and power factor correction cubicle with main busbar.

Tab. 7/5: Connecting cables and back-up fuses for separately installed

compensation cubicles

7.2 Separately installed

compensation cubicles

When compensation cubicles are configured, which are to

be installed separated from the switchboard, the back-up

Chapter 8

Further planning notes

8.1 Installation 72

8.2 Weights and power loss 76

8.3 Environmental conditions 77

72 SIVACON S8 Planning Principles – Further planning notes

supply units are increasingly used, for example in ICT

equipment in office rooms, the power factor may even

turn capacitive. In this context, it must be observed that

these power supply units frequently cause system pertur-

bations in the form of harmonics, which can be reduced

by passive or active filters.

• The decision in favour of central or distributed implemen-

tation of compensation is governed by the network

configuration (load center of reactive current sources). In

case of distributed arrangement of the compensation

systems, appropriate outgoing feeders (in-line switch-dis-

connectors, circuit-breakers etc.) shall be provided in the

switchboard.

• Generator-supplied power systems must not be com-

pensated if problems may arise in generator control as a

result of compensation control (disconnecting the com-

pensation system during switch-over to generator mode

or static, generator-tuned compensation is possible)

• Choking of a compensation system depends on the

power system requirements as well those of the client

and the DSO.

In the planning stage, installation conditions such as

clearances, width of maintenance gangways, weights,

underground, as well as environmental conditions, for

example climatic conditions, and power loss must already

be considered. In particular the following aspects should be

kept in mind when planning a switchboard:

• Maximally permitted equipment of a cubicle (for

example, number of in-line switch-disconnectors con-

sidering size and load; manufacturer specifications must

be observed!).

• Minimum cubicle width, considering component density,

conductor cross sections and number of cables (a wider

terminal compartment may have to be selected or an

additional cubicle may have to be configured)

• Device reduction factors must be observed according to

manufacturer specifications! Mounting location, ambient

temperature and nominal current play an important part

(particular attention in case of currents greater than

2,000 A!).

• The dimensioning of compensation systems is very much

governed by the location of use (office, production) and

the power supply conditions (harmonic content, DSO

specifications, audio frequency etc.). Up to about 30 % of

the transformer output can be expected as a rough

estimate (in industrial environments) in the absence of

concrete criteria for planning. If switched-mode power

8 Further planning notes

by the manufacturer must be observed (Fig. 8/1). The

minimum dimensions for operating and maintenance

8.1 Installation

Installation – clearances and gangway widths

When low-voltage switchboards are installed, the minimum

clearances between switchboards and obstacle as specified

Fig. 8/1: Clearances to obstacles

100 mm (150 mm 1)) 2) 100 mm 3)

100 mm

1) Back-to-back installation: 200 mm (300 mm 2))

2) Only for IP43 (projecting of the top plate)

3) While adding of the right cubicle, the protrusion of the main busbar connecting brackets must

be considered!

Top busbar position: protrusion 90 mm  recommended clearances > 150 mm

Rear busbar position: protrusion 54 mm  recommended clearances > 100 mm

Attention: All dimensions refer to the frame dimensions (nominal cubicle size) !

Switchboard

Leave a space of at least 400 mm above the cubicles !

Fig. 8/2: Maintenance gangway widths and passage heights

1) Minimum height of passage under covers or enclosures

2,000 mm

600 mm600 mm

700 mm700 mm700 mm700 mm

SIVACON S8 Planning Principles – Further planning notes

gangways according to IEC 60364-7-729 must be taken

into account when planning the space required (Fig. 8/2).

When using an lift truck for the insertion of circuit-breakers,

the minimum gangway widths must be matched to the

dimensions of the lift truck! Reduced gangway width

within the range of open doors must be paid attention to

(Fig. 8/3). With opposing switchboard fronts, constriction

by open doors is only accounted for on one side. SIVACON

S8 doors can be fitted so that they close in escape direc-

tion. The door stop can easily be changed later. Moreover,

the standard requires a minimum door opening angle of

90°.

Altitude

The altitude of installation must not be above 2,000 m

above sea level.

Switchboards and equipment which are to be used in

higher altitudes require that the reduction of dielectric

strength, the equipment switching capacity and the cooling

effect of the ambient air be considered. Further informa-

tion is available from your Siemens contact.

Fig. 8/3: Minimum widths of maintenance gangways in accordance

with IEC 60364-7-729

1) 2)

Escape direction

1) Circuit-breaker in

the “completely extracted and isolated” position

2) Handles (e.g. for controls or equipment)

Escape direction

1) Circuit breaker fully withdrawn

2) Door ﬁxed in open position

Escape direction

Unfolded

swivel frame

behind the door

Minimum

maintenance

gangway width

500 mm

Minimum

maintenance

gangway width

500 mm

Minimum

maintenance

gangway width

600 mm

74 SIVACON S8 Planning Principles – Further planning notes

One or more double-front units can be combined into a

transport unit. Cubicles within a transport unit have a

horizontal through-busbar. Cubicles cannot be separated.

Apart from the following exceptions, a cubicle composition

within a double-front unit is possible for all designs.

The following cubicles determine the width of the dou-

ble-front unit as cubicle (1) and should only be combined

with a cubicle for customized solutions without cubicle bus-

bar system:

• Circuit-breaker design - longitudinal coupler

• Circuit-breaker design - incoming/outgoing feeder

4,000 A, cubicle width 800 mm

• Circuit-breaker design - incoming/outgoing feeder

5,000 A

• Circuit-breaker design - incoming/outgoing feeder

6,300 A

Cubicles with a width of 350 mm or 850 mm are not pro-

vided for within double-front systems.

Single-front and double-front systems

In the single-front system, the switchboard cubicles stand

next to each other in a row (Fig. 8/4 top). One or more

cubicles can be combined into a transport unit. Cubicles

within a transport unit have a horizontal through-busbar.

Cubicles cannot be separated.

In the double-front system, the cubicles stand in a row next

to and behind one another (Fig. 8/4). Double-front systems

are only feasible with a rear busbar position. The main

feature of a double-front installation is its extremely eco-

nomical design: the branch circuits on both operating

panels are supplied by one main busbar system only.

A double-front unit consists of a minimum of two and a

maximum of four cubicles. The width of the double-front

unit is determined by the widest cubicle (1) within the

double-front unit. This cubicle can be placed at the front or

rear side of the double-front unit. Up to three more cubicles

(2), (3), (4) can be placed at the opposite side. The sum of

the cubicle widths (2) to (4) must be equal to the width of

the widest cubicle (1).

Fig. 8/4: Cubicle arrangement for single-front (top) and double-front systems (bottom)

Double-front units

Double-front installations

With main busbar

position at the rear

Single-front installations

With main busbar

position at the top

With main busbar

position at the rear

Front

connection

Rear

connection

Rear panel Door

(1)

(3)(2) (4)

(1)

(3)(2) (4)

SIVACON S8 Planning Principles – Further planning notes

Foundation frame and floor mounting

The foundation generally consists of concrete, with a cut-

out for cable or busbar entry. The cubicles are positioned

on a foundation frame made of steel girders. In addition to

the permissible deviations of the installation area (Fig. 8/5),

it must be ensured that

• The foundation is precisely aligned

• The butt joints of more than one foundation frame are

smooth

• The surface of the frame is in the same plane as the

surface of the finished floor

Two typical examples for switchboard installation are:

• Installation on a raised floor (Fig. 8/6)

• Foundation frame mounted on concrete (Fig. 8/7)

For the mounting point on the foundation frame, please

see Fig. 8/8 for single-front and Fig. 8/9 for double-front

systems. Fig. 8/10 shows dimensions of the corner cubicle.

Dimensions in mm are referred to the cubicle widths W and

cubicle depth D.

Fig. 8/10: Mounting points for the corner cubicle

350 25

350

100

B D

500 350 500

600 450 600

650 800

Holes

7 x Ø14.8

M12

Field depth

All dimensions in mm

103.6

800 / 1,200

Fig. 8/5: Permissible deviations of the installation area

1 mm / m

Fig. 8/6: Installation on raised ﬂoors

Adjustable post

Concrete floor

Floor plate,

inserted

Switchboard

Box girder of

foundation

Fig. 8/7: Foundation frame mounted on concrete

Bolt

Screed Foundation frame,

e.g. U-shaped section DIN 1026

Heavy-duty dowel

Concrete floor

Alignment shims

Fig. 8/8: Mounting points of the single-front system

A A

+2 -1

D -50

W -150

W - 50

350

Alternative to A

4 x Ø14.8

All dimensions in mm

Fig. 8/9: Mounting points of the single-front system

+2 -1

D -50

W -150

W - 50

350

Only for installations with more

stringent requirements (e.g. seismic

requirements and offshore installations)

4 holes Ø14.8

All dimensions in mm

76 SIVACON S8 Planning Principles – Further planning notes

8.2 Weights and power loss

Weight data in Tab. 8/1 is for orientation only. The same

applies to the power losses specified in Tab. 8/2. This data

represents approximate values for a cubicle with the main

circuit of functional units for determination of the power

loss to be dissipated from the switchboard room. Power

Tab. 8/1: Weights of SIVACON S8 cubicles (orientation values)

Cubicle dimensions

Nominal current Average weights of the cubicles including busbar

(without cable)

Height Width Depth

Circuit-breaker cubicles

2,200 mm

400 mm 500 mm 630 - 1,600 A 340 kg

600 mm 390 kg

600 mm 600 mm 2,000 - 3,200 A 510 kg

800 mm 545 kg

800 mm 600 mm 4,000 A 770 kg

800 mm

1,000 mm 800 mm 4,000 - 6,300 A 915 kg

Universal / ﬁxed-mounted design

2,200 mm 1,000 mm

500 mm 400 kg

600 mm 470 kg

800 mm 590 kg

In-line design, ﬁxed-mounted

2,200 mm 600 mm 600 mm 360 kg

800 mm 800 mm 470 kg

In-line design, plug-in

2,200 mm 1,000 mm

500 mm 415 kg

600 mm 440 kg

800 mm 480 kg

Reactive power compensation

2,200 mm 800 mm

500 mm 860 kg

600 mm 930 kg

800 mm 1,050 kg

losses of possibly installed additional auxiliary devices must

also be taken into consideration. Further information is

available from your Siemens contact.

Circuit-breaker design with

3WL (withdrawable unit)

Power loss (approx. value) PVCircuit-breaker design with

3VL (withdrawable unit)

Power loss (approx. value) PV

100% rated

current

80 % rated

current

100% rated

current

80 % rated

current

3WL1106 (630 A, Bg. I) 215 W 140 W 3VL630 (630 A) 330 W 210 W

3WL1108 (800 A, Bg. I) 345 W 215 W 3VL800 (800 A) 440 W 290 W

3WL1110 (1,000 A Bg. I) 540 W 345 W 3VL1250 (1,250 A) 700 W 450 W

3WL1112 (1,250 A, Bg. I) 730 W 460 W 3VL1600 (1,600 A) 1,140 W 730 W

3WL1116 (1,600 A, Bg. I) 1,000 W 640 W Fixed-mounted design PV = approx. 600 W

3WL1220 (2,000 A, Bg. II) 1,140 W 740 W In-line design, ﬁxed-mounted PV = approx. 600 W

3WL1225 (2,500 A, Bg. II) 1,890 W 1,210 W In-line design, plug-in PV = approx. 1,500 W

3WL1232 (3,200 A, Bg. II) 3,680 W 2,500 W Withdrawable-unit design PV = approx. 600 W

3WL1340 (4,000 A, Bg. III) 4,260 W 2,720 W Reactive power compensation Power loss (approx. value) PV

3WL1350 (5,000 A, Bg. III) 5,670 W 3,630 W Non-choked 1.4 W/kvar

3WL1363 (6,300 A, Bg. III) 8,150 W 5,220 W Choked 6.0 W/kvar

Tab. 8/2: Power losses of SIVACON S8 cubicles (orientation values)

SIVACON S8 Planning Principles – Further planning notes

Tab. 8/3: Normal service conditions for SIVACON S8 switchboards

Environmental

conditions Class Environmental parameters including their limit values

(Deﬁnition acc. to IEC 60721-3-3) Measures

Climatic 3K4

Low air temperature -5 °C 1),3)

High air temperature +40 °C 3)

+35 °C (24 h mean) 2),3)

Low relative humidity 5 %

High relative humidity 95 %

Examples for relation (air temperature - air humidity) at 40 °C: 50 % 3)

at 20 °C: 90 % 3)

Low absolute humidity 1 g/m3

High absolute humidity 29 g/m3

Speed of temperature change 0.5 °C min.

Low air pressure 70 kPa

High air pressure 106 kPa

Sunlight 700 W/m2

Heat radiation None

Condensation possible Install switchboard

heating

Wind-borne precipitation No

Water (except rain) See special service

conditions

Ice formation No

1) According to IEC 60721-3-3, a minimum temperature of +5 °C is permissible.

2) Higher values are permissible on request

3) Data in accordance with IEC 61439-1; any other, not identiﬁed values in accordance with IEC 60721-3-3

8.3 Environmental conditions

The climate and other external conditions (natural foreign

substances, chemically active pollutants, small animals)

may affect the switchboard to a varying extent. The influ-

ence depends on the air-conditioning equipment of the

switchboard room.

According to IEC 61439-1, environmental conditions for

low-voltage switchboards are classified as:

• Normal service conditions (IEC 61439-1,

section 7.1)

• Special service conditions (IEC 61439-1,

section 7.2)

SIVACON S8 switchboards are intended for use in the

normal environmental conditions described in Tab. 8/3.

If special service conditions prevail (Tab. 8/4), special

agreements between the switchboard manufacturer and

the user must be reached. The user must inform the switch-

board manufacturer about such extraordinary service

conditions.

Special service conditions relate to the following, for exam-

ple:

• Data about ambient temperature, relative humidity and/

or altitude if this data deviates from the normal service

conditions

• The occurrence of fast temperature and/or air pressure

changes, so that extraordinary condensation must be

expected inside the switchboard

• An atmosphere which may contain a substantial pro-

portion of dust, smoke, corrosive or radioactive com-

ponents, vapours or salt (e.g. H2S, NOx, SO2, chlorine)

The occurrence of severe concussions and impacts is con-

sidered in the section Chapter 9.3 "Seismic safety and

seismic requirements".

In case of higher concentrations of pollutants (Class > 3C2)

pollutant reducing measures are required, for example:

• Air-intake for service room from a less contaminated

point

• Expose the service room to slight excess pressure (e.g.

injecting clean air into the switchboard)

• Air conditioning of switchboard rooms (temperature

reduction, relative humidity < 60%, if necessary, use

pollutant filters)

• Reduction of temperature rise (oversizing of switching

devices or components such as busbars and distribution

bars)

Further information is available from your Siemens contact.

78 SIVACON S8 Planning Principles – Further planning notes

Environmental

conditions Class Environmental parameters including their limit values

(Deﬁnition acc. to IEC 60721-3-3) Measures

Chemically

active

substances

3C2

Sea salt Presence of salt mist

on request

Mean value Limiting value

Sulphur dioxide SO20.3 mg/m31.0 mg/m3

Hydrogen sulphide H2S 0.1 mg/m30.5 mg/m3

Chlorine Cl20.1 mg/m30.3 mg/m3

Hydrogen chloride HCl 0.1 mg/m30.5 mg/m3

Hydrogen ﬂuoride 0.01 mg/m30.03 mg/m3

Ammonia NH31.0 mg/m33.0 mg/m3

Ozone O30.05 mg/m30.1 mg/m3

Nitrogen oxides NOx0.5 mg/m31.0 mg/m3

Additional

climatic

environmental

conditions

3Z1 Heat radiation is negligible

3Z7 Dripping water in accordance with IEC 60068-2-18 IPX1

3Z9 Splashing water in accordance with IEC 60068-2-18 IPX4

3B2

Flora Presence of mould, fungus, etc. ≥ IP4X including

protection of the

cable basement

Fauna Presence of rodents and other animals

harmful to products, excluding termites

Mechanically

active

substances

3S1

Sand in air -

< IP5XDust (suspension) 0.01 mg/m3

Dust (sedimentation) 0.4 mg/(m3∙h)

3S2

Sand in air 300 mg/m3

≥ IP5XDust (suspension) 0.4 mg/m3

Dust (sedimentation) 15 mg/(m3∙h)

Conditions for transport, storage and installation

If the ambient conditions for transport, storage or switch-

board installation deviate from the normal service condi-

tions listed in Tab. 8/4 (for example an excessively low or

high value for temperature or air humidity), the measures

required for proper treatment of the switchboard must be

agreed upon between manufacturer and client.

Tab. 8/4: Special service conditions for SIVACON S8 switchboards

Chapter 9

Conforming to standards and design-

tested

9.1 The product standard IEC 61439-2 80

9.2 Arc resistance 81

9.3

Seismic safety and seismic

requirements

9.4 Declarations of conformity and

certiﬁcates 85

80 SIVACON S8 Planning Principles – Conforming to standards and design-verified

verifications are a pivotal part of quality assurance and

constitute the pre-requisite for CE marking in accordance

with EC Directives and legislation.

Verification of temperature rise

One of the most important verification procedures is the

"verification of temperature rise". In this procedure, the

switchboard's suitability for temperature rises owing to

power loss is verified. Because of ever rising current ratings

and concurrently increasing requirements of degree of

protection and internal separation, this is one of the great-

est challenges switchboards are confronted with. According

to the standard, this verification can be performed by

calculation up to a rated current of 1,600 A. For SIVACON

S8, this verification is always performed by testing. Rules

for the selection of test pieces (worse case test) and the

testing of complete assemblies ensure that the entire

product range is systematically covered and that this verifi-

cation always includes the associated devices. This means

that testing randomly selected test pieces suffices no less

than replacing a device without repeating the test.

9.1 The product standard

IEC 61439-2

Low-voltage switchboards, or "power switchgear and

controlgear assemblies" according to the standard, are

developed and manufactured according to the specifica-

tions of IEC 61439-2 and their compliance with the stand-

ard is verified. To prove the suitability of the switchboard,

this standard requires two essential types of verification –

design verification and routine verification. Design verifica-

tions are tests accompanying development, which must be

performed by the original manufacturer (designer). Routine

verifications must be performed by the manufacturer of the

power switchgear and controlgear assembly (switchboard

manufacturer) on every manufactured switchboard prior to

delivery.

Design verification test

The SIVACON S8 switchboard ensures safety for man and

machine by means of design verification (Tab. 9/1) by

testing in accordance with IEC 61439-2. Its physical proper-

ties are rated in the test area both for operating and fault

conditions and ensure maximum personal safety and

system protection. These design verifications and routine

9 Conforming to standards and design-

veriﬁed

Tab. 9/1: Test for the design veriﬁcation in accordance with IEC 61439-2

The table shows all veriﬁcations required by the standard

. They can be delivered by three alternative

possibilities.

Veriﬁcation by

testing

Veriﬁcation by

calculation

Veriﬁcation by

design

rules

1. Strength of solid matters and components ü - -

2. Degree of protection of enclosures ü-ü

3. Creepage distances and clearances üüü

4. Protection against electric shock

and integrity of protective circuits ü ü 1) ü 1)

5. Incorporating equipment - - ü

6. Internal electric circuits and connections - - ü

7. Connections for conductors entered from the outside - - ü

8. Dielectric properties ü-ü 2)

9. Temperature rise limits üup to 1,600 A up to 630 A 3)

10. Short-circuit strength üConditional 3) Conditional 3)

11. Electromagnetic compatibility (EMC) ü-ü

12. Mechanical function ü- -

1) Effectivity of the assembly in case of external faults

2) Only impulse withstand voltage

3) Comparison with an already tested design

SIVACON S8 Planning Principles – Conforming to standards and design-verified

9.2 Arc resistance

An internal arc is one of the most dangerous faults inside

switchboards with extremely serious consequences – in

particular because personal safety is affected. Internal arcs

may be caused by wrong rating, decreasing insulation,

pollution as well as handling mistakes. Their effects, caused

by high pressure and extremely high temperatures, can

have fatal consequences for the operator and the system

which may even extend to the building.

An arc-resistant assembly consists of arc-free and/or arc-re-

sistant zones. An arc-free zone is defined as part of a circuit

within the assembly where it is not possible to apply an

igniter wire without destroying the insulating material of

the conductors, in the insulated main busbar for SIVACON S8,

for example (Fig. 9/1). An arc-resistant zone is defined as

part of a circuit where an igniter wire can be applied and

which fulfils all applicable criteria for test assessment, such

as the main busbar compartment of the SIVACON S8 with

arc barriers (Fig. 9/2). If the assembly is supplied by a

transformer, an arc duration of 300 ms should be consid-

ered in order to enable disconnection by a high-voltage

protection device.

The test of low-voltage switchboards under arcing condi-

tions is a special test in accordance with IEC/TR 61641. For

SIVACON S8 low-voltage switchboards, personal safety was

verified by testing under arcing conditions.

Active and passive protective measures prevent internal

arcs and thus personal injury or limit their effects within

the switchboard:

• Insulation of live parts (e.g. busbars)

• Uniform user interfaces and displays with integrated

operating error protection

• Reliable switchboard dimensioning

• Arc-resistant hinge and lock systems

• Safe operating (moving) of withdrawable units or circuit-

breakers behind closed door

• Protective measures in air vents

• Arc barriers

• Arc detection systems combined with fast disconnection

on internal arcs

The effectivity of the measures described is proven by

countless, comprehensive arcing fault tests under "worst

case" conditions performed on a great variety of cubicle

types and functional units.

Fig. 9/1: Insulated main busbar in the SIVACON S8 (optional N

insulation)

Fig. 9/2: Arc barrier in SIVACON S8

82 SIVACON S8 Planning Principles – Conforming to standards and design-verified

The arcing concept of SIVACON S8

Siemens has developed a graded concept which comprises

the requirements of arc resistance SIVACON S8 may be

subjected to. The arc levels (Tab. 9/3) describe the limita-

tion of effects of an internal arc on the system or system

components of the SIVACON S8.

System characteristics under arcing conditions

The following data must be provided by the assembly

manufacturer:

• Rated operating voltage Ue

• Permissible short-circuit current under arcing conditions

Ip arc and the associated permissible arcing time tarc or

• Permissible conditional short-circuit current under arcing

conditions Ipc arc

Corresponding characteristics for SIVACON S8 are given in

Tab. 9/2.

In addition, to include system protection, the defined areas

(e.g. cubicle, compartment) must be given to which the

effects of the internal arc shall be limited. The properties of

current-limiting devices (e.g. current-limiting circuit-break-

ers or fuses) which are required for circuit protection must

be specified if applicable.

Assessment criteria for personal safety and system

protection

Personal safety is ensured if the following five criteria are

fulfilled:

1. Properly secured doors, covers, etc., must not open.

2. Parts (of the assembly) that are potentially hazardous

must not fly off.

3. The impact of an internal arc must not produce any holes

in the freely accessible outer parts of the enclosure as a

result of burning or other effects.

4. Vertically applied indicators must not ignite.

5. The PE circuit for parts of the enclosure that can be

touched must still be functional.

System protection is ensured if the five above-mentioned

criteria are fulfilled plus criterion 6.

6. The internal arc must be limited to a defined area and

there will be no re-ignition in adjacent areas.

Suitability for restricted continued service (additional

criterion 7):

7. Emergency operation of the assembly must be possible

after the fault has been rectified and affected functional

units were disconnected or removed. This must be verified

by an insulation test with 1.5 times the value of the rated

operating voltage for the duration of one minute.

Tab. 9/2: SIVACON S8 system characteristics under arcing

conditions

Rated operating voltage UeUp to 690 V

Prospective short-circuit current under arcing

conditions Ip,arc

Up to 100 kA

Arcing time tarc Up to 300 ms

Tab. 9/3: SIVACON S8 arc levels (system areas to which the internal

arc is limited are marked in orange)

Level 1

Personal safety

without extensive

limitation of the

arcing fault effects

within the

installation.

Level 3

Personal safety with

limitation of the arcing

fault effects to the

main busbar compart-

ment , to the device

compartment or to the

cable compartment in

one cubicle or

double-front unit.

Level 4

Personal safety

with limitation of

the arcing fault

effects to the place

of origin.

Level 2

Personal safety

with limitation of the

arcing fault effects to

one cubicle or

double-front unit.

SIVACON S8 Planning Principles – Conforming to standards and design-verified

Acceleration values

There is a simple interrelation between storey acceleration

af and local ground acceleration ag:

af = K x ag

with amplification factor K according to Tab. 9/5. Ground

acceleration depends on the local seismic conditions.

If the switchboard is installed at ground level and directly

on the ground-level foundation, this acceleration factor –

provided that there are no further specifications – can be

regarded as the acceleration which acts on the mounting

plane of the switchboard (K = 1, af = ag).

Depending on how the switchboard is fastened, an amplifi-

cation of the ground acceleration becomes effective. This

dependency is taken into account with the amplification

factor K (Tab. 9/5).

If there is no information about the storey acceleration or

the installation of the switchboard, K = 2 is applied, mean-

ing double the value of the specified ground acceleration is

regarded as the stress the switchboard will be exposed to.

If there are no specifications regarding the directional

assignment of the acceleration parameters, the values are

referred to the horizontal directions (x, y). Conforming to

international standards, the vertical accelerations are lower

and are usually factored in with 0.5 to 0.6 times the hori-

zontal acceleration.

9.3 Seismic safety and seismic

requirements

The SIVACON S8 switchboard is available in earth-

quake-proof design for seismic requirements. The tests

examine its operability and stability during and after an

earthquake. As illustrated in Tab. 9/4, the results of the

earthquake tests are specified for three categories.

Test specifications

• IEC 60068-3-3, German version from 1993:

Environmental testing; Seismic test methods for

equipments – Guidance

• IEC 60068-2-6, German version from 2008:

Environmental testing; Tests – Test Fc: Vibrations,

sinusoidal

• IEC 60068-2-57, German version from 2000:

Environmental testing; Tests – Test Ff: Vibrations – Time-

history and sine-beat method

• KTA 2201.4, 2000: Design of Nuclear Power Plants

against Seismic Events

• IEC 60980, 1989: Recommended practices for seismic

qualification of electrical equipment of the safety system

for nuclear generating stations

• UBC, Uniform Building Code, 1997: Chapter 16,

Division IV

Testing is performed in three axes with independently

generated time histories in three axes in accordance with

IEC 60068-2-57.

Tab. 9/4: SIVACON S8 system characteristics under earthquake

conditions

Category 1: Operability during the earthquake af = 0.6 g (ZPA)

Category 2: Operability after the earthquake af = 0.75 g (ZPA)

Category 3: Stability af = 1.06 g (ZPA)

af = ﬂoor acceleration (acceleration in the mounting plane of the switchboard)

ZPA = zero period acceleration

g = ground acceleration = 9.81 m/s2

Tab. 9/5: Acceleration factor K for SIVACON S8

K factor Fastening of the switchboard

1.0 On rigid foundations or supporting structure of

high stiffness

1.5 Rigidly connected with the building

2.0 On stiff supporting structure which is rigidly

connected with the building

3.0 On supporting structure of low stiffness,

connected to the building

84 SIVACON S8 Planning Principles – Conforming to standards and design-verified

Comparison of seismic requirements

There are numerous international and national standards

referring to the classification of seismic requirements.

Classification varies greatly in these documents. For this

reason, the specification of an earthquake zone always

requires reference to the relevant standard or classification.

With regard to the requirements placed on SIVACON S8

switchboards, it is therefore advantageous to specify the

floor acceleration. Or, if this information is not available,

the ground acceleration in the vicinity of the building

accommodating the installation should be given. Fig. 9/3

shows the relation of the seismic categories 1, 2 and 3 from

Tab. 9/4 to the known earthquake classifications and seis-

mic scale divisions

Fig. 9/3: Comparison of seismic scales for the classiﬁcation of seismic response categories of SIVACON S8

IEC 60721-2-6

IEC 60068-3-3 UBC JMA SIA V 160 Richter Mod. Mercalli MSK

Kat 3 / K = 1Kat 2 / K = 1Kat 1 / K = 1Kat 3 / K = 2Kat 2 / K = 2Kat 1 / K = 2

AG1

AG5

AG4

AG3

AG2

I,II

III

VIII

VII

I...V

1...3

4VI

VIII

VII

...

Z3a

Z3b

Legend:

IEC 60721-2-6 Zone classification acc. to the "Map of natural hazards by Munich Reinsurance"

IEC 60068-3-3 Class of ground acceleration "AG" in g acc. to Table 3 of this standard

UBC Zone classification acc. to the Uniform Building Code (International Conference of Building Officials

JMA Japan Meterological Agency; 1951

SIA Swiss association of engineers and architects

Richter Richter scale

Mod. Mercalli Modified Mercalli scale; 1956

MSK Medvedev-Sponheur-Karnik scale; 1964

Ground acceleration ag in m/s2

SIVACON S8 Planning Principles – Conforming to standards and design-verified

9.4 Declarations of conformity and

certiﬁcates

With a Declaration of Conformity, the manufacturer of the

low-voltage switchboard confirms that the requirements of

the directive or standard referred to in this declaration have

been fulfilled.

Further information about such declarations of conformity

and certificates (Fig. 9/4, and Fig. 9/5 to Fig. 9/7 are exam-

ples of such documents) can be obtained from your Sie-

mens contact.

CE marking / EC declaration of conformity

The CE marking is a label affixed under the sole responsibil-

ity of the manufacturer. The Declaration of Conformity

confirms compliance of products with the relevant basic

requirements of all EU Directives of the European Union

(European Community, EC) applicable to this product.

Low-voltage switchboards – named power switchgear and

controlgear assemblies in the product standard

IEC 61439-2 – must comply with the requirements of the

Low Voltage Directive 2006/95/EC and the

EMC Directive 2004/108/EC. The CE marking is a mandatory

condition for placing products on the markets of the entire

European Union.

The new Low Voltage Directive 2014/35/EU and EMC

Directive 2014/30/EU must be transferred in national law by

the EU member states up to the 20th of April, 2016. At that

time a new declaration of conformity is provided.

86 SIVACON S8 Planning Principles – Conforming to standards and design-verified

Fig. 9/4: EC-Declaration of Conformity for SIVACON S8 in respect of the Low Voltage and EMC Directives

SIVACON S8 Planning Principles – Conforming to standards and design-verified

Fig. 9/5: Declaration of Conformity for SIVACON S8 regarding design veriﬁcation

88 SIVACON S8 Planning Principles – Conforming to standards and design-verified

Fig. 9/6: Declaration of Conformity for SIVACON S8 regarding design veriﬁcation - Annex Page 1/2

SIVACON S8 Planning Principles – Conforming to standards and design-verified

Fig. 9/7: Declaration of Conformity for SIVACON S8 regarding design veriﬁcation - Annex Page 2/2

90 SIVACON S8 Planning Principles – Conforming to standards and design-verified

Chapter 10

Technical annex

10.1 Power supply systems according

to their type of connection to earth 92

10.2 Loads and dimensioning 95

10.3

Degrees of protection according to

IEC 60529

10.4

Forms of internal separation based on

IEC 61439-2

10.5

Operating currents of three-phase

asynchronous motors

10.6

Three-phase distribution transformers

100

92 SIVACON S8 Planning Principles – Technical annex

(EMC). From experience the TN-S system has the best

cost-benefit ratio of electric networks at the low-voltage

level. To determine the type of connection to earth, the

entire installation from the power source (transformer) to

the electrical consumer must be considered. The low-volt-

age switchboard is merely one part of this installation.

10.1 Power supply systems according

to their type of connection to earth

The power supply systems according the type of connec-

tion to earth considered for power distribution are de-

scribed in IEC 60364-1. The type of connection to earth

must be selected carefully for the low-voltage network, as

it has a major impact on the expense required for protective

measures (Fig. 10/1). On the low-voltage side, it also

influences the system's electromagnetic compatibility

10 Technical annex

Fig. 10/1: Systems according to the type of connection to earth in accordance with IEC 60364-1

TN system: In the TN system, one operating line is directly earthed; the exposed conductive parts in the electrical installation are connected

to this

earthed point via protective conductors. Dependent on the arrangement of the protective (PE) and neutral (N) conductors,

three types are distinguished:

TT system: In the TT system, one operating line is directly

earthed; the exposed conductive parts in the

electrical installation are connected to earthing

electrodes which are electrically independent of the

earthing electrode of the system.

IT system: In the IT system, all active operating lines are

separated from earth or one point is connected

to earth via an impedance.

First letter = earthing condition of the supplying

power source

T = direct earthing of one point (live conductor)

I = no point (live conductor) or one point of the power

source is connected to earth via an impedance

Second letter = earthing condition of the exposed

conductive parts in the electrical installation

T = exposed conductive parts are connected to earth

separately, in groups or jointly

N = exposed conductive parts are directly connected to the

earthed point of the electrical installation (usually

N conductor close to the power source) via protective

conductors

Further letters = arrangement of the neutral conductor and

protective conductor

S = neutral conductor function and protective conductor function

are laid in separate conductors.

C = neutral conductor function and protective conductor function

are laid in one conductor (PEN).

Power

source Electrical installation

a) TN-S system:

In the entire system, neutral (N)

and protective (PE) conductors

are laid separately.

b) TN-C system:

In the entire system, the functions

of the neutral and protective conductor

are combined in one conductor (PEN).

c) TN-C-S system:

In a part of the system, the functions

of the neutral and protective conductor

are combined in one conductor (PEN).

Power

source Electrical installation

Power

source Electrical installation Power

source Electrical installation

Power

source Electrical installation

Exposed conductive part

High-resistance impedance

Operational or system earthing R

Earthing of exposed conductive parts R

(separately, in groups or jointly)

1 1

PEN

PEN PE

3 4 1

SIVACON S8 Planning Principles – Technical annex

In the event of a short-circuit to an exposed conductive part

in a TN system, a considerable proportion of the single-pole

short-circuit current is not fed back to the power source

through a connection to earth but through the protective

conductor. The comparatively high single-pole short-circuit

current allows for the use of simple protective devices such

as fuses or miniature circuit-breakers, which clear the fault

within the permissible fault disconnect time.

In building installations, networks with TN-S systems are

preferably used today. When a TN-S system is used in the

entire building, residual currents in the building, and thus

an electromagnetic interference by galvanic coupling, can

be prevented during normal operation because the operat-

ing currents flow back exclusively through the separately

laid insulated N conductor. In case of a central arrangement

of the power sources, the TN-S system can always be

recommended. In that, the system earthing is implemented

at one central earthing point (CEP) for all sources, for

example in the main low-voltage distribution system.

Please note that neither the PEN nor the PE must be

switched. If a PEN conductor is used, it is to be insulated

over its entire course – this includes the distribution system

(please refer to the example in Fig. 10/2). The magnitude of

the single-pole short-circuit current directly depends on the

position of the CEP.

Caution: In extensive supply networks with more than one

splitter bridge, stray short-circuit currents may occur.

4-pole switches must be used if two TN-S subsystems are

connected to each other. In TN-S systems, only one earth-

ing bridge may be active at a time. Therefore, it is not

permitted that two earthing bridges be interconnected via

two conductors.

Today, networks with TT systems are still used in rural

supply areas only and in few countries. In this context, the

stipulated independence of the earthing systems must be

Fig. 10/2: Line diagram for an earthing concept based on a central earthing point (CEP)

PEN

Low-voltage main distribution board Power sourceSubdistribution board

Central

Earthing

Point

Main

Equipotential

Bonding conductor

Neutral choke

(no longer required

for modern systems)

94 SIVACON S8 Planning Principles – Technical annex

observed. In accordance with IEC 60364-5-54, a minimum

clearance ≥ 15 m is required.

Networks with an IT system are preferably used for rooms

with medical applications in accordance with IEC 60364-7-

710 in hospitals and in production, where no supply inter-

ruption is to take place upon the first fault, for example in

the cable and optical waveguide production. The TT system

as well as the IT system require the use of residual current

devices (RCDs) – previously named FI (fault interrupters)

– for almost every circuit.

Fault in the IT network

In the IT network, it is the phase-earth-phase fault – or

double fault – which has to be managed by the cir-

cuit-breaker as the worst case fault at the load and supply

side (Fig. 10/3). During such a fault, the full phase-to-phase

voltage of 690 V, for example, is applied to the main con-

tact, and simultaneously the high short-circuit current.

The product standard IEC 60947-2 for circuit-breakers calls

for additional tests in accordance with Annex H of this

standard to qualify them for use in non-earthed or imped-

ance-earthed networks (IT systems). Accordingly, cir-

cuit-breaker specifications relating to the IT system must be

observed.

Fig. 10/3: Double fault in the IT system

690 V

3-phase 690 V AC

SIVACON S8 Planning Principles – Technical annex

Short-circuit current carrying capacity of distribution

busbars and functional units

IEC 61439-1, section 8.6.1 permits a reduction of the

short-circuit strength of the vertical distribution busbar and

its outgoing feeders in relation to the the main busbars "if

these connections are arranged in such a way that a short

circuit between phase and earthed parts needn't be ex-

pected under proper service conditions." The background

for this simplification is the usually higher rated current of

the main busbar compared to the currents of the distribu-

tion busbars, for the contact systems of the withdrawable

units and in the feeder lines to the functional units. Lower

temperature rises can be expected for these lower branch-

ing currents, so that it hardly makes sense to aim at the

same dynamic and thermal short-circuit strength as for the

main busbar.

Example:

To attain a required rated short-circuit strength of 100 kA, a

3VL5 MCCB with a switching capacity of 100 A is used as a

short-circuit protective device:

In case of a disconnection on short circuit, merely a peak

current of approximately 50 kA will flow as a let-through

current for a short time, so that a root mean square value

(RMS) of 35 kA can be assumed as maximum. It is only this

reduced current which stresses the conductors in this

circuit for the very short disconnect time of the breaker.

Test of dielectric properties

According to IEC 61439-1, section 10.9 the dielectric

properties of the switchboard must be tested in considera-

tion of devices having reduced dielectric properties. This

means: "For this test, all the electrical equipment of the

assembly shall be connected, except those items of appara-

tus which, according to the relevant specifications, are

designed for a lower test voltage; current-consuming

apparatus (e.g. windings, measuring instruments, voltage

surge suppression devices) in which the application of the

test voltage would cause the flow of a current, shall be

disconnected. ... Such apparatus shall be disconnected at

one of their terminals unless they are not designed to

withstand the full test voltage, in which case all terminals

may be disconnected."

10.2 Loads and dimensioning

Current carrying capacity considering the ambient

temperature

The current carrying capacity can be calculated from the

following relation taking the ambient temperature into

account.

I12 / I22 = DT1 / DT2

Where the power ratio (of the currents squared) equals the

ratio of temperature differences DT between object and

ambience.

Example of a main busbar:

With a

rated current I1 = 4,000 A and a

permissible busbar temperature TSS = 130 °C,

there is a rated current I2 for an ambient temperature

Tenv = 40 °C

I2 = I1 x ∆T1

∆T2

= I1 x (TSS - Tenv)

(TSS - 35 °C)

90 °C

95 °C

I2 = 4,000 A x = 3,893 A

Rated frequency 60 Hz

According to IEC 61439-1, section 10.10.2.3.1, the rated

current at 60 Hz must be reduced to 95 % of its value at

50 Hz in case of currents greater than 800 A.

96 SIVACON S8 Planning Principles – Technical annex

• According to subsection 8.4.3.2.3:

"A protective conductor within the assembly shall be so

designed that it is capable of withstanding the highest

thermal and dynamic stresses arising from faults in

external circuits at the place of installation that are

supplied through the assembly. Conductive structural

parts may be used as a protective conductor or a part of

it." The following is required for PEN conductors in

addition:

- Minimum cross section ≥ 10 mm2 (Cu) or 16 mm2 (Al)

- PEN cross section > N cross section

- "Structural parts shall not be used as PEN conductors.

However, mounting rails made of copper or aluminium

may be used as PEN conductors."

- If the PEN current can reach high values (e.g. in elec-

trical installations with many fluorescent lamps), it may

be required that the PEN conductor has the same or a

higher current carrying capacity as / than the phase

conductor. This capacity value must be agreed separately

between the assembly manufacturer and the user.

• According to section 8.8 (for terminals of protective

conductors led into the assembly from the outside):

In the absence of a special agreement between the

assembly manufacturer and the user, terminals for pro-

tective conductors shall be rated to accommodate copper

conductors of a cross-sectional area based on the cross

section of the corresponding phase conductor

(see Tab. 10/2).

Dimensioning of protective conductors

According to IEC 61439-1, section 8.4 and 8.8, an earth

continuity connection (PE, PEN) must be ensured, which

must meet the following requirements in accordance with

IEC 61439-1.

• According to subsection 8.4.3.2.2:

"All exposed conductive parts of the assembly shall be

interconnected together and to the protective conductor

of the supply or via an earthing conductor to the earthing

arrangement. These interconnections may be achieved

either by metal screwed connections, welding or other

conductive connections or by a separate protective

conductor." Tab. 10/1 must be used for a separate pro-

tective conductor.

Furthermore, certain exposed conductive parts of the

assembly which do not constitute a danger need not be

connected to the protective conductor.

This applies

– "either because they cannot be touched on large

surfaces or grasped with the hand

– or because they are of small size (approximately 50 mm

by 50 mm) or so located as to exclude any contact with

live parts."

"This applies to screws, rivets and nameplates. It also

applies to electromagnets of contactors or relays,

magnetic cores of transformers, certain parts of releases,

or similar, irrespective of their size. When removable parts

are equipped with a metal supporting surface, these

surfaces shall be considered sufficient for ensuring earth

continuity of protective circuits provided that the pressure

exerted on them is sufficiently high."

Tab. 10/1: Cross-sectional areas of protective conductors made of

copper according to subsection 8.4.3.2.2 of IEC 61439-1

Rated operating current Ie

Minimum cross section of

protective conductor

Ie ≤ 20 S1)

20 < Ie ≤ 25 2.5 mm2

25 < Ie ≤ 32 4 mm2

32 < Ie ≤ 63 6 mm2

63 < Ie 10 mm2

1) S = cross section of phase conductor in mm2

Tab. 10/2: Minimum requirements for connecting protective

copper conductors (PE and PEN) according to section 8.8 (from the

outside) of IEC 61439-1

Permissible cross-sectional

range of phase conductors S

Minimum cross section of

corresponding protective

conductor (PE, PEN) SP 1)

S ≤ 16 mm2S

16 mm2 < S ≤ 35 mm216 mm2

35 mm2 < S ≤ 400 mm2½ x S

400 mm2 < S ≤ 800 mm2200 mm2

800 mm2 < S ¼ x S

1) The neutral current can be inﬂuenced by load harmonics to a signiﬁcant

extent.

SIVACON S8 Planning Principles – Technical annex

10.3 Degrees of protection according

to IEC 60529

IEC 60529 establishes a classification system for degrees of

protection ensured by an enclosure which relates to electri-

cal equipment of a voltage rating up to 72.5 kV. The IP code

(IP = international protection) described in this standard

characterises the degrees of protection against access to

hazardous parts, ingress of solid foreign bodies and the

ingress of water which are ensured by an enclosure. It is

briefly summarized in Tab. 10/3.

Tab. 10/3: Structure of the IP code and the meaning of code numerals and code letters

Code constituent Code letter or code number Meaning for the protection of

equipment

Meaning for the safety of

persons

International protection IP - -

1st code number: Against the ingress of solid bodies Against access to dangerous parts

(not protected)

1≥ 50.0 mm in diameter back of the hand

2≥ 12.5 mm in diameter ﬁnger

3≥ 2.5 mm in diameter tool

4≥ 1.0 mm in diameter wire

5dust-protected wire

6dust-proof wire

2nd code number: Against the ingress of water with a

damaging effect -

(not protected)

1vertical drops

2drops to an angle of 15°

(enclosure tilt 15°)

3spray water

4splash water

5jet water

6powerful jet water

7temporary immersion

8continuous immersion

Additional letter (optional) - Against access to dangerous parts

with a

Aback of the hand

Bﬁnger

Ctool

Dwire

Additional letter (optional) Supplementary information

especially for -

Hhigh-voltage devices

Mmovement during water test

Sstandstill during water test

Wweather conditions

98 SIVACON S8 Planning Principles – Technical annex

Note: IP2X also covers IPXXB.

Internal separation can be ensured by partitions, or protec-

tive covers (barriers, made of metal or non-metal materi-

als), insulation of exposed conductive parts or the inte-

grated enclosure of devices, as implemented in the mould-

ed-plastic circuit-breaker, for example. The forms of internal

separation mentioned in IEC 61439-2 – form 1, 2a, 2b, 3a,

3b, 4a and 4b – are listed in Tab. 10/4.

10.4 Forms of internal separation

based on IEC 61439-2

IEC 61439-2 describes possibilities how to subdivide power

switchgear and controlgear assemblies. The following shall

be attained by a subdivision into separate functional units,

separate compartments or by enclosing conductive parts:

• Protection against contact with hazardous parts

(minimum IPXXB, where XX represents any code numbers

1 and 2 of the IP code)

• Protection against ingress of solid foreign bodies

(minimum IP2X, where X represents any 2nd code

number)

Tab. 10/4: Internal separation of switchgear and controlgear assemblies in accordance with IEC 61439-2

Form Explanations Form Explanations Block diagram

1 No internal separation 1No internal separation

2Separation between busbars and functional units

2a No separation between terminals

and busbars

2b Separation between terminals and

busbars

Separation between busbars and all functional units

Mutual separation of all functional units

Separation between the terminals of conductors led to

the units from the outside and these functional units,

not however between the terminals of these functional

units

3a No separation between terminals

and busbars

3b Separation between terminals and

busbars

Separation between busbars and all functional units

Mutual separation of all functional units

Separation between the terminals of conductors led to

the units from the outside which are assigned to a

functional unit and those terminals of all the other

functional units and busbars

Terminals in the same separation

that is used for the connected

functional unit

Terminals not in the same

separation that is used for the

connected functional unit

Legend:

Enclosure

Internal

separation

Busbar

Functional unit

Terminal for conductors

led to the unit

from outside

SIVACON S8 Planning Principles – Technical annex

Standard power P

Motor current I (guide value)

at 400 V at 500 V at 690 V

0.06 kW 0.20 A 0.16 A 0.12 A

0.09 kW 0.30 A 0.24 A 0.17 A

0.12 kW 0.44 A 0.32 A 0.23 A

0.18 kW 0.60 A 0.48 A 0.35 A

0.25 kW 0.85 A 0.68 A 0.49 A

0.37 kW 1.1 A 0.88 A 0.64 A

0.55 kW 1.5 A 1.2 A 0.87 A

0.75 kW 1.9 A 1.5 A 1.1 A

1.1 kW 2.7 A 2.2 A 1.6 A

1.5 kW 3.6 A 2.9 A 2.1 A

2.2 kW 4.9 A 3.9 A 2.8 A

3 kW 6.5 A 5.2 A 3.8 A

4 kW 8.5 A 6.8 A 4.9 A

5.5 kW 11.5 A 9.2 A 6.7 A

7.5 kW 15.5 A 12.4 A 8.9 A

11 kW 22 A 17.6 A 12.8 A

15 kW 29 A 23 A 17 A

18.5 kW 35 A 28 A 21 A

22 kW 41 A 33 A 24 A

30 kW 55 A 44 A 32 A

37 kW 66 A 53 A 39 A

45 kW 80 A 64 A 47 A

55 kW 97 A 78 A 57 A

75 kW 132 A 106 A 77 A

90 kW 160 A 128 A 93 A

110 kW 195 A 156 A 113 A

132 kW 230 A 184 A 134 A

160 kW 280 A 224 A 162 A

200 kW 350 A 280 A 203 A

250 kW 430 A 344 A 250 A

Tab. 10/5: Guide values for the operating currents of three-phase

asynchronous motors (AC-2/AC-3) in accordance with IEC 60947-4-1

10.5 Operating currents of three-

phase asynchronous motors

To enable the conversion of motor power values, Tab. 10/5

specifies guide values for the motor current present with

different voltages.

100 SIVACON S8 Planning Principles – Technical annex

Rated power

SrT

Rated voltage

400 V AC / 50 Hz 525 V AC / 50 Hz 690 V AC / 50 Hz

Rated value of the short-

circuit voltage ukr

Rated value of the short-

circuit voltage ukr

Rated value of the short-

circuit voltage ukr

4 % 6 % 4 % 6 % 4 % 6 %

Rated

current Ir

Initial short-circuit

alternating current Ik“ 1)

Rated

current Ir

Initial short-circuit

alternating current Ik“ 1)

Rated

current Ir

Initial short-circuit

alternating current Ik“ 1)

50 kVA 72 A 1,933 A 1,306 A 55 A 1,473 A 995 A 42 A 1,116 A 754 A

100 kVA 144 A 3,871 A 2,612 A 110 A 2,950 A 1,990 A 84 A 2,235 A 1,508 A

160 kVA 230 A 6,209 A 4,192 A 176 A 4,731 A 3,194 A 133 A 3,585 A 2,420 A

200 kVA 288 A 7,749 A 5,239 A 220 A 5,904 A 3,992 A 167 A 4,474 A 3,025 A

250 kVA 360 A 9,716 A 6,552 A 275 A 7,402 A 4,992 A 209 A 5,609 A 3,783 A

315 kVA 455 A 12,247 A 8,259 A 346 A 9,331 A 6,292 A 262 A 7,071 A 4,768 A

400 kVA 578 A 15,506 A 10,492 A 440 A 11,814 A 7,994 A 335 A 8,953 A 6,058 A

500 kVA 722 A 19,438 A 13,078 A 550 A 14,810 A 9,964 A 418 A 11,223 A 7,581 A

630 kVA 910 A 24,503 A 16,193 A 693 A 18,669 A 12,338 A 525 A 14,147 A 9,349 A

800 kVA 1,154 A - 20,992 A 880 A - 15,994 A 670 A - 12,120 A

1,000 kVA 1,444 A - 26,224 A 1,100 A - 19,980 A 836 A - 15,140 A

1,250 kVA 1,805 A - 32,791 A 1,375 A - 24,984 A 1,046 A - 18,932 A

1,600 kVA 2,310 A - 41,857 A 1,760 A - 31,891 A 1,330 A - 24,265 A

2,000 kVA 2,887 A - 52,511 A 2,200 A - 40,008 A 1,674 A - 30,317 A

2,500 kVA 3,608 A - 65,547 A 2,749 A - 49,941 A 2,090 A - 37,844 A

3,150 kVA 4,550 A - 82,656 A 3,470 A - 62,976 A 2,640 A - 47,722 A

1) Ik“ uninﬂuenced initial symmetrical transformer short-circuit current in consideration of the voltage and correction factor of the transformer impedance in

accordance with IEC 60909-0, without considering the system source impedance

Tab. 10/6: Rated currents and initial symmetrical short-circuit currents of three-phase distribution transformers

Exemplified by

• Rated transformer power SrT = 500 kVA

• Voltage factor k

k = 1.45 A/kVA for a rated voltage of 400 V

k = 1.1 A/kVA for a rated voltage of 525 V

k = 0.84 A/kVA for a rated voltage of 690 V

• Rated short-circuit voltage ukr =4 %

there are the following approximations for Ur = 400 V:

Ir = (1.45 x 500) A = 725 A

Ik“ = (725 x 100 / 4) A = 18.125 kA

10.6 Three-phase distribution

transformers

Important parameters for the connection of the SIVACON

S8 low-voltage switchboard to three-phase distribution

transformers are listed in Tab. 10/6.

Approximation formulas for current estimation, if there are

no specified table values:

For the rated transformer current by approximation:

Ir = k x SrT

For the initial symmetrical transformer short-circuit current

by approximation:

Ik“ = Ir / ukr

Chapter 11

Glossary and rated parameters

11.1 Terms and deﬁnitions 102

11.2 Rated parameters 104

11.3 Index of tables 106

11.4 Index of ﬁgures 108

102 SIVACON S8 Planning Principles – Glossary and rated parameters

Routine verification

Verification of each assembly performed during and/or

after manufacture to confirm whether it complies with the

requirements of the relevant assembly standard

Functional unit

Part of an assembly comprising all the electrical and

mechanical elements including switching devices that

contribute to the fulfilment of the same function

Removable part

Part which may be removed in whole from the assembly for

replacement, even if the connected circuit is energised

Withdrawable unit

Removable part, which can be brought from a connected

position to a disconnected position, or, if applicable, to a

test position, while it remains mechanically connected to

the power switchgear and controlgear assembly

Connected position

Position of a removable part (or withdrawable unit) when it

is fully connected for the intended function

Test position

Position of a withdrawable unit in which the relevant main

circuits are open on the incoming side, while the

requirements placed upon an isolating gap need not be

met, and in which the auxiliary circuits are connected in a

manner that assures that the withdrawable unit undergoes

a function test while it remains mechanically connected to

the switchgear and controlgear assembly

(Note: The opening may also be established by operating a

suitable device without the withdrawable unit being

mechanically moved)

Disconnected position

Position of a withdrawable unit in which the isolating gaps

in the main and auxiliary circuits are open while it remains

mechanically connected to the assembly (Note: The

isolating gap may also be established by operating a

suitable device without the withdrawable unit being

mechanically moved)

Isolating gap

Clearance in air between open contacts which meets the

safety requirements defined for the disconnector

11.1 Terms and deﬁnitions

The information provided in the two standards IEC 61439-1

and -2 is used to explain the relevant terms referred to in

this planning manual:

Low-voltage switchgear and controlgear assembly

(assembly)

Combination of one or more low-voltage switching devices

together with associated control, measuring, signalling,

protective, regulating equipment, with all the internal

electrical and mechanical interconnections and structural

parts

Assembly system

Full range of mechanical and electrical components

(enclosures, busbars, functional units, etc.), as defined by

the original manufacturer, which can be assembled in

accordance with the original manufacturer’s instructions in

order to produce various assemblies

Power switchgear and controlgear assembly

(PSC assembly)

Low-voltage switchgear and controlgear assembly which is

used to distribute and control electric energy for all types of

loads, in industrial commercial and similar applications not

intended to be operated by ordinary persons

Design verification

Verification performed on a sample of an assembly or parts

of assemblies to show that the type meets the

requirements of the relevant assembly standard

(Note: The design verification may comprise one or more

equivalent and alternative methods such as tests, calcu-

lations, physical measurements or the application of con-

struction rules)

Verification test

Test performed on a sample of an assembly or parts of

assemblies to verify that the type meets the requirements

of the relevant assembly standard (Note: "Verification tests"

correspond to "type tests" as described in the no longer

valid IEC 60439-1 standard)

Verification assessment

Design verification of strict construction rules or calcu-

lations applied to a sample of an assembly or parts of

assemblies to show that the type meets the requirements

of the relevant assembly standard

Construction rule

Defined rules for the construction of an assembly which

may be applied as an alternative to a verification test

11 Glossary and rated parameters

103

SIVACON S8 Planning Principles – Glossary and rated parameters

Removed position

Position of a removable part or withdrawable unit which

has been removed from the switchgear and controlgear

assembly and is mechanically and electrically disconnected

from the assembly

Supporting structure (frame)

Part which is an integral part of a switchgear and con-

trolgear assembly and which is intended to hold various

components of such an assembly and an enclosure

Enclosure

Housing providing the type and degree of protection

suitable for the intended application

Cubicle

Constructional unit of an assembly between two successive

vertical delineations

Sub-section

Constructional unit of an assembly between two successive

horizontal or vertical delineations within a section

Compartment

Cubicle or sub-section enclosed except for openings

necessary for interconnection, control or ventilation

Coding device

Device which prevents a removable part to be placed in a

position not intended for this removable part

Transport unit

Part of an assembly or a complete assembly suitable for

transportation without being dismantled

Operating gangway within a PSC assembly

Space the operator must enter to be able to operate and

monitor the power switchgear and controlgear assembly

properly

Maintenance gangway within a PSC assembly

Space which is only accessible for authorized persons and

which is mainly intended for the maintenance of built-in

equipment

104 SIVACON S8 Planning Principles – Glossary and rated parameters

Time values > 1 s can be converted with

I² x t = constant.

For example, from Icw = 50 kA, 1 s,

Icw = 28.9 kA can be calculated for 3 s:

Icw(t2) = t1

Icw(t1) x

Icw(3 s) = 1 s

3 s

50 kA x = 28.9 kA

11.2 Rated parameters

The manufacturers of low-voltage switchgear and control-

gear assemblies specify rated values in accordance with

IEC 61439-1 and -2. For the low-voltage switching devices

applied, rated values must be stated which are in accord-

ance with the relevant product-specific standards from the

IEC 60947 series. These rated values apply to defined

operating conditions and characterise the usability of a

switchgear and controlgear assembly.

The following ratings in accordance with IEC 61439-1 and

-2 shall be the basis for assembly configurations:

Rated voltage Un

The highest nominal value of alternating (root mean square

value) or direct voltage specified by the assembly manu-

facturer for which the main circuits of the switchgear and

controlgear assembly are designed.

Rated operational voltage Ue

(of a circuit in an assembly)

Value of voltage, declared by the assembly manufacturer,

which combined with the rated current determines its

application.

Rated insulation voltage Ui

Root mean square withstand voltage value, assigned by the

assembly manufacturer to the equipment or to a part of it,

characterising the specified (long-term) withstand capa-

bility of its insulation.

Rated impulse withstand voltage Uimp

Impulse withstand voltage value, declared by the assembly

manufacturer, characterising the specified withstand

capability of the insulation against transient overvoltages.

Rated current In

Value of current declared by the assembly manufacturer

which considers the equipment ratings and their

arrangement and use. It can be carried without the tem-

perature rise of various parts of the assembly exceeding

specified limits under specified conditions.

Rated peak withstand current Ipk

Value of peak short-circuit current, declared by the

assembly manufacturer, that can be withstood under

specified conditions.

Rated short-time withstand current Icw

The root mean square value of short-time current, declared

by the assembly manufacturer, that can be withstood under

specified conditions, defined in terms of a current and

time.

Tab. 11/1: Factor n as a function of cos j and Icw

n cos jRated short-time withstand current Icw

1.5 0.7

Icw ≤ 5 kA

1.7 0.7 5 kA < Icw ≤ 10 kA

20.3 10 kA < Icw ≤ 20 kA

2.1 0.25 20 kA < Icw ≤ 50 kA

2.2 0.2 5 kA < Icw

Rated conditional short-circuit current Icc

Value of prospective short-circuit current, declared by the

assembly manufacturer, that can be withstood for the total

operating time (clearing time, duration of current flow) of

the short-circuit protective device (SCPD) under specified

conditions.

Rated current of the assembly InA

The rated current of the assembly is the smaller of:

• the sum of the rated currents of the incoming circuits

within the assembly operated in parallel;

• the total current which the main busbar is capable of

distributing in the particular assembly configuration.

Rated current of a circuit Inc

The rated current of a circuit which is specified by the

assembly manufacturer depends on the rated values of the

individual items of electrical equipment in the circuit within

the assembly, their arrangement and their type of appli-

cation. The circuit must be capable of carrying this current

when operated alone without that overtemperatures in

individual components will exceed the limit values

specified.

Factor n = Ipk / Icw

To determine the surge current, the root mean square.

value of the short-circuit current must be multiplied with

factor n. Tab. 11/1 lists values for n from IEC 61439-1.

105

SIVACON S8 Planning Principles – Glossary and rated parameters

Rated diversity factor (RDF)

The rated diversity factor is the rated current value given as

a percentage by the assembly manufacturer, the outgoing

feeders of an assembly can continuously and simulta-

neously be loaded with taking the mutual thermal

influences into account.

The rated diversity factor may be specified

• for groups of circuits

• for the entire switchgear and controlgear assembly

The rated current of the circuits Inc multiplied by the rated

diversity factor must be greater than or equal to the as-

sumed outgoing feeder load.

The rated diversity factor recognizes that several outgoing

feeders in a cubicle are in practice loaded intermittently, or

not fully loaded simultaneously. However, if there is no

agreement between manufacturer and user as to the real

loading of the outgoing feeder circuits, the values given in

Tab. 11/2 shall be applied.

Tab. 11/2: Rated diversity factors RDF for various load types

Type of loading Assumed diversity

factor

Power distribution: 2 - 3 circuits 0.9

Power distribution: 4 - 5 circuits 0.8

Power distribution: 6 - 9 circuits 0.7

Power distribution: 10 circuits and more 0.6

Electric actuators 0.2

Motors ≤ 100 kW 0.8

Motors > 100 kW 1

If equipment is to be coordinated which is used in a switch-

board, the rated values given in the IEC 60947 product

standards shall be the basis:

Trip class – CLASS

Trip classes define time intervals within which the pro-

tective devices (overload trip units of circuit breakers or

overload relays) must trip in cold state when assuming a

symmetrical 3-phase load of 7.2 times the setting current:

• CLASS 5, CLASS 10:

for standard applications (normal starting)

• CLASS 20, CLASS 30, CLASS 40:

for applications with a high starting current over a longer

period of time

In addition to the overload protective devices, the con-

tactors and the short-circuit fuses must also be dimen-

sioned for longer starting times.

Short-circuit breaking capacity

The short-circuit breaking capacity is the short-circuit

current declared by the manufacturer which is capable of

switching off the device / motor starter under specified

conditions.

Type of co-ordination

The type of co-ordination describes the permissible degree

of damage after a short circuit. Under no circumstances

must persons or the installation be endangered in the

event of a short circuit.

Specifically: Type of co-ordination 2 or “Type 2”

The starter remains operable. No damage must be

present on devices with the exception of slight

contactor contact welding, if these contacts can be

easily separated without any substantial deformation.

Pollution degree

The pollution degree refers to the environmental conditions

for which the assembly is intended. For switching devices

and components inside an enclosure, the pollution degree

of the environmental conditions in the enclosure is

applicable.

For the purpose of evaluating clearances and creepage

distances four degrees of pollution in the micro-

environment are established.

Specifically: Pollution degree 3

Conductive pollution occurs or dry, non-conductive

pollution occurs which is expected to become con-

ductive due to condensation.

106 SIVACON S8 Planning Principles – Glossary and rated parameters

11.3 Index of tables

Tab. Title Page

Chapter 2

2/1 Technical data, standards and approvals for the

SIVACON S8 switchboard 8

2/2 Schematic overview of switchboard

conﬁgurations for SIVACON S8 10

2/3 Cubicle types and busbar arrangement 12

2/4 Cubicle dimensions 14

2/5 Surface treatment 14

2/6 Dimensions of the corner cubicles 15

2/7 Rating of the main busbar 16

2/8 Cubicle widths for earthing short-circuit points 17

2/9 Cable terminal for the main earthing busbar 17

2/10 Basic data of the different mounting designs 18

Chapter 3

3/1 General cubicle characteristics in circuit-breaker

design 23

3/2 Cubicle dimensions for top busbar position 24

3/3 Cubicle dimensions for rear busbar position 25

3/4 Cubicle dimensions for rear busbar position with

two busbar systems in the cubicle 26

3/5 Cable connection for cubicles with 3WL 27

3/6 Rated currents for cubicles with one 3WL 28

3/7 Dimensions for cubicles with three ACB of type

3WL 29

3/8 Cable connection in cubicles with up to three ACB 29

3/9

Rated currents for special load cases of a circuit-

breaker cubicle with three 3WL11 circuit-breakers

in the cubicle

3/10 Widths for incoming/outgoing feeder cubicles

with MCCB 30

3/11 Cable connection for cubicles with MCCB of type

3VL 30

3/12 Rated currents for cubicles with 3VL 30

3/13 Cubicle width for direct supply and direct feeder 31

3/14 Cable connection for direct supply and direct

feeder 31

3/15 Rated currents for direct supply and direct feeder 31

Tab. Title Page

Chapter 4

4/1 General cubicle characteristics for the universal

mounting design 34

4/2 Ratings of the vertical distribution busbar 36

4/3 Cubicle characteristics for the ﬁxed-mounted

design 37

4/4 Connection cross sections in ﬁxed-mounted

cubicles with a front door 37

4/5 Ratings for cable feeders 37

4/6 Cubicle characteristics for in-line switch-

disconnectors 38

4/7 General cubicle characteristics for the

withdrawable design 38

4/8 Characteristics of withdrawable units in SFD 39

4/9 Connection data for the main circuit 40

4/10 Connection data for the auxiliary circuit 40

4/11 Number of available auxiliary contacts for

withdrawable units in SFD 40

4/12 Withdrawable units in HFD 41

4/13 Characteristics of the withdrawable units in HFD 42

4/14 Connection data for the main circuit 44

4/15 Connection data for the auxiliary circuit 44

4/16 Number of available auxiliary contacts for

withdrawable units in HFD 44

4/17 Rated currents and minimum withdrawable unit

heights for cable feeders in SFD / HFD 45

4/18

Minimum withdrawable unit sizes for:

fused motor feeders, 400 V, CLASS 10,

with overload relay, type 2 at 50 kA

4/19

Minimum withdrawable unit sizes for:

fused motor feeders, 400 V, CLASS 10,

with SIMOCODE, type 2 at 50 kA

4/20

Minimum withdrawable unit sizes for:

fuseless motor feeders, 400 V, CLASS 10,

overload protection with circuit-breaker, type 2

at 50 kA

4/21

Minimum withdrawable unit sizes for:

fuseless motor feeders, 400 V, CLASS 10,

with overload relay, type 2 at 50 kA

4/22

Minimum withdrawable unit sizes for:

fuseless motor feeders, 400 V, CLASS 10,

with SIMOCODE, type 2 at 50 kA

107

SIVACON S8 Planning Principles – Glossary and rated parameters

Tab. Title Page

Chapter 5

5/1 General cubicle characteristics for in-line design,

plug-in 50

5/2 Rating data of the vertical distribution busbar

3NJ62 51

5/3 Additional built-in elements for 3NJ62 51

5/4 Derating factors for 3NJ62 fuse links 51

5/5 Rating data of the 3NJ62 cable feeders 51

5/6 Conversion factors for different ambient

temperatures 52

5/7 Conﬁguration rules for 3NJ62: arrangement of

the in-line units in the cubicle 52

5/8 Rating data of the vertical distribution busbar

SASIL plus 53

5/9 Additional built-in elements for SASIL plus 53

5/10 Derating factors for SASIL plus fuse links 53

5/11 Rating data of the SASIL plus cable feeders 53

5/12 Conversion factors for different ambient

temperatures 54

5/13 Conﬁguration rules for SASIL plus: arrangement

of the in-line units in the cubicle 54

Chapter 6

6/1 General cubicle characteristics for ﬁxed-mounted

in-line design 57

6/2 Rating data of the 3NJ4 cable feeders 57

6/3 Dimensions if additional built-in elements are

used 58

6/4 Mounting location of additional built-in elements 58

6/5 Device compartment for in-line units in the 2nd

row 58

6/6 Rating data of the cable feeders for in-line units

in the 2nd row 58

6/7 General cubicle characteristics for ﬁxed-mounted

cubicles with front cover 59

6/8 Rating data of the vertical distribution busbar 60

6/9 Conductor cross sections in ﬁxed-mounted

cubicles with a front door 60

6/10

Rating data of the cable feeders for fuse-switch-

disconnectors and switch-disconnectors with

fuses

6/11 Rating data of the cable feeders for circuit-

breakers 62

6/12 Conﬁguration data of the mounting kits for

modular installation devices 62

6/13 General characteristics for cubicles for

customized solutions 63

6/14 Conﬁguration data on cubicle design for

customized solutions 64

6/15 Rating data of the vertical distribution busbar 64

6/16 Conﬁguration data on mounting options for

customized solutions 64

Tab. Title Page

Chapter 7

7/1 General characteristics of cubicles for reactive

power compensation 66

7/2 Choked capacitor modules with built-in audio

frequency suppressor 67

7/3 Conﬁguration of capacitor modules 68

7/4 Conversion factors F for phase angle adjustments 69

7/5 Connecting cables and back-up fuses for

separately installed compensation cubicles 70

Chapter 8

8/1 Weights of SIVACON S8 cubicles (orientation

values) 76

8/2 Power losses of SIVACON S8 cubicles (orientation

values) 76

8/3 Normal service conditions for SIVACON S8

switchboards 77

8/4 Special service conditions for SIVACON S8

switchboards 78

Chapter 9

9/1 Test for the design veriﬁcation in accordance with

IEC 61439-2 80

9/2 SIVACON S8 system characteristics under arcing

conditions 82

9/3 SIVACON S8 arc levels (system areas to which the

internal arc is limited are marked in orange) 82

9/4 SIVACON S8 system characteristics under

earthquake conditions 83

9/5 Acceleration factor K for SIVACON S8 83

Chapter 10

10/1

Cross-sectional areas of protective conductors

made of copper according to subsection

8.4.3.2.2 of IEC 61439-1

10/2

Minimum requirements for connecting protective

copper conductors (PE and PEN) according to

section 8.8 (from the outside) of IEC 61439-1

10/3 Structure of the IP code and the meaning of code

numerals and code letters 97

10/4 Internal separation of switchgear and controlgear

assemblies in accordance with IEC 61439-2 98

10/5

Guide values for the operating currents of three-

phase asynchronous motors (AC-2/AC-3) in

accordance with IEC 60947-4-1

10/6

Rated currents and initial symmetrical short-

circuit currents of three-phase distribution

transformers

100

Chapter 11

11/1 Factor n as a function of cos j and Icw 104

11/2 Rated diversity factors RDF for various load types 105

108 SIVACON S8 Planning Principles – Glossary and rated parameters

11.4 Index of ﬁgures

Fig. Title Page

Chapter 1

1.1 Totally Integrated Power (TIP) as holistic

approach to electric power distribution 4

1.2 SIVACON S8 for all areas of application 5

1.3 Use of SIVACON S8 in power distribution 6

Chapter 2

2/1 Cubicle design of SIVACON S8 9

2/2 Dimensions of enclosure parts 14

2/3 Integration of the corner cubicle 15

2/4 Variable busbar position for SIVACON S8 16

Chapter 3

3/1 Cubicles in circuit-breaker design 22

3/2 Forced cooling in a circuit-breaker cubicle 23

3/3 Cubicle types for direct supply and direct feeder

(refer to the text for explanations) 31

Chapter 4

4/1

Cubicles for universal mounting design: on the

left with front cable connection; on the right for

rear cable connection

4/2 Cubicle with forced cooling for universal

mounting design 35

4/3 Combination options for universal mounting

design 36

4/4

Equipment in ﬁxed-mounted design (left) and

connection terminals in the cable connection

compartment (right)

4/5

Design variants of the withdrawable units in

standard feature design (SFD; left) and high

feature design (HFD; right)

4/6 Positions in the SFD contact system 39

4/7 Normal withdrawable unit in SFD with a

withdrawable unit height of 100 mm 39

4/8 Open withdrawable unit compartments in SFD 40

4/9 Structure of a small withdrawable unit in HFD 41

4/10 Positions in the HFD contact system 41

4/11

Front areas usable for an instrument panel on

small withdrawable units with an installation

height of 150 mm

4/12

Front areas usable for an instrument panel on

small withdrawable units with an installation

height of 200 mm

4/13 Front areas usable for an instrument panel on

normal withdrawable units 43

4/14 Compartment for normal withdrawable unit in

HFD 44

4/15 Adapter plate for small withdrawable units 44

Chapter 5

5/1

Cubicles for in-line design, plug-in: on the left for

in-line switch-disconnectors 3NJ62 with fuses, on

the right for switch-disconnectors SASIL plus with

fuses

5/2 Pluggable in-line switch-disconnectors 3NJ62 51

5/3 Pluggable in-line switch-disconnectors SASIL plus 53

Fig. Title Page

Chapter 6

6/1 Cubicles for ﬁxed-mounted in-line design with

3NJ4 in-line switch-disconnectors 56

6/2 Cubicles for ﬁxed mounting with front cover 59

6/3

Installation of switching devices in ﬁxed-

mounted cubicles with a front cover (cover

opened)

6/4 Cable connections in ﬁxed-mounted cubicles

with a front cover 60

6/5 Mounting kit for modular installation devices

(without cover) 62

6/6 Cubicles for customized solutions 63

Chapter 7

7/1 Cubicle for reactive power compensation 66

7/2 Capacitor modules for reactive power

compensation 67

Chapter 8

8/1 Clearances to obstacles 72

8/2 Maintenance gangway widths and passage

heights 72

8/3 Minimum widths of maintenance gangways in

accordance with IEC 60364-7-729 73

8/4 Cubicle arrangement for single-front (top) and

double-front systems (bottom) 74

8/5 Permissible deviations of the installation area 75

8/6 Installation on raised ﬂoors 75

8/7 Foundation frame mounted on concrete 75

8/8 Mounting points of the single-front system 75

8/9 Mounting points of the single-front system 75

8/10 Mounting points for the corner cubicle 75

Chapter 9

9/1 Insulated main busbar in the SIVACON S8

(optional N insulation) 81

9/2 Arc barrier in SIVACON S8 81

9/3

Comparison of seismic scales for the

classiﬁcation of seismic response categories of

SIVACON S8

9/4 EC-Declaration of Conformity for SIVACON S8 in

respect of the Low Voltage and EMC Directives 86

9/5 Declaration of Conformity for SIVACON S8

regarding design veriﬁcation 87

9/6 Declaration of Conformity for SIVACON S8

regarding design veriﬁcation - Annex Page 1/2 88

9/7 Declaration of Conformity for SIVACON S8

regarding design veriﬁcation - Annex Page 2/2 89

Chapter 10

10/1 Systems according to the type of connection to

earth in accordance with IEC 60364-1 92

10/2 Double fault in the IT system 93

10/3 Double fault in the IT system 94

The information in this manual only includes general

descriptions and/or performance characteristics, which do

not always apply in the form described in a specific appli-

cation, or which may change as products are developed.

The required performance characteristics are only binding,

if they are expressly agreed at the point of conclusion of

the contract.

All product names may be trademarks or product names of

Siemens AG or supplier companies; use by third parties for

their own purposes could violate the rights of the owner.

Siemens AG

Energy Management

Medium Voltage & Systems

Mozartstr. 31c

D-91052 Erlangen

Germany

All data and circuit examples without engagement.

Subject to change without prior notice.

www.siemens.com/sivacon-s8

Order no.: IC1000-G320-A220-V3-7600