Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS ... - Siemens

Fixed-Mounted Circuit-Breaker 

Switchgear Type NXPLUS C 

up to 24 kV, SF 6 -Insulated 

Medium-Voltage 

Switchgear 

Catalog HA 35.41 

2003 

Invalid: 

Catalog HA 35.41 · 2001

R-HA35-105 eps 

Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS C up to 24 kV, SF6-Insulated 

Contents 

Application 

Page 

Types 

Application 

Types, typical uses, 

ratings 2 to 4 

Requirements 

Features, safety, technology 4 and 5 

Technical Data 

Electrical data 6 and 7 

Room planning 8 

Shipping data 9 

Dimensions 

Front views, sections, 

floor openings, fixing points 10 to 12 

Product Range 

Single-busbar panels 13 to 15 

Double-busbar panels 16 

Design 

Basic panel design 17 

Components 

Vacuum circuit-breaker 18 and 19 

Three-position switch 20 and 21 

HV HRC fuse assembly 22 and 23 

Vacuum contactor, motor protection 24 

Busbars 25 

Current and voltage transformers 26 and 27 

Panel connection 28 to 30 

Indicating and measuring equipment 31 to 33 

Standards 

Standards, specifications, guidelines 34 and 35 

Fixed-mounted circuitbreaker 

switchgear 

NXPLUS C is a factoryassembled, 

type-tested, 

metal-enclosed, metal-clad, 

SF 6 -insulated switchgear 

for single-busbar and 

double-busbar applications 

and indoor installation. 

Notes 

35 

Circuit-breaker panel (example) 

© Siemens AG 2003 

2 Siemens HA 35.41 · 2003






Application 

Typical uses 

Application 

Public power supply system 


Application 

Industry 

NXPLUS C switchgear 

20 kV (example) 

Application 

Industry 

Siemens HA 35.41 · 2003 3


Application 

Requirements 

Typical uses · Ratings 

Fixed-mounted circuit-breaker switchgear 

NXPLUS C is used in transformer 

and switching substations, e.g., in 

■ Power supply companies 

■ Power stations 

■ Cement industry 

■ Automobile industry 

■ Iron and steel works 

■ Rolling mills 

■ Mining industry 

■ Textile, paper and food industries 

■ Chemical industry 

■ Petroleum industry 

■ Pipeline installations 

■ Offshore installations 

■ Electrochemical plants 

■ Petrochemical plants 

■ Shipbuilding industry 

■ Diesel power plants 

■ Emergency power supply installations 

■ Lignite open-cast mines 

■ Traction power supply systems 

Electrical data (maximum values) and dimensions 

Rated voltage kV 7.2 12 15 17.5 24 

Rated frequency Hz 50/60 50/60 50/60 50/60 50/60 

Rated short-duration powerfrequency 

kV 20 28 36 1 ) 38 1 ) 50 

withstand voltage 

Rated lightning impulse kV 60 75 95 95 125 


Rated peak withstand current kA 80 80 80 63 63 

Rated short-circuit making kA 80 80 80 63 63 

current 

Rated short-time 

kA 31.5 31.5 31.5 25 25 

withstand current 3 s 

Rated short-circuit breaking kA 31.5 31.5 31.5 25 25 

current 

Rated normal current of busbar A 2500 2500 2500 2500 2500 

Rated normal current of A 2500 2500 2500 2000 2000 

feeders 

Width mm 600 2 ) 600 2 ) 600 2 ) 600 2 ) 600 2 ) 

Depth – without pressure 

relief duct at the rear 

– with pressure 

relief duct at the rear 

mm 

mm 

1100 

1225 

1100 

1225 

1100 

1225 

1100 

1225 

1100 

1225 

Height mm 2250 2250 2250 2250 2250 

Features 

Environmental independence 

Welded switchgear vessels 

made of stainless steel without 

seals make NXPLUS C switchgear 

• Insensitive to aggressive 

ambient conditions such as 

– Salt water 

– Air humidity 

– Dust 

– Temperature 

• Hermetically tight to ingress 

of foreign bodies such as 

– Dust 

– Dirt 

• Independent of site altitude 

Compact design 

Thanks to the SF 6 -insulation, 

compact dimensions are 

possible 

Thus, 

• Existing switchgear rooms 

can be used effectively 

• New constructions cost little 

• Costly city-area space is saved 

Maintenance-free design 

Switchgear vessels designed 

as sealed pressure systems, 

maintenance-free switching 

devices and enclosed cable 

plugs ensure 

• Maximized power supply 

reliability 

• Personnel safety 

• Sealed-for-life design according 

to IEC 60 298 (sealed 

pressure system) 

• Installation, operation, extension 

and replacement without 

SF 6 -gas work 

• Reduced operating costs 

• Cost-efficient investment 

• No maintenance cycles 

Innovations 

The use of digital secondary 

systems and combined 

protection and 

control devices ensure 

• Clear integration in process 

control systems 

• Flexible and highly simplified 

adaptation to new 

system conditions and 

thus to cost-efficient 

operation 

1) 42 kV according to some 

international requirements 

2) 1200 mm for rated normal 

feeder currents of 2000 A, 

2300 A and 2500 A 



Requirements 

Safety 

Technology 

Personal safety 

• Safe-to-touch and hermetically 

sealed primary enclosure 

• All high-voltage parts including 

the cable terminations, 

busbars and voltage transformers 

are surrounded by 

earthed layers or metal enclosures 

• Capacitive voltage detection 

system for verification of safe 

isolation from supply 

• Operating mechanisms and 

auxiliary switches safely accessible 

outside the primary 

enclosure (switchgear vessel) 

• Protective system interlock to 

prevent operation when the 

switchgear enclosure is open 

• Standard degree of protection 

IP 65 for all high-voltage 

parts of the primary circuit, 

IP 3XD for the switchgear 

enclosure according to 

IEC 60 529 and VDE 0470 

Part 1 

• High resistance to internal 

arcs by logical mechanical 

interlocks and tested 

switchgear enclosure 

• Arc-fault tested panels 

according to IEC 60 298 and 

VDE 0670 Part 6, Criteria 1 

to 6 

• Logical mechanical interlocks 

prevent maloperation 

• Make-proof earthing by 

means of the vacuum circuitbreaker 

Security of operation 

• Hermetically sealed primary 

enclosure independent of 

environmental effects (dirt, 

moisture and small animals) 

• Maintenance-free in an 

indoor environment 

(IEC 60 694 and VDE 0670 

Part 1000) 

• Operating mechanisms of 

switching devices accessible 

outside the primary enclosure 

(switchgear vessel) 

• Metal-enclosed, plug-in inductive 

voltage transformers 

mounted outside the gas 

compartments 

• Ring-core current transformers 

mounted outside the gas 

compartments 

• Complete logical mechanical 

interlocking system 

• Welded switchgear vessels, 

sealed for life 

• Minimum fire load 

• Type and routine-tested 

• Standardized, NC production 

processes 

• Quality assurance in accordance 

with DIN EN ISO 9001 

• More than 300,000 

switchgear panels of Siemens 

in operation worldwide for 

many years 

• Option: Aseismic design 

Reliability 

• Type and routine-tested 

• Standardized, NC production 

processes 

• Quality assurance in accordance 

with DIN EN ISO 9001 

• More than 300,000 

switchgear panels of Siemens 

in operation worldwide for 

many years 

General 

• Three-pole enclosure of the 

primary part consisting of a 

switchgear vessel made of 

stainless steel 

• Insulating gas SF 6 

• Three-position switch as 

busbar disconnector and 

feeder earthing switch 

• Make-proof earthing by 

means of the vacuum circuitbreaker 

• Compact dimensions due to 

SF 6 -insulation 

• Hermetically welded switchgear 

vessel made of stainless 

steel without seals 

• Single-pole, solid-insulated, 

screened busbars, plug-in type 

• Cable connection with outside-cone 

plug-in system, or 

for connection of solid-insulated 

bars 

• Wall-standing or free-standing 

arrangement 

• Cable connection access from 

front or rear 

• Installation and extension of 

existing switchgear on both 

sides without gas work and 

without modification of existing 

panels 

Interlocks 

• According to IEC 60 298 and 

VDE 0670 Part 6 

• Logical mechanical interlocks 

prevent maloperation 

• Circuit-breaker or contactor 

can only be operated with 

three-position switch in end 

position and operating lever 

removed 

• Three-position switch-disconnector 

not interlocked in circuit-breaker 

panels £ 630 A 

and in switch-disconnector, 

contactor, ring-main and 

metering panels due to its 

own switching capacity 

• Three-position disconnector 

interlocked against the circuit-breaker 

in circuit-breaker 

panels > 630 A and in bus 

sectionalizers with one panel 

width 

• Cable compartment cover 

(access to HV HRC fuses) 

always interlocked against 

the three-position switchdisconnector 

in panels with 

HV HRC fuses (switch-disconnector, 

metering and 

contactor panels) 

• Option: Three-position 

switch-disconnector in circuitbreaker 

panels £ 630 A can 

only be operated with circuitbreaker 

in OPEN position 

• Option: Cable compartment 

cover interlocked against the 

three-position switch 

• Option: Electromagnetic 

interlocks 

• Option: Actuating openings 

can be locked with padlocks 

Modular design 

• Panel replacement possible 

without SF 6 -gas work 

• Low-voltage compartment 

can be removed, plug-in bus 

wires 

Instrument transformers 

• Current transformers not 

subjected to dielectric stress 

• Easy replacement of ring-core 

current transformers 

• Metal-enclosed, plug-in and 

disconnectable voltage transformers 

Vacuum circuit-breaker 

• Maintenance-free under 

normal ambient conditions 

according to IEC 60 694 and 

VDE 0670 Part 1000 

• No relubrication or readjustment 

• Up to 10,000 operating 

cycles 

• Vacuum-tight for life 

Secondary systems 

• Standard protection, 

measuring and control 

equipment 

• Option: Digital multifunction 

protection relay with integrated 

protection, control, 

communication, operating 

and monitoring functions 

• Can be integrated in process 

control systems 

Siemens HA 35.41 · 2003 

5



Electrical data, filling pressure, temperature for single-busbar switchgear 

Common 

electrical data, 

filling pressure 

and 

temperature 

Rated insulation level Rated voltage U r kV 7.2 12 15 17.5 24 

Rated short-duration power-freq. withstand voltage U d : 

– phase-to-phase, phase-to-earth, open contact gap kV 20 28 36 1 ) 38 1 ) 50 

– across the isolating distance kV 23 32 39 1 ) 45 1 ) 60 

Rated lightning impulse withstand voltage U p : 

– phase-to-phase, phase-to-earth, open contact gap kV 60 75 95 95 125 

– across the isolating distance kV 70 85 110 110 145 

Rated frequency f r 

50/60 Hz 

Rated normal current I 2 r ) for the busbar A 2500 2500 2500 2500 2500 

Rated filling pressure p 3 re ) 150 kPa (absolute) at 20 °C 

Minimum operating pressure p 3 me ) 130 kPa (absolute) at 20 °C 

Ambient temperature – 5 °C to +55 °C 

Panel data 

Circuit-breaker 

panel 

630 A 


panel and bus 

sectionalizer 

1000 A 

1250 A 

2000 A 

2300 A 

2500 A 

Switchdisconnector 

panel 

(with HV HRC 

fuses) 

Ring-main 

panel 

(switchdisconnector 

panel without 

HV HRC fuses) 

Disconnector 

panel 

1000 A 

1250 A 

2000 A 

2300 A 

2500 A 

Contactor 

panel 

(with HV HRC 

fuses) 

Rated normal current I 2 r ) A 630 630 630 630 630 

Rated short-time for switchgear with t k = 1 s up to kA 20 25 20 25 20 25 20 25 20 

withstand current I k for switchgear with t k = 3 s up to kA 20 – 20 – 20 – 20 – 20 

Rated peak withstand current I p up to kA 50 63 50 63 50 63 50 63 50 

Rated short-circuit making current I ma up to kA 50 63 50 63 50 63 50 63 50 

Rated short-circuit breaking current I sc up to kA 20 25 20 25 20 25 20 25 20 

Electrical service life of at rated normal current 

10,000 operating cycles 

vacuum circuit-breakers at rated short-circuit breaking current 

50 breaking operations 

Rated normal current I r 2 ) 

Rated short-time for switchgear with t k = 1 s up to kA 31.5 31.5 31.5 25 25 

withstand current I k for switchgear with t k = 3 s up to kA 31.5 31.5 31.5 25 25 

Rated peak withstand current I p up to kA 80 80 80 63 63 

Rated short-circuit making current I ma up to kA 80 80 80 63 63 

Rated short-circuit breaking current I sc up to kA 31.5 31.5 31.5 25 25 





with t = 1 s up to 

Rated normal current I 2 r ) for feeder 4 ) A 630 630 630 630 630 

Rated short-time for switchgear kA 31.5 31.5 31.5 25 25 

withstand current I k 

k 

for switchgear with t k = 3 s up to kA 31.5 31.5 31.5 25 25 

Rated peak withstand current I 4 p ) uptokA 80 80 80 63 63 

Rated short-circuit making current I 4 ma ) uptokA 80 80 80 63 63 

Dimension ”e” of HV HRC fuse links mm 292 5 ) 292 5 ) 442 442 442 

with t = 1 s up to 25 25 25 25 

Rated normal current I 2 r ) for feeder A 630 630 630 630 630 

Rated short-time for switchgear kA 20 20 20 20 20 


k 

for switchgear with t k = 3 s up to kA 20 – 20 – 20 – 20 – 20 

Rated peak withstand current I p up to kA 50 63 50 63 50 63 50 63 50 

Rated short-circuit making current I ma up to kA 50 63 50 63 50 63 50 63 50 





with t = 1 s up to 

Rated normal current I 2 r ) for feeder 4 ) A 400 400 400 400 400 

Rated short-time for switchgear kA 31.5 31.5 31.5 25 25 


k 

for switchgear with t k = 3 s up to kA 31.5 31.5 31.5 25 25 


Rated short-circuit making current I 4 ma ) uptokA 80 80 80 63 63 

Electrical service life at rated normal current 

100,000 or 500,000 operating cycles 

Dimension ”e” of HV HRC fuse links mm 292 5 ) 292 5 ) 442 442 442 

A 

A 

A 

A 

A 

A 

A 

A 

A 

A 

1000 

1250 

2000 

2300 

2500 

1000 

1250 

2000 

2300 

2500 

1000 

1250 

2000 

2300 

2500 

1000 

1250 

2000 

2300 

2500 

1000 

1250 

2000 

2300 

2500 

1000 

1250 

2000 

2300 

2500 

1000 

1250 

2000 

1000 

1250 

2000 

1000 

1250 

2000 

1000 

1250 

2000 

Metering panel 

(with HV HRC 

fuses) 

6 Siemens HA 35.41 · 2003 




Dimension ”e” of HV HRC fuse links mm 292 5 ) 292 5 ) 442 442 442



Electrical data, filling pressure, temperature for double-busbar switchgear 

Common 

electrical data, 

filling pressure 

and 

temperature 

Rated insulation level Rated voltage U r kV 7.2 12 15 17.5 24 

Rated short-duration power-freq. withstand voltage U d : 

– phase-to-phase, phase-to-earth, open contact gap kV 20 28 36 1 ) 38 1 ) 50 

– across the isolating distance kV 23 32 39 1 ) 45 1 ) 60 

Rated lightning impulse withstand voltage U p : 

– phase-to-phase, phase-to-earth, open contact gap kV 60 75 95 95 125 

– across the isolating distance kV 70 85 110 110 145 

Rated frequency f r 

50/60 Hz 

Rated normal current I 2 r ) for the busbar A 2000 2000 2000 2000 2000 

Rated filling pressure p 3 re ) 150 kPa (absolute) at 20 °C 

Minimum operating pressure p 3 me ) 130 kPa (absolute) at 20 °C 

Ambient temperature – 5 °C to +55 °C 

Panel data 


panel 

1000 A 

1250 A 

Incoming 

sectionalizer, 

bus coupler 

Further 

panel types 


Rated short-time for switchgear with t k = 1 s up to kA 25 25 25 25 25 

withstand current I k for switchgear with t k = 3 s up to kA 25 25 25 25 25 



Rated short-circuit breaking current I sc up to kA 25 25 25 25 25 





Rated normal current I 2 r ) A 1250 1250 1250 1250 1250 

Rated short-time for switchgear with t k = 1 s up to kA 25 25 25 25 25 

withstand current I k for switchgear with t k = 3 s up to kA 25 25 25 25 25 



Rated short-circuit breaking current I sc up to kA 25 25 25 25 25 





The above-mentioned panel types can on request be combined 

with panel types of the single-busbar range. 

A 

A 

1000 

1250 

1000 

1250 

1000 

1250 

1000 

1250 

1000 

1250 

Footnotes for pages 6 and 7 

1) Higher values for rated shortduration 

power-frequency 

withstand voltage available with: 

– 42 kV for phase-to-phase, 

phase-to-earth, open contact 

gap as well as 

– 48 kV across the isolating 

distance 

2) The rated normal currents apply 

to ambient temperatures of 

max. 40 °C. The 24-hour mean 

value is max. 35 °C 

(acc. to IEC 60 694 / VDE 0670 

Part 1000) 

3) Pressure values for SF 6 -insulated 

switchgear vessels 

4) Depending on the HV HRC fuse 

link, observe max. cut-off current 

of HV HRC fuse links 

5) Extension tube (150 mm long) 

required additionally 


7



Room planning 

Switchgear arrangement 

• For single-busbar applications: 

Room planning for single-busbar switchgear 

– Wall-standing arrangement 

or 

– Free-standing arrangement 

– Face-to-face arrangement 

accordingly 

• For double-busbar applications: 

– Back-to-back arrangement 

(free-standing arrangement) 

Room dimensions 

See opposite dimension 

Wall-standing arrangement (top view) 

drawings 

Panels without pressure relief duct 

Door dimensions 

The door dimensions depend 

on the number of panels in one 

transport unit 

Switchgear fastening 

• For floor openings and fixing 

points of the switchgear, 

see pages 10 to 12 

• Foundations: 

– Steel structure 

– Steel-reinforced concrete 

with foundation rails, 

welded or bolted on 

Panel dimensions 

See pages 10 to 12 

Weights 

• Panels for £ 1250 A: 

Approx. 700 kg 

• Panels for > 1250 A: 

Approx. 1100 kg 

 

B**** B**** 

52 

Room height 

52 

³50*** ³ 2800 mm 

³500*** 

Wall-standing arrangement 

(same as left side), but panels 

with pressure relief 

B**** 

B**** 

52 

Room height 

52 

³50*** ³ 2800 mm ³500*** 

duct 

Free-standing arrangement (top view) 

 


125* 

* 125-mm-deep pressure relief duct 

at the rear 

** For panel replacement: Control aisle 

³ 1400 mm recommended 

*** Lateral wall distances 

³ 50 mm and ³ 500 mm optionally 

possible on left or right side 

**** For panel width “B”, see dimensions 

on pages 10 to 12 

125 

1100 

³800** 

³500 

³800** 1225 

HA35-2529d eps 

1225 ³50 

HA35-2530b eps 

125* 

1100



Shipping data for single-busbar switchgear 

Transport 

NXPLUS C switchgear is delivered 

in form of individual panels. 

In special cases, transport units 

with a length of up to 2400 mm 

can be combined – and put 

together in one crate, if applicable. 

The following must be noted 

when defining transport units: 

• Transport facilities on site 

• Transport dimensions and 

weights 

• Size of door openings in 

building 

Transport dimensions 

Panel width 

mm 

Transport dimensions 

Width x Height x Depth 

mm x mm x mm 

Transport inside Germany or to other European countries 

1 x 600 1150 x 2450 x 1350 

2 x 600 or 1 x 1200 1550 x 2450 x 1350 

3x600or1x600+1x1200 2150 x 2450 x 1350 

4x600or2x600+1x1200 2750 x 2450 x 1350 

Transport overseas 

1 x 600 1150 x 2650 x 1350 

2 x 600 or 1 x 1200 1550 x 2650 x 1350 

3x600or1x600+1x1200 2150 x 2650 x 1350 

4x600or2x600+1x1200 2750 x 2650 x 1350 

Packing 

Place of destination inside 

Germany or other European 

countries 

• Method of transport: 

Rail and truck 

• Type of packing: 

– Panels on open pallets 

– Open packing with PE 

protective foil 

Transport weights * 

Panel width 

Transport weight 

with 

without 

packing packing 

mm 

approx. kg approx. kg 

1 x 600 700 600 

2 x 600 or 1 x 1200 1400 1200 

3x600or1x600+1x1200 2100 1800 

4x600or2x600+1x1200 2800 2400 

Place of destination overseas 

• Method of transport: 

Ship 

• Type of packing: 

– Panels on open pallets 

– In closed crates with sealed 

upper and lower PE 

protective foil 

– With desiccant bags 

– With sealed wooden floor 

– Max. storage time: 6 months 

* Average values depending on the 

equipping degree of the panels 


9


Dimensions 

Front views, sections, floor openings, fixing points for single-busbar switchgear 

Circuit-breaker panels 

Disconnector panels 

702 

2250 

21726 

409 

761 

2 

409 

HA35-2504a eps 

761 


702 

1726 

2250 

600 

125 

1100 

600 

125 

1100 

1200 ³ 50 

920 280 

25 

30 

180 

3 

1 

46 

2 

100 

4 

100 

600 

125 

700 420 

3 

30 

£ 1250 A £ 1250 A 

1 Floor opening 

for control cables 

2 Option: Pressure 

relief duct 

3 Fixing point 


for high-voltage 

cables 

1200 ³ 50 

920 280 

25 

30 

180 

3 

1 

46 

2 

100 

4 

100 

600 

125 

3 

30 

420 

700 




relief duct 




cables 

409 

409 


702 


702 

2250 

21726 

2250 

21726 

761 

761 

1200 125 

1100 

1200 125 

1100 

1200 ³ 50 

920 280 

25 

30 

180 

3 

1 

46 

100 

2 

4 

1200 

100 

125 

700 420 

3 

30 

2000 A, 2300 A 

and 2500 A 




relief duct 




cables 

1200 ³ 50 

920 280 

25 

30 

180 

3 

1 

46 

100 

2 

4 

1200 

100 

125 

700 420 

3 

30 

2000 A, 2300 A 

and 2500 A 




relief duct 




cables 

10 

Siemens HA 35.41 · 2003


Dimensions 


Bus sectionalizers 

with disconnector before the circuit-breaker 


with disconnector before and after the circuit-breaker 

2 

409 

761 

2 

409 



1726 

761 

1726 

2250 

2250 

600 

125 

1100 

600 

125 

1100 

1200 ³ 50 

920 280 

30 

180 

3 

1 

2 

100 

125 

700 420 

3 

30 

£ 1250 A 

1 panel width 




relief duct 


1200 ³ 50 

920 280 

30 

180 

3 

1 

2 

100 

125 

700 420 

3 

30 

£ 1250 A 

1 panel width 




relief duct 


25 

46 

100 

600 

25 

46 

100 

600 

409 

409 

2250 

21726 

2250 

21726 

761 

761 

1200 ³ 50 

920 280 

180 30 


3 

1 

100 

1200 125 

2 

125 

700 420 

3 

30 

1100 

2000 A, 2300 A 

and 2500 A 

1 panel width 




relief duct 


1200 ³ 50 

920 280 


30 

180 

3 

1 

100 

1200 125 

2 

125 

700 420 

3 

30 

1100 

£ 1250 A 

2 panel widths 




relief duct 


25 

46 

1200 

100 

25 

46 

1200 

100 




Switch-disconnector panel with HV HRC fuses 


450 

2250 

21726 

409 


702 

2250 

761 

21726 

409 

761 

600 

125 

1100 

600 

125 

1100 

1200 ³ 50 

920 280 

30 

180 

3 

1 

2 

100 

4 

125 

700 420 

3 

30 

1200 ³ 50 

920 280 

30 

180 

3 

1 

2 

100 

4 

125 

700 420 

3 

30 

25 

46 

100 

600 

25 

46 

100 

600 


450 

2250 

21726 

409 

761 

5 


2250 

21726 

Dimensions 

Ring-main panel 

(switch-disconnector panel without HV HRC fuses) 




relief duct 




cables 




relief duct 




cables 

Contactor panel with HV HRC fuses 


409 

761 

600 

125 

1100 

600 

125 

1100 

1200 ³ 50 

920 280 

25 

30 

180 

3 

1 

46 

2 

100 

4 

100 

600 

125 

700 420 

3 

30 




relief duct 




cables 

5 Option: 

HV HRC fuses 

1200 ³ 50 

920 280 

25 

30 

180 

3 

1 

46 

2 

100 

100 

600 

125 

700 420 

3 

30 




relief duct 




Product Range 

Single-busbar panels 


Three-position 

switch-disconnector 


disconnector 

Vacuum 

circuit-breaker 


630 A 

1 ) 

HA35-2490 eps 

1 ) 

2000 A, 2300 A and 2500 A 

1 ) 

Plug-in voltage 

transformer 

Current transformer 

Capacitive voltage 

detection system 


Disconnectable and 

plug-in voltage transformer 

Forced ventilation 

at 2500 A 

Busbar earthing 

switch 

1 ) 

Surge arrester 

or limiter 

HA35-2489 eps 

Max. 2 or 3 outside-cone 

plugs (not included in 

the scope of supply) 

1 plug thereof replaceable 

by surge arrester or limiter 

1000 A and 1250 A 

Max. 6 outside-cone 



2 plugs thereof replaceable 


1) Rated normal current 

of busbar £ 1250 A 

(> 1250 A on request) 


13


Product Aufbau Range 


Disconnector panels 



disconnector 

Vacuum 


1 ) 


transformer 

1 ) 


£ 1250 A, 1 panel width 




HA35-2491 eps 

1000 A and 1250 A 




Forced ventilation 

at 2500 A 

1 ) 


or limiter 

HA35-2494 eps 

HA35-2492 eps 

£ 1250 A, 2 panel widths 









2 plugs thereof replaceable 


2000 A, 2300 A and 2500 A 




HA35-2495 eps 

2000 A, 2300 A and 2500 A, 1 panel width 



Product Range 


Switch-disconnector panel 

Ring-main panel 



Vacuum contactor 

HV HRC fuses 

1 ) 

1 ) 

Outside-cone plug 

(not included in the 

scope of supply) 

1 ) 

HA35-2496 eps 

HA35-2498 eps 


transformer 




Contactor panel 






transformer 


or limiter 

1 ) 

2 ) 

2 ) 



2nd outside-cone plug 

(not included in the 

scope of supply) 





15


Product Range 

Double-busbar panels 


Incoming sectionalizer 

SS2 

SS1 

SS2 

SS1 


disconnector 

Vacuum 


1 ) 


transformer 

1 ) 1 ) 

1 ) 1 ) 


transformer, 

mounted separately 

HA35-2500 eps 

HA35-2502 eps 


1000 A and 1250 A 

Single-busbar panel, prepared for later 

extension to double-busbar panel: 

1000 A and 1250 A 

Bus coupler 






SS2 

SS1 


or limiter 






1 ) 

1 ) 1 ) 

Panel bars 

HA35-2501 eps 

1000 A and 1250 A 

HA35-2503 eps 




Abbreviations 

SS1 = Busbar 1 

SS2 = Busbar 2 



Design 

Basic panel design 

Insulating system 

• Switchgear vessel filled with SF 6 -gas 

• Features of SF 6 -gas: 

– Non-toxic 

– Odourless and colourless 

– Non-inflammable 

– Inert 

– Heavier than air 

– Electronegative (high-quality 

insulator) 

• Pressure of SF 6 -gas in the 

switchgear vessel: 

– Rated filling pressure: 150 kPa 

– Design pressure: 180 kPa 

– Design temperature 

of SF 6 -gas: 80 °C 

– Operating pressure of rupture 

diaphragm: ³ 300 kPa 

– Bursting pressure: ³ 400 kPa 

Panel design 

• Factory-assembled, type-tested 

• Metal-enclosed, metal-clad 

• Hermetically welded switchgear 

vessel made of stainless steel, 

without seals 

• Single-pole, solid-insulated, 

screened busbars, plug-in type 

• Maintenance-free 

• Degree of protection 

– IP 65 for all high-voltage parts 

of the primary circuit 

– IP 3XD for the switchgear enclosure 

• Vacuum circuit-breaker and 

vacuum contactor 

• Three-position disconnector for 

disconnecting and earthing by means 

of the circuit-breaker 

• Make-proof earthing by means 

of the vacuum circuit-breaker 

• Three-position switch-disconnector 

• Cable connection with 

outside-cone plug-in system 

according to DIN EN 50 181 

• Wall-standing or free-standing 

arrangement 

• Installation and possible later extension 

of existing panels without gas 

work 

• Replacement of switchgear vessel 

without gas work 

• Replacement of instrument transformers 

without gas work, as they 

are mounted outside the gas 

compartments 

• Enclosure made of galvanized 

sheet-steel, front cover and end 

walls painted in colour ”light basic” 

• Low-voltage compartment removable, 

plug-in bus wires 

• Lateral, metallic wiring ducts for 

control cables 

1 

2 

Z 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

HA35-2516 eps 

Circuit-breaker panel (example) 

Front view 

Detail Z: 

15 

16 

17 

18 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

1 Low-voltage 

compartment 

2 Multifunction protection 

relay SIPROTEC 4 (example) 

3 Switch position indication 

for circuit-breaker 

4 Actuating opening for 

charging the circuitbreaker 

springs 

5 ON pushbutton for 


6 ”Spring charged” 

indication 

7 Operating cycle counter 

for circuit-breaker 


for ”disconnecting” 

function of three-position 

switch 

9 Ready-for-service 

indication 

Sectional view (cable connection from the front) 

10 Switch position 

indication for ”ready-toearth” 

function of 


11 Control gate and 

locking device for 

”disconnecting/earthing” 

functions of threeposition 

switch 

12 Circuit-breaker 

interrogation lever 

13 Actuating opening 

for ”disconnecting” 


switch 

14 Actuating opening 

for ”ready-to-earth” 


switch 

15 Option: Busbar voltage 

transformer, plug-in type 

16 Busbars, single-pole, 

fully-insulated, plug-in 

type, earthed on the 

outside 

17 Option: Busbar current 

transformer 

18 Switchgear vessel, 

hermetically welded, 

filled with SF 6 -gas 

19 Three-position 

disconnector 

20 OFF pushbutton for 


Siemens HA 35.41 · 2003 17 

1 

30 

31 

32 

33 

34 

21 Vacuum interrupter of 


22 Pressure relief 

(rupture diaphragm) 

23 Capacitive voltage 


24 Locking device for 

”feeder earthed” (suitable 

for locking with padlock) 

25 Disconnecting facility for 

feeder voltage transformer 

26 Bushing for feeder voltage 

transformer 

27 Option: Feeder voltage 

transformer 

28 Option: Pressure relief duct 

29 Cable connection 

compartment 

30 Operating mechanism for 


31 Circuit-breaker operating 

mechanism 

32 Feeder current transformer 

33 Cable connection with 

outside-cone T-plug 

34 Operation of disconnecting 

facility of the feeder voltage 

transformer



Components 


Features 

• According to IEC 60 056 

and VDE 0670 Parts 101 

to 106 (standards see 

page 34) 

• Application in hermetically 

welded switchgear vessel in 

conformity with the system 

• Climate-independent 

vacuum interrupter poles 

in the SF 6 -filled 

switchgear vessel 

• Maintenance-free for use 

indoors according to 

IEC 60 694 and VDE 0670 

Part 1000 

• Individual secondary equipment 

• A metal bellows is used for 

gasketless separation of the 

SF 6 -insulation and the 

operating mechanism – as 

already used with success 

for over 100,000 vacuum 

interrupters 

Switching duties and 

operating mechanisms 

The switching duties of the 

vacuum circuit-breaker are 

dependent, among other 

factors, on its type of 

operating mechanism. 

Motor operating 

mechanism 

• Motor operating storedenergy 

mechanism 

– For auto-reclosure (K) 

– For synchronization and 

rapid load transfer (U) 

Further operating 

mechanism features 

• Located outside the 

switchgear vessel in the 

operating mechanism box 

and behind the control 

board 

• Stored-energy springoperated 

mechanism for 


Operating mechanism 

functions 

Motor operating 

mechanism 1 ) (M1 *) 

In the case of the motor 

operating mechanism, the 

closing spring is charged by 

means of a motor and latched 

in the charged position 

(the ”spring charged” indication 

is visible). Closing is effected 

either by means of an 

ON pushbutton or a closing 

solenoid. The closing spring 

is recharged automatically 

(for auto-reclosure). 

1 

2 

3 


4 

5 

6 


(operating mechanism open) 

1 Gear with motor (M1 *) 

2 Position switch (S4 *) 

3 Closing spring 

4 ”Closing spring charged” 

indication 

5 Closing solenoid (Y9 *) 

6 Operating cycle counter 

7 Auxiliary switch 6NO+6NC 

(S1 *), option: 12NO+12NC 


CLOSE/OPEN for circuit-breaker 

9 Option: 2 nd release 

10 1 st release (Y1 *) 

11 Locking device for 

”feeder earthed” 

12 13 14 15 16 17 18 

7 

8 

9 

10 

11 

Trip-free mechanism 

The vacuum circuit-breaker 

is fitted with a trip free 

mechanism according to 

IEC 60 056 and VDE 0670. 

HA35-2276d eps 

Section through the vacuum circuit-breaker 

19 

12 Fixed terminal 

13 Pole support 

14 Vacuum interrupter 

15 Moving terminal 

16 Metal bellows 


SF 6 -insulated, with vacuum 

interrupter 

18 Operating mechanism box 

(see above figure) 

19 Operating kinematics 

Abbreviations for 

switching duties 

and applications: 

U = Synchronization and 

rapid load transfer 

(make time £ 90 ms) 

K = Auto-reclosure 

1) Motor power consumption at 

24 V to 220 V DC: 350 W 

110 V and 220 V AC: 400 VA 

* Equipment identification 

code 

For further technical data and description of typical applications, 

please refer also to Catalog HG 11.11 ”3AH Vacuum Circuit-Breakers” 

18 



Components 


Switching frequency of the vacuum interrupter 

Permissible operating cycles 

20000 

10000 

5000 

2000 

1000 

500 

200 

100 

50 

20 

10 

1 2 5 10 20 kA 50 

25 

Breaking current (r.m.s. value) 

Electrical data 

Rated voltage 24 kV 

Rated short-circuit breaking current £ 25 kA 

Rated normal current £ 2000 A 

Permissible operating cycles 

20000 

10000 

5000 

2000 

1000 

500 

200 

100 

50 

20 

10 

1 2 5 10 20 kA 50 

31.5 

Breaking current (r.m.s. value) 


Rated voltage 15 kV 

Rated short-circuit breaking current £ 31.5 kA 

Rated normal current £ 2500 A 

Rated switching sequences 

O-t-COorO-t-CO-t’-CO with motor operating stored-energy 

mechanism version 

HA35-2539 eps 

HA35-2540 en eps 

Secondary equipment 

The scope of the secondary 

equipment of the vacuum 

circuit-breaker depends on the 

type of application and offers a 

wide range of variations, thus 

allowing even the highest 

requirements to be satisfied: 

Closing solenoid 

• Type 3AY15 10 (Y9 *) 

• For electrical closing 

Shunt releases 

• Types: 

– Standard: 3AY15 10 (Y1 *) 

–Option: 3AX11 01 (Y2 *), 

with energy store 

• Tripping by protection relay or 

electrical actuation 

Current-transformer operated 

release 

• Type 3AX11 04 (Y6 *) for 

tripping pulse W 0.1 Ws in 

conjunction with suitable protection 

systems 

• Used where no external 

auxiliary voltage is available, 

tripping by protection relay 

Undervoltage release 

• Type 3AX11 03 (Y7 *) 

• Comprising: 

– Energy store and unlatching 

mechanism 

– Electromagnetic system, to 

which voltage is permanently 

applied in the CLOSED 

position of the vacuum 

circuit-breaker; tripping is 

initiated when this voltage 

drops 

• Connection to voltage transformers 

possible 

Anti-pumping 

(mechanical and electrical) 

• Function: If CLOSE and OPEN 

commands are applied simultaneously 

and continuously to 

the vacuum circuit-breaker, 

this reverts to its OPEN position 

subsequent to closing. 

The circuit-breaker remains in 

this position until a new 

CLOSE command is given. 

Thus continuous closing and 

opening (= pumping) is 

obviated. 

Circuit-breaker tripping signal 

• For electrical signalling 

(as pulse > 10 ms), e.g. to remote 

control systems, in the 

case of spontaneous tripping 

(e.g. protection) 

• Via limit switch (S6 *) and 

cut-out switch (S7 *) 

Varistor module 

• To limit overvoltages to 

approx. 500 V for protection 

devices (when inductive 

devices are mounted in the 

vacuum circuit-breaker) 

• For auxiliary voltages 

W 60VDC 

Auxiliary switch 

• Type 3SV9 (S1 *) 

• Standard: 6NO+6NC, 

of which 3NO+4NC contacts 

are free 1 ) 

• Option: 12NO+12NC, 

of which 9NO+6NC contacts 

are free 1 ) 

Position switch 

• Type 3SE4 (S4 *) 

• For signalling ”closing spring 

charged” 

Mechanical interlocking 

• Mechanical interlocking 

– to the three-position 

disconnector 

– to the three-position 


£ 630 A (option) 

• During operation of the 

three-position switch, the 

vacuum circuit-breaker 

cannot be operated 

O = OPEN operation 

CO = CLOSE operation with subsequent OPEN 

operation at the shortest internal closeopen 

time of the vacuum circuit-breaker 

t = Dead time 0.3 s 

t ‘ = Dead time 3 min 

1) For utilization 

by the 

customer 

* Equipment 

identification 

code 

Abbreviations: NO = normallyopen 

contact 

NC = normallyclosed 

contact 


R-HA35-047 eps R-HA35-040a eps 


Components 

Three-position switch 

Common features 

• According to 

IEC 62 271-102 and 


(Standards see page 34) 


welded switchgear 

vessel in conformity with 

the system 


switching elements in the 

SF 6 -filled switchgear 

vessel 



IEC 60 694 and VDE 0670 

Part 1000 

• Individual secondary 

equipment 

• A metal bellows is used 

for gasketless separation 

of the SF 6 -insulation and 

the operating mechanism 

– as already used with 

success for over 100,000 

vacuum interrupters 


disconnector 

• Application in 

– Circuit-breaker panel from 

1000 A to 2500 A 

(standard: with interlock 

against the circuit-breaker) 

– Disconnector panel from 

1000 A to 2500 A 

– Bus sectionalizer from 

1000 A to 2500 A 

• 1000 mechanical operating 

cycles for CLOSED / 

OPEN / EARTHED 

• Compact design due to 

short contact gaps in 

SF 6 -gas 

• Operation via gas-tight 

welded bushing at the 

front of the switchgear 

vessel 

• Reliable switch position 

up to the operating front 

of the panel 




– Circuit-breaker panel 630 A 

(interlock against the 

circuit-breaker not 

necessary) 

– Switch-disconnector panel 

– Ring-main panel 

– Contactor panel 

– Metering panel 

• 1000 mechanical operating 

cycles for CLOSED / 

OPEN / EARTHED 

• Switching functions as 

general-purpose switchdisconnector 

(Class E3) 

according to 

– IEC 60 265-1 

– VDE 0670 Part 301 

– IEC 62 271-102 

– VDE 0670 Part 2/EN 60 129 

(Standards see page 34) 

• Designed as a multi-chamber 

switch incorporating 

the functions 

– Switch-disconnector and 

– Make-proof earthing 

switch 

• Additional switch-disconnector 

functions: 

– 10 closing operations at 

rated short-circuit making 

current (demanded 

according to IEC / VDE: 

2 closing operations) 

– 100 operating cycles at 

rated normal current 

1 

2 

3 

4 

Switch positions of the three-position switches 

Three-position disconnector 

Switch positions 

(in OPEN position) 

with vacuum circuit-breaker arranged below 

(view into the switchgear vessel opened at the rear) 

1 Fixed contact at the busbar 

2 Swinging contact blade 

3 Fixed contact for ”feeder EARTHED” 

4 Operating shaft 

5 

6 

7 

8 

Three-position switch-disconnector 

(exploded view) 

5 Fixed contacts to earth 

6 Rotary contact blade 

7 Operating shaft 

8 Fixed contact to the feeder 

9 Fixed contact to the busbar 

5 

9 

HA35-2518 eps 

HA35-2519 eps 

CLOSED 

OPEN 

Feeder 

EARTHED 

CLOSED 

OPEN 

Feeder 

EARTHED 


20 



Components 

Three-position switch 

Interlocks 

• Selection of permissible 

switching operations by 

means of a control gate 

with mechanically interlocked 


• Corresponding operating 

shafts are not released 

at the operating front 

until they have been preselected 

with the control 

gate 

• Operating lever cannot 

be removed until switching 

operation has been 

completed 

• Circuit-breaker cannot be 

closed until control gate 

is in neutral position 

again 

• Switchgear interlocking 

system possible with 

electrical interlocks if 

switchgear is equipped 

with motor operating 

mechanisms (mechanical 

interlocking for manual 

operation remains) 


• ”CLOSED”, ”OPEN”, 

”EARTHED” 

In circuit-breaker panels, the 

cable connection is earthed 

and short-circuited by 

closing the vacuum circuitbreaker 

Operating mechanism 

• Spring-operated mechanism 

operated via operating 

lever (slip-on lever) at 

the operating front of the 

panel 

• Separate operating shafts 

for the functions 

DISCONNECTING and 

EARTHING 

• Option: Motor operating 

mechanism 

• Spring-operated/storedenergy 

mechanism for the 


function with fuses: 

Opening spring 

pre-charged (after closing) 

• Maintenance-free due to 

non-rusting design of 

parts subjected to 

mechanical stress 

• Bearings which require no 

lubrication 

Transmission principle for 

operating mechanisms 

(see opposite drawings) 

• Transmission of operating 

power from outside into 

the gas-filled switchgear 

vessel by means of a metal 

bellows 

• Gas-tight 


HA35-2520 eps 

HA35-2521 eps 

Transmission principle for operating mechanisms 


disconnector 

1 Gas-filled switchgear vessel 

2 Gas-tight welded metal bellows 

1 

2 

1 

2 



1 Gas-filled switchgear vessel 

2 Gas-tight welded metal bellows 


21


Components 

HV HRC fuse assembly 

Features 


– Switch-disconnector 

panel 

– Contactor panel 

– Metering panel 

• HV HRC fuse links 

according to DIN 43 625 

(main dimensions) with 

striker pin in ”medium” 

version acc. to IEC 60 282 / 


– As short-circuit protection 

before transformers in 

the switch-disconnector 

panel 


before motors in the 

contactor panel 


before voltage transformers 

in the metering 

panel 

– With selectivity 

(depending on correct 

selection) to upstream 

and downstream 

connected equipment 

– Single-pole insulated 

• Requirements according 

to IEC 60 420 and 

VDE 0670 Part 303 fulfilled 

by combination of 

HV HRC fuses with the 

three-position switchdisconnector 

• Climate-independent and 

maintenance-free, with 

fuse boxes made of cast 

resin 

• Fuse assembly connected 

to the three-position 

switch-disconnector via 

welded bushings and 

connecting bars 

• Location of fuse assembly 

below the switchgear 

vessel 

• Fuse can only be replaced 

if feeder is earthed 

Mode of operation 

In the event that an HV HRC 

fuse link has tripped, the 

switch is tripped via an articulation 

which is integrated 

into the cover of the fuse 

box (see figure). 

In the event that the fuse 

tripping fails, e.g. if the fuse 

has been inserted incorrectly, 

the fuse box is protected 

by thermal protection. The 

overpressure generated by 

overheating trips the switch 

via the diaphragm in the 

cover of the fuse box and via 

an articulation. This breaks 

the current before the fuse 

box incurs irreparable 

damage. 

The above thermal protection 

works independently of 

the type and design of the 

HV HRC fuse used. Like the 

fuse itself, it is maintenancefree 

and independent of any 

outside climatic effects. 

Furthermore, the Siemens 

HV HRC fuses release the 

striker pin independently of 

the temperature and trip the 

three-position switch-disconnector 

as early as in the fuse 

overload range. Impermissible 

heating of the fuse box 

can be avoided in this way. 

Replacement 

of HV HRC fuse links 

• Isolating and earthing of 

the transformer feeder 

• Subsequent manual replacement 

of the HV HRC 

fuse link after removing 

the cable compartment 

cover 

HA35-2522 eps 

HA35-2523 eps 

HV HRC fuse assembly 

Basic design 

1 2 

1 Bushing 

2 Switchgear vessel 

3 Sealing cover with seal 

4 Tripping pin for spring-operated/ 

stored-energy mechanism 

5 Fuse box 

6 HV HRC fuse link 

7 Striker pin of the HV HRC fuse link and 

articulation for tripping of the 

spring-operated/stored-energy mechanism 

Schematic sketches 

for fuse tripping 

3 4 

5 6 7 

Fuse link 

in service condition 

Fuse tripped 

by striker pin 

Fuse tripped by overpressure, 

e.g. if HV HRC fuse link 

has been inserted incorrectly 



Components 

Allocation of three-position switch-disconnector with HV HRC fuses · Transformer ratings 

The opposite table shows 

recommended HV HRC fuse 

links 3GD (electrical data valid 

for ambient temperatures of up 

to 40 °C) for the fuse protection 

of transformers. 

Recommendation 

The three-position switch-disconnector 

in the transformer 

feeder (transformer switch) 

was combined with Siemens 

HV HRC fuse links of type 3GD 

and tested in accordance with 

IEC 60 420. 

Higher transformer ratings on 

request. 

Standards 

HV HRC fuse links with striker 

pin ”medium” version according 

to 

• IEC 60 282 

• VDE 0670 Parts 4 and 402 

• DIN 43 625 

main dimensions 

Rated Transformer 

system Rating S N 

voltage 

kV 

kVA 

6 to 7.2 50 

75 

100 

125 

160 

200 

250 

315 

400 

500 

630 

10 to 12 50 

75 

100 

125 

160 

200 

250 

315 

400 

500 

630 

800 

1000 

13.8 50 

75 

100 

125 

160 

200 

250 

315 

400 

500 

630 

800 

1000 

1250 

15 to 17.5 50 

75 

100 

125 

160 

200 

250 

315 

400 

500 

630 

800 

1000 

1250 

24 50 

75 

100 

125 

160 

200 

250 

315 

400 

500 

630 

800 

1000 

1250 

1600 

2000 

Relative impedance 

voltage u k 

% 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

5to6 

5to6 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

5to6 

5to6 

5to6 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

5to6 

5to6 

5to6 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

4 

5to6 

5to6 

5to6 

5to6 

5to6 

Rated 

current I 1 

A 

4.8 

7.2 

9.6 

12.0 

15.4 

19.2 

24.0 

30.3 

38.4 

48.0 

61.0 

2.9 

4.3 

5.8 

7.2 

9.3 

11.5 

14.5 

18.3 

23.1 

29.0 

36.4 

46.2 

58.0 

2.1 

3.2 

4.2 

5.3 

6.7 

8.4 

10.5 

13.2 

16.8 

21.0 

26.4 

33.5 

41.9 

52.4 

1.9 

2.9 

3.9 

4.8 

6.2 

7.7 

9.7 

12.2 

15.5 

19.3 

24.3 

30.9 

38.5 

48.2 

1.5 

2.2 

2.9 

3.6 

4.7 

5.8 

7.3 

9.2 

11.6 

14.5 

18.2 

23.1 

29.0 

36.0 

46.5 

58.0 

Rated normal current of the HV HRC fuse 

Lowest 

value 

A 

16 

16 

20 

25 

32 

40 

50 

50 

63 

63 

100 

10 

10 

16 

16 

20 

25 

25 

32 

40 

50 

63 

63 

80 

6 

10 

10 

16 

16 

16 

20 

25 

32 

40 

50 

50 

63 

80 

6 

10 

10 

10 

16 

16 

20 

25 

32 

32 

40 

50 

63 

63 

6 

6 

10 

10 

10 

16 

16 

20 

20 

25 

32 

32 

40 

50 

63 

100 

Highest 

value 

A 

16 

20 

25 

32 

40 

50 

63 

80 

100 

100 

100 

10 

10 

16 

20 

25 

32 

40 

50 

63 

80 

100 

100 

100 

6 

10 

10 

16 

20 

25 

25 

32 

50 

50 

63 

63 

80 

100 

6 

10 

10 

10 

16 

25 

25 

32 

40 

50 

63 

50 

80 

100 

6 

6 

10 

10 

10 

16 

20 

25 

32 

40 

50 

40 

50 

63 

100 

100 



Components 

Vacuum contactor · Motor protection 

Features 

• According to IEC 60 470 and 

DIN EN 60 470 (Standards 

see page 34) 


welded switchgear vessel in 

conformity with the system 

• Climate-independent vacuum 

interrupter poles in the 

SF 6 -filled switchgear vessel 



IEC 60 694 and VDE 0670 

Part 1000 

• Individual secondary equipment 

• A metal bellows is used for 

gasketless separation of the 

SF 6 insulation and the operating 

mechanism – as already 

used with success for over 

100,000 vacuum interrupters 

• Magnet coil for operation 

located outside the switchgear 

vessel 

• 100,000 or 500,000 operating 

cycles at rated normal 

current 

Short-circuit and overload 

protection in connection with 

motors 

In circuits subjected to shortcircuit 

currents, HV HRC fuse 

links protect switching devices 

without short-circuit breaking 

capacity (e.g. vacuum contactors). 

The max. stress for HV HRC 

fuses arises during motor starting 

(starting currents, starting 

times and starting frequency). 

Fuses must not operate or be 

pre-damaged during motor 

starting. 

The opposite table shows the 

permissible motor starting currents 

according to the starting 

time and starting frequency 

of downstream connected HV 

motors with the associated 

HV HRC fuses. 



HA35-2525 eps 


2 

3 


(operating mechanism open) 




6 7 8 9 10 11 12 13 

Section through the vacuum contactor 

Motor protection table 

M 

3~ 

HV motors 

with starting times 

upto5s 

HV motors 


up to 15 s 

HV motors 


up to 30 s 

4 

5 

Number 

of starts 

per hour 

1 

4 Operating mechanism box with magnet coil 

5 Base plate (welded into the switchgear vessel) 

Maximum permissible motor starting current in A 

6 Fixed terminal 



9 Moving terminal 


SF 6 -insulated, with vacuum 

interrupter 


12 Operating mechanism box 

(see above figure) 

13 Operating kinematics 

at rated normal current of fuse 

40 A 63 A 100 A 125 A 160 A 250 A 

2 90 135 255 360 480 740 

4 80 120 235 330 440 675 

8 75 110 215 300 400 615 

16 65 100 190 270 360 550 

2 85 120 225 310 430 635 

4 75 110 205 285 400 580 

8 70 100 185 260 360 530 

16 60 90 165 235 325 475 

2 80 120 215 300 420 600 

4 70 105 190 265 370 530 

8 65 90 165 230 320 460 

16 55 80 145 200 280 400 


eps 

 


HA35-2517 HA35-2283d 

Busbars 

Features 

• Single-pole, plug-in design 

• Consisting of round-bar 

copper, insulated by means 

of silicone rubber 

• Busbar joints with cross and 

end adapters, insulated by 

means of silicone rubber 

• Field control by means of 

electrically conductive layers 

on the silicone-rubber insulation 

(both internally and externally) 

• Safe-to-touch by earthing 

the external layers with the 

switchgear vessel 

• Insensitive to pollution and 

condensation 

• Safe-to-touch as a result of 

use of metallic covers 

• Switchgear extension or 

panel replacement without 

SF 6 -gas work 

Possible fittings 

• Current transformers 

• Voltage transformers 

• Surge arresters 

• Cables with 

– Straight plug or 

– T-plug 

• Duresca bars 

(fully insulated) 

Legend 

1 Cap 

2 Busbar insulation made of 

silicone rubber 

3 Clamps 

4 Busbar (round-bar copper) 

5 End adapter 

6 Switchgear vessel 

7 Metal cover of busbars 

8 Cross adapter 

9 Earthing connection 

2 

 


Components 

7 

8 

9 

10 

7 

8 

9 

8 

9 

10 

Siemens HA 35.41 · 2003 25 

 

3 

4 

5 

6 

2 

3 

4 

5 

2 

3 

4 

5 

6 

Plug-in busbars (example) 

Busbars up to 1250 A, plug-in type, fully insulated 

(as front view of three panels, without low-voltage compartments) 

Section of busbar 1000 A or 1250 A (basic design) 

Section of tandem busbar 1600 A, 2000 A, 2300 A or 2500 A (basic design) 

1 

1


Components 

Current transformers 

Features 

• According to IEC 60 044-1 

and VDE 0414 Part 1 

• Designed as ring-core current 

transformers, single-pole 

• Free of dielectrically stressed 

cast-resin parts (due to 

design) 

• Insulation class E 

• Inductive type 

• Certifiable 


• Secondary connection by 

means of a terminal strip inside 

the panel 

Installation 

• Arranged outside the primary 



Current transformers 

Busbar current transformers 

Example 1250 A 

Front views: 

1 

1 Busbar current 

transformer 

2 Feeder current 

transformer 

at the panel connection 

3 Cable-type current 

transformer 

Side view: 

Mounting locations 

• At the busbar (1) 

• At the panel connection (2) 

• Around the cable (3) 

1 

1 

1 

Current transformer types 

• Busbar current transformer (1): 

– Inside diameter of 

transformer 

56 mm / £ 1250 A and 

56 x 300 mm / > 1250 A 

– Usable height 

max. 90 mm/>1250Aor 

max. 170 mm / £ 1250 A 

• Feeder current transformer (2): 


transformer 

106 mm / £ 1250 A and 

106 x 240 mm / > 1250 A 

– Max. usable height 214 mm 

• Cable-type current transformer 

(3): 


transformer 55 mm 

– Max. usable height 170 mm 

2 

3 

HA35-2526c eps 

2 

630 A, 1000 A 2000 A, 2300 A and 2500 A 

and 1250 A 

Current transformer fitting (basic design) 


Designation 

Operating voltage 

Rated short-duration 

power-frequency withstand 

voltage (winding test) 

Rated frequency 

Rated continuous thermal 

current 

Rated thermal 

short-time current, 

max. 3 s 

Rated current 

dynamic 

primary 

secondary 

Type 4MC 

max. 0.8 kV 

3kV 

50/60 Hz 

max. 1.2 x 

rated current 

(primary) 

max. 31.5 kA 

unlimited 

40 A to 

2500 A 

1Aand5A 

Designation 

2 

3 

Multiratio (secondary) 

Core data according to 

rated primary current: 

Measuring Rating 

core Class 

Overcurrent 

factor 

Protection Rating 

core Class 

Overcurrent 

factor 

Permissible ambient 

temperature 

Insulation class 

Type 4MC 

200 – 100 A to 

2500 – 1250 A 

max. 3 cores 

2.5 VA to 10 VA 

0.2 to 1 

FS 10 

2.5 VA to 30 VA 

5Por10P 

10 to 30 

max. 60 °C 

E 



Components 

Voltage transformers 

Features 

• According to IEC 60 044-2 and 


• Designed as single-pole voltage 

transformers, plug-in type 

• Metal-enclosed, safe-to-touch 

• Connection system with 

plug-in contact 

• Inductive type 

• Certifiable 


• Secondary connection by 

means of plugs inside the 

panel 

• Cast-resin insulated 

• Arranged outside the primary 


• Mounting locations: 

– At the busbar 

– At the panel connection 

Voltage transformer types 

• Busbar voltage transformer 

4MT2: 

– Pluggable in the cross adapters 

of the busbar £ 1250 A 

using additional adapters 


– No separate metering panel 

required 

– Suitable for 80 % of the 

rated short-duration powerfrequency 


at rated frequency 

– Repeat test at 80 % of the 

rated short-duration powerfrequency 


possible with mounted 

voltage transformer 

• Feeder voltage transformer 

4MT3 at the panel connection: 

– Switchable through an 

SF 6 -insulated disconnecting 

facility in the switchgear 

vessel 

– Switch positions: ”CLOSED” 

and ”Transformer bushing 

EARTHED” 

– Operation of the disconnecting 

facility from outside 

through a metal bellows 

welded in the switchgear 

vessel 

– Voltage testing of switchgear 

and cables possible with 

mounted and earthed voltage 

transformer 

1 


Voltage transformers 

Feeder voltage transformer 

Front view: 

2 2 


1 

Z 

3 

Side view: 

Voltage transformer fitting (basic design) 


Primary 

data 

Rated voltage 

For 

types 4MT3 and 4MT2 

3.3 to 22 kV 

Rated 10 kV 3.6/ 3 kV 

voltage 

20 kV 4.8/ 3 kV 

... at rated 

5.0/ 3 kV 

shortduration 

6.0/ 3 kV 

6.6/ 3 kV 

powerfrequency 

7.2/ 3 kV 

withstand 28 kV 10 / 3 kV 

voltage 11 / 3 kV 

38 kV 13.8/ 3 kV 

15 / 3 kV 

50 kV 17.5/ 3 kV 

20 / 3 kV 

22 / 3 kV 

Rated voltage 1.9 

factor 

U n /8 h 

Secondary 

data 


4 

Disconnecting facility 

for feeder voltage transformer 

(details Z) 

For 

type 4MT3 

Rated voltage 100/ 3 V, 

110/ 3 V 

Auxiliary winding 100/3 V 

110/3 V 

Thermal limit 8A 

current 

(measuring 

winding) 

Rated long-time 5A 

current, 

8h 

Rating 0.2 

at accuracy 0.5 

class 1 

1 Busbar voltage transformer 

2 Feeder voltage transformer 

at the panel connection 

3 Operating lever for 

disconnecting facility 

4 Panel connection 

CLOSED 

OPEN and EARTHED 

20, 25 and 30 VA 

50, 75 and 90 VA 

100, 150 VA 

For 

type 4MT2 

100/ 3 V, 

110/ 3 V 

100/3 V 

110/3 V 

8A 

5A 

25 VA 

45 VA 

75 VA 


27


Components 

Panel connection 

Features 

• Bushings with outside cone 

• With bolted contact (M16) as 

interface type ”C” according 

to EN 50 180 / EN 50 181 

• Cable connection height: 

702 mm (for switch-disconnector 

panels and contactor 

panels with HV HRC fuses: 

450 mm) 

• With cable bracket, 

e.g. type C40 according to 

DIN EN 50 024 

• Option: 

Access to the cable connection 

compartment only if the 

feeder has been isolated and 

earthed 

• For thermoplastic-insulated 

cables 

• For cable T-plugs or cable 

elbow plugs with bolted contact 

• For connection cross-sections 

up to 630 mm 2 (standard) 

• Cable routing downwards, 

cable connection from the 

front 

• For rated normal currents 

up to 2500 A 

• Cable plugs, cable sealing 

ends and cable clamps are 

not included in the scope of 

supply 

Surge arresters 

• Can be plugged into the cable 

T-plug 

• Surge arresters are recommended 

if, at the same time 

– The cable system is directly 

connected to the overhead 

line, 

– The protective range of the 

arrester at the terminal tower 

of the overhead line does not 

cover the switchgear 

Surge limiters 

• Can be plugged into the cable 

T-plug 

• Surge limiters are recommended 

if motors with 

starting currents < 600 A are 

connected 

HA35-2532 eps 

HA35-2533 eps 

HA35-2534 eps 


Cable connection 

compartment 

L1 L2 L3 

Panel width 600 mm 

L1 L2 L3 


L1 L2 L3 



702 (450*) 

702 (450*) 

702 

L1 L2 L3 

Connectable cables 

1 2 

Connection with 1 cable per phase 

3 

Connection with 2 cables per phase 


Legend 

1 Cable T-plug 

2 Cable elbow plug 

3 Screwed coupling 

insert 

1 1 1 

2 

1 1 1 

702 

3 3 


3 

3 3 

1 1 1 

2 

3 3 

1 1 1 

702 

* Cable connection height 

of 450 mm for switch-disconnector 

panels and contactor panels 

with HV HRC fuses 


L1 L2 L3 





Components 

Installation possibilities for cable connections and surge arresters 

Panel type 

Number Make 

of cables 

per panel 

and phase 

Core crosssection 

1 ) 

mm 2 

Insulation 

Cable 

elbow plugs 

bolted 

Cable 

T-plugs 

bolted 

Coupling 

inserts 

bolted 

Surge 

arresters 

(additionally) 

– Circuit-breaker 

panel 630 A, 

1000 A 

– Switch-disconnector 

panel 630 A 

– Ring-main panel 

630 A 

1 Euromold up to 300 EPDM – 1x(K)400 TB/G – 1x156SA-X or 

1x400PB-5/10-SA-X 

185 to 630 EPDM – 1x(K)440 TB/G – 1x156SA-X or 

1x400PB-5/10-SA-X 

up to 240 Silicone – 1xAGT 10(20), 

with metal housing 

up to 240 Silicone – 1xAGT L10(20), 

screened 

CP-AGT(L) 

CP-AGT(L) 

1x156SA-X or 

1x400PB-5/10-SA-X 

1x156SA-X or 

1x400PB-5/10-SA-X 

up to 300 EPDM 1x(K)400 LB/G – – – 

ABB 

up to 300/240 Silicone – 1xSET12/24 – 1xMUT 13/23 

Energiekabel 300 to 500 Silicone – 1xSEHDT13/23 – – 

nkt cables up to 300 Silicone – 1xCB 24-630 – 1xCSA 24-5 

Tyco Electronics up to 300 Silicone – 1xRSTI-56xx – – 

Raychem up to 300 Silicone – 1xRSTI-56xx RSTI-56CPxx 1xRSTI-56A-xx 

2 Euromold up to 300 EPDM – 2x(K)400 TB/G (K)400CP – 

185 to 630 EPDM – 2x(K)440 TB/G (K)440CP – 


CP-AGT(L) 1x400PB-5/10-SA-X 



CP-AGT(L) 1x400PB-5/10-SA-X 

screened 

up to 300 EPDM 1x(K)400 LB/G 1x(K)400 TB/G (K)400CP-LB – 

ABB 

up to 300/240 Silicone – 2xSET12/24 – – 

Energiekabel 300 to 500 Silicone – 2xSEHDT13/23 – – 

up to 300/240 Silicone – 2xSET12/24 – 1xMUT 13/23 

nkt cables up to 300 Silicone – 2xCB 24-630 CP 630C 1xCSA 24-5 

up to 300 Silicone – 1xCB 24-630 + 1xCC 24-630 – 1xCSA 24-5 

Tyco Electronics up to 300 Silicone – 2xRSTI56xx RSTI-56CP – 

Raychem up to 300 Silicone – 2xRSTI56xx RSTI-56CP 1xRSTI-56SA-xx 

– Circuit-breaker 1 or 2 Same possibility as above 

panel and 3 4 ) Euromold 185 to 630 EPDM – 3x(K)440 TB/G (K)440CP – 

disconnector panel, 

1250 A 2 ) 



Tyco Electronics 

Raychem 

up to 300 Silicone – 3xRSTI-56xx RSTI-56CP – 


panel and 


2000 A 

4 Euromold up to 300 EPDM – 4x(K)400 TB/G (K)400CP 1x156SA-X or 

1x400PB-5/10-SA-X 

185 to 630 EPDM – 4x(K)440 TB/G (K)440CP 1x156SA-X or 

1x400PB-5/10-SA-X 




screened 

CP-AGT(L) 

CP-AGT(L) 

1x156SA-X or 

1x400PB-5/10-SA-X 

1x156SA-X or 

1x400PB-5/10-SA-X 

up to 300 EPDM 2x(K)400 LB 2x(K)400 TB/G (K)400CP-LB – 

ABB 

300 to 500 Silicone – 4xSEHDT13/23 – – 

Energiekabel 



Tyco Electronics up to 300 Silicone – 4xRSTI-56xx RSTI-56CP – 

Raychem up to 300 Silicone – 4xRSTI-56xx RSTI-56CP RSTI-56SA-xx 

6 4 ) Euromold 185 to 630 EPDM – 6x(K)440 TB/G (K)440 CP – 

nkt cables up to 300 Silicone – 6xCB 24-630 CP 630C – 

up to 300 Silicone – 2xCB 24-630 + 4xCC 24-630 – – 


Raychem 

up to 300 Silicone – 6xRSTI-56xx RSTI-56CP – 

Up to 15 kV: 


panel and 


2300 A, 2500 A 3 ) 

6 4 ) Euromold up to 300 EPDM – 6x(K)400 TB/G27 (K)440 CP – 

1) Observe the actual current carrying 

capacity and short-circuit current carrying 

capacity of the cables and sealing ends 

2) With an actual current carrying 

capacity of > 1100 A at 40 °C, 

provide silver-plated cable lugs 

3) With a current carrying 

capacity of ³ 2300 A, provide 

silver-plated cable lugs 

4) Cable compartment cover 

20 mm deeper than 

standard 


29


Components 

Panel connection (cable sealing ends available on the market) 

Cable type Cable sealing end (further types on request) Comment 

Make Type Design Cross-section 

T/W 1 ) mm 2 

Thermoplastic-insulated cables 12 kV according to IEC 60 502-2 and VDE 0276 Part 620 

1-core cable, 

Euromold 400 TB/G T 25–300 EPDM (conductive) 

PE and XLPE-insulated 

400 LB/G W 25–300 EPDM (conductive) 

N2YSY (Cu) and 

440 TB/G T 185–630 EPDM (conductive) 

N2XSY (Cu) 

AGT 10 T 95–240 Silicone with metal housing 

or 

AGTL 10 T 95–240 Silicone (conductive) 

NA2YSY (AI) and 

nkt cables CB 24-630 T 25–300 Silicone (conductive), option: with metal housing 

NA2XSY (AI) 

ABB Energiekabel SET 12 T 70–300 Silicone (conductive), option: with metal housing 

SEHDT 13 T 400–500 Silicone (conductive), option: with metal housing 


Raychem 

RSTI 56.. T 25–300 Silicone (conductive), with capacitive measuring point 

Thermoplastic-insulated cables 15/17.5/24 kV according to IEC 60 502-2 and VDE 0276 Part 620 

1-core cable, 

Euromold K400 TB/G T 25–300 EPDM (conductive) 

PE and XLPE-insulated 

K400 LB/G W 25–300 EPDM (conductive) 

N2YSY (Cu) and 

K440 TB/G T 185–630 EPDM (conductive) 

N2XSY (Cu) 

AGT 20 T 25–240 Silicone with metal housing, multi-range design 

or 

AGTL 20 T 25–240 Silicone (conductive) 

NA2YSY (AI) and nkt cables CB 24-630 T 25–300 Silicone (conductive), option: with metal housing 

NA2XSY (AI) 

ABB Energiekabel SET 24 T 35–240 Silicone (conductive), option: with metal housing 

SEHDT 23 T 300–500 Silicone (conductive), option: with metal housing 

Tyco 

Electronics 

Raychem 

for single-core 

cables 

RSTI 56.. T 25–300 Silicone (conductive), with capacitive measuring point 

1) T = Cable T-plug, W = Cable elbow plug 

2) VDE 0278, IEC 60071, BS 7215, ANSI / IEEE 386, CENELEC HD 629.1 S1 







Components 

Indicating and measuring equipment 

Voltage detection systems 

• To verify safe isolation from supply 

• Detection systems (option): 

– LRM system with plug-in indicator 

– HR system with plug-in indicator 

– LRM system with CAPDIS 

– LRM system with CAPDIS-S1 

– LRM system with CAPDIS-S2 

LRM and HR systems 

• With voltage indicator according to 

IEC 61 243-5 and VDE 0682 Part 415 

• Verification of safe isolation from 

supply phase by phase by insertion in 

each socket pair 

• Indicator for continuous operation 

• Safe-to-touch 

• Routine-tested 

• Measuring system and voltage indicator 

can be tested 

• Voltage indicator flashes if high voltage 

is present 

CAPDIS 

• Voltage detection system according to 

VDE 0682 Part 415 


• Three-phase display 

• Reliable indication of 

– Voltage state of switchgear 

– Isolation from supply by active zero 

indication 

– Error 

• With integrated signalling relay for 

– Voltage present 

– Voltage not present 

– Error 

• Self-testing, thus repeated testing, as demanded 

in the standards, is not required 

• Additional test sockets for phase comparison 

with an LRM phase comparison 

test unit 

CAPDIS-S1 and -S2 

Same design as CAPDIS voltage detection 

system, but: 

• Without active zero indication and 

without signalling relay 

• Auxiliary voltage not required 

• Option: With remote indication of the 

voltage state (auxiliary voltage required 

for CAPDIS-S2) 

Verification of correct terminal-phase 

connections 

• Verification of correct terminal-phase 

connections possible by means of a 

phase comparison test unit 

(can be ordered separately) 

• Safe-to-touch handling of the phase 

comparison test unit by inserting it into 

the capacitive taps (socket pairs) of the 

switchgear 

HA35-2537 eps 

R-HA35-067.eps 

Voltage indicators and detection systems 

Voltage indicator 

pluggable per phase at the panel front 

1 2 3 

Voltage detection system CAPDIS 

1 Signalling relay (accessible from the rear) 

2 LCD 

3 Test sockets 

Voltage detection system 

CAPDIS-S1 

Voltage indication principle 

L1 

L2 

L3 

–C1 

U LE –C2 U2 

plugged-in 

LRM or HR 

system 

Voltage indication 

with capacitive voltage divider (principle) 

mounted 

CAPDIS 

–C 1 Capacity integrated into bushing 

–C 2 Capacity of the connection leads and 

of the voltage indicator to earth 

U LE = U N / 3 during rated operation 

in the three-phase system 

U 2 = U A = Voltage at the capacitive interface 

of the switchgear or at the voltage indicator 

Phase comparison test units 

Phase comparison test unit 

Make: Pfisterer, type EPV 

(or other makes) 

Phase comparison test unit 

Make: Horstmann, type ORION 3.0 

as combined test unit for 

– Phase comparison 

– Interface testing at switchgear 

– Voltage detection for HR and 

LRM systems 

or other makes 


31

R-HA35-112a eps 



Components 


Ready-for-service indicator 

Features 

• Self-monitoring; easy to read 

• Independent of temperature 

and pressure variations 

• Independent of site altitude 

• Only responds to changes in 

gas density 

• Option: Alarm switch ”1 NO 

contact” for remote electrical 

indication 

1 

Gas monitoring 

Low-voltage compartment 

Mode of operation 

For the ready-for-service indicator, 

a gas-tight measurement 

box is installed inside the 

switchgear vessel. 

A coupling magnet, which is 

fitted to the bottom end of the 

measurement box, transmits its 

position to an outside armature 

through the non-magnetizable 

stainless steel switchgear 

vessel. This armature moves 

the ready-for-service indicator 

of the switchgear. 

While changes in the gas density 

during the loss of gas, which 

are decisive for the insulating 

capacity, are displayed, temperature-dependent 

changes in 

the gas pressure are not. The 

gas in the measurement box 

has the same temperature as 

that in the switchgear. 

The temperature effect is compensated 

via the same pressure 

change in both gas volumes. 

Low-voltage compartment 

• Accommodates equipment 

for protection, control, 

measuring and metering 

• Separated from the highvoltage 

part, safe-to-touch 

• Low-voltage compartment 

can be removed, bus wires 

and control cables are 

plugged in 

• Option: High low-voltage 

compartment (1160 mm 

instead of 761 mm) possible 

HA35-2538 eps 

Control board (detail) 

with red/green ready-for-service 

indicator 

Principle of operation 

of gas monitoring 

with ready-for-service indicator 

1 Ready-for-service indicator 

2 Measurement box 

3 Magnetic coupling 

4 Red indication: 

not ready for service 

5 Green indication: 

ready for service 

2 

3 

Stainless-steel vessel 

filled with SF 6 -gas, 

gauge pressure 

50 kPa at 20 °C 

4 

5 

Ready-forservice 

indicator 

Low-voltage compartment with 

multifunction protection relay SIPROTEC 4 7SJ61 

(example) 

Description 

of the SIPROTEC 4 multifunction protection relays, 

see page 33. 



Components 


The low-voltage compartment 

can accommodate all 

customary protection, control, 

measuring and monitoring 

equipment available 

on the market. 

Examples: 

Multifunction protection 

relay SIPROTEC 4 

7SJ600/7SJ602 

• User-friendly operating 

program DIGSI 4 for configuration 

and analysis 

• Communications and bus 

capability 

• Functions: control, 

protection, indicating, 

communications and 

measuring 

• LCD (2 text lines) and keyboard 

for local operation, 

configuration and display 

• Four user-programmable 

LEDs for displaying any 

desired data 

• Operation and fault indication 

memory 

• Fault recording 

• Circuit-breaker control 


relay SIPROTEC 4 

7SJ61/7SJ62 

• For stand-alone or master 

operation 


capability 




measuring 

• LCD (4 text lines) for process 

and equipment data, 

in the form of a feeder 

mimic diagram and as 

text, e.g. for 

– Measuring and metering 

values 

– Information on status of 

switchgear and switching 

device 

– Protection data 

– General indications 

– Alarms 


function keys for frequently 

performed actions 

• Seven user-programmable 

LEDs for displaying 

any desired data 

• Keys for navigation in 

menus and for entering 

values 


relay SIPROTEC 4 7SJ63 

• For stand-alone or master 

operation 


capability 




measuring 

• LCD for process and 

equipment data, in the 

form of a feeder mimic 

diagram and as text, e.g. 

for 

– Measuring and metering 

values 

– Information on status of 

switchgear and switching 

device 

– Protection data 

– General indications 

– Alarms 


function keys for frequently 

performed actions 

• Fourteen user-programmable 

LEDs for displaying 

any desired data 

• Two key-operated 

switches to switch between 

”local and remote 

control” and ”interlocked 

and non-interlocked 

operation” 

• Keys for navigation in 

menus and for entering 

values 

• Integrated motor control 

by special relays with 

enhanced performance 

Legend 

1 LCD 

2 LEDs 

3 Key-operated switches 

4 Navigation keys 

5 Control keys 

6 Function keys 

7 LCD (text display) 

2 

7 

7 

2 

1 

2 

3 




Multifunction protection relays SIPROTEC 4 

4 

Multifunction protection relay 

SIPROTEC 4 7SJ600/7SJ602 

4 

6 

Multifunction protection relay 

SIPROTEC 4 7SJ61/7SJ62 

4 

5 

6 

Multifunction 

protection relay 

SIPROTEC 4 7SJ63 



Standards 

Standards, specifications, guidelines 

Standards 

The NXPLUS C switchgear 

complies with the relevant 

standards and specifications 

applicable at the time of type 

tests. 

In accordance with the harmonization 

agreement reached by 

the EU countries, their national 

specifications conform to the 

IEC standard. 

* In future all standards for switching 

devices and switchgear will be 

summarized in IEC 62 271 

** Withdrawn standard 

3 ) IEC 60 129 ** IEC 62 271-102 IEC 62 271-102 VDE 0670 Part 2 VDE 0671-102 EN 60 129 

4 ) IEC 60 265-1 * IEC 62 265-1 * IEC 62 271-103 VDE 0670 Part 301 VDE 0671-103 EN 60 265-1 

5 ) IEC 60 420 ** IEC 62 271-105 IEC 62 271-105 VDE 0670 Part 303 VDE 0671-105 EN 60 420 

Overview of standards 

IEC standard VDE standard EN standard 

up to now current in future current in future current 

Switchgear 

1 ) IEC 60 694 * IEC 60 694 * IEC 62 271-1 VDE 0670 Part 1000 VDE 0671-001 EN 60 694 

IEC 60 298 * IEC 60 298 * IEC 62 271-200 VDE 0670 Part 6 VDE 0671-200 EN 60 298 

Devices 2 ) IEC 60 056 ** IEC 62 271-100 IEC 62 271-100 VDE 0670 P. 101 to 106 VDE 0671-100 EN 60 056 

6 ) IEC 61 243-5 IEC 61 243-5 IEC 61 243-5 VDE 0682 Part 415 VDE 0682 Part 415 EN 61 243-5 

Degr.of prot. IEC 60 529 IEC 60 529 IEC 60 529 VDE 0470 Part 1 VDE 0470 Part 1 EN 60 529 

Insulation IEC 60 071 IEC 60 071 IEC 60 071 VDE 0111 VDE 0111 EN 60 071 

Transformers 

7 ) IEC 60 044-1 IEC 60 044-1 IEC 60 044-1 VDE 0414 Part 1 VDE 0414 Part 1 EN 60 044-1 

8 ) IEC 60 044-2 IEC 60 044-2 IEC 60 044-2 VDE 0414 Part 2 VDE 0414 Part 2 EN 60 7 044-2 

1) NXPLUS C switchgear 

2) Circuit-breaker 

3) Disconnector and earthing switch 

4) Switch-disconnector 

5) Switch-disconnector/fuse 

combination 

6) Voltage detection systems 

7) Current transformers 

8) Voltage transformers 

Insulating capacity 

• The insulating capacity is verified 

by testing the switchgear 

with rated values according 

to IEC 60 694 and VDE 0670 

Part 1000 (see table) 

• The rated values are referred 

to sea level and to normal 

atmospheric conditions 

(1013 hPa, 20 °C, 11 g/m 3 

water content in accordance 

with IEC 60 071 and 

VDE 0111) 

The gas insulation at a gauge 

pressure of 50 kPa permits 

switchgear installation at any 

desired altitude above sea level, 

without the insulating capacity 

being adversely affected. This 

also applies to the cable connection 

when cable plugs are used. 

A decrease (reduction) of the insulating 

capacity with increasing 

site altitude must only be considered 

for panels with HV HRC 

fuses. 

This reduction (r correction 

factor a = 0.9, see opposite diagram) 

is permitted up to a site 

altitude of 1000 m according to 

IEC and VDE. 

For site altitudes above 1000 m, 

the standards do not provide 

any guidelines for calculating 

insulation, but leave this to the 

scope of special arrangements. 


Table - Insulating capacity 

Rated voltage (r.m.s. value) kV 7.2 12 15 17.5 24 

Rated short-duration power-frequency withstand voltage (r.m.s. value) 

– Across isolating distances kV 23 32 39 45 60 

– Between phases and to earth kV 20 28 36 38 50 

Rated lightning impulse withstand voltage (peak value) 

– Across isolating distances kV 70 85 105 110 145 

– Between phases and to earth kV 60 75 95 95 125 

Correction factor a for panels with HV HRC fuses 

For site altitudes 

above 1000 m, 

the adjacent correction 

factor a is 

recommended, 

depending on the 

actual site altitude 

above sea level. 

Correction factor a 

1 

0,9 

0,8 

0,7 

0,6 

0,1 

5000 

0 

0 1000 2000 3000 4000 

Rated lightning impulse 

95 kV 

withstand voltage to be selected 1.1 · 0.73 = 118 kV 

Site altitude in m above sea level 

Rated short-duration power-frequency withstand voltage to be selected 

Rated short-dur. power-fre. withstand volt. (IEC 60 694 / VDE 0670 Part 1000) 

W 

1.1 · a 

Rated lightning impulse withstand voltage to be selected 

Rated lightning impulse withstand volt. (IEC 60 694 / VDE 0670 Part 1000) 

W 

1.1 · a 

Example: 

Result: 

3000 m site altitude above sea level 

According to the above 

17.5 kV switchgear rated voltage 

table, switchgear for a 

95.0 kV rated lightning impulse withstand voltage rated voltage of 24 kV is 

to be selected. 


Type of service location 

NXPLUS C switchgear can be 

used as an indoor installation in 

accordance with IEC 61 936 and 

VDE 0101 

• Outside lockable electrical 

service locations at places 

which are not accessible to 

the public. Enclosures of 

switchgear can only be 

removed with tools 

• Inside lockable electrical 

service locations. A lockable 

electrical service location is a 

place outdoors or indoors that 

is reserved exclusively for 

housing electrical equipment 

and which is kept under lock 

and key. Access is restricted to 

authorized personnel and persons 

who have been properly 

instructed in electrical engineering. 

Untrained or unskilled 

persons may only enter 

under the supervision of authorized 

personnel or properly 

instructed persons 

Terms 

”Make-proof earthing switches” 

are earthing switches with 

short-circuit making capacity 

according to 

– IEC 62 271-102 and 

– VDE 0670 Part 2 / 

EN 60 129.


Standards 

Standards, specifications, guidelines 

Current carrying capacity 

• According to IEC 60 298, 

IEC 60 694 and VDE 0670 

Part 6 and Part 1000, the 

rated normal current refers to 

the following ambient temperatures: 

– Maximum of 

24-hour mean + 35 °C 

– Maximum + 40 °C 

• The current carrying capacity 

of the panels and busbars 

depends on the ambient temperature 

outside the enclosure. 

Tests for resistance to internal 

arc faults 

• Tests for verifying resistance to 

internal arc faults should establish 

proper protection for 

operating personnel 

• Tests for resistance to internal 

arc faults can be agreed 

between the owner and 

manufacturer in accordance 

with IEC 60 298 and 


• The tests must be performed 

in accordance with IEC 60 298 

and VDE 0670 Part 6 

• Definitions of criteria: 

– Criterion 1 

Correctly secured doors, 

covers etc. do not open 


Parts of the enclosed switchgear 

which may cause a 

hazard do not fly off 


No holes in the freely 

accessible external parts of 

the enclosure as the result of 

burning in or tearing open 


Vertically arranged indicators 

do not ignite 


Horizontally arranged 

indicators do not ignite 


The effectiveness of the earth 

connection must not be 

detrimentally influenced 

Resistance to internal 

arc faults 

Due to the single-pole enclosure 

of external components and 

the SF 6 -insulation of switching 

devices, the probability of faults 

in SF 6 -insulated switchgear is 

considerably lower than in 

former switchgear types, as 

• There are no effects due to 

external influences such as 

– Pollution layers 

– Moisture 

– Small animals and foreign 

bodies 

• Maloperation is practically 

excluded by logical arrangement 

of the operating 

mechanism elements 

• Short-circuit-proof feeder 

earthing by means of the 

circuit-breaker or the threeposition 


In the unlikely event of a fault 

within the switchgear vessel, 

the energy conversion in the 

case of an internal arc fault is 

minor thanks to the SF 6 -insulation, 

i.e. approximately only 1/3 

compared to air. The escaping 

gases are discharged upwards 

through a pressure relief duct 

(option). 

Aseismic capacity (optional) 

NXPLUS C switchgear can be 

upgraded for regions at risk 

from earthquakes. 

For upgrading, earthquake 

qualification testing has been 

carried out in accordance with 

the following standards: 

• IEC 68-3-3, 1993 

• IEC 68-2-6, 1995 

• IABG TA13-TM-002/98 

(guide) 

Within the range of the prevailing 

earthquake frequencies 

from 1 Hz to 35 Hz, the category 

1 required response spectrum 

to IABG TA13-TM-002/98 

covers the following response 

spectra: 

• Uniform Building 

Code zone 3 

• Seismic Requirements 

Spec. 9067; Department of 

Water & Power, Los Angeles 

• GTS – 1.013 ENDESA, Chile 

• VDE 0670 Part 111 

Climate and ambient 

conditions 

NXPLUS C switchgear is fully 

enclosed and insensitive to 

climatic conditions. 

• All medium-voltage devices 

(except HV HRC fuses) are installed 

in a gas-tight, welded 

stainless steel switchgear 

vessel which is filled with 

SF 6 -gas 

• Live parts outside the switchgear 

vessel are provided with 

single-pole enclosure 

• At no point can creepage currents 

flow from high-voltage 

potentials to earth 

• Operating mechanism parts 

which are functionally important 

are made of corrosionresistant 

materials 

• Bearings in operating mechanisms 

are designed as dry 

bearings and do not require 

lubrication 

Protection against solid 

foreign bodies, electric shock 

and water 

NXPLUS C switchgear complies 

according to 

IEC 60 694 VDE 0670 Part 1000, 

DIN EN 60 694 

IEC 60 298 VDE 0670 Part 6 

IEC 60 529 DIN EN 60 529 

with the following degrees of 

protection: 

Degree of 

protection 

IP 65 

IP 3XD 

Type of 

protection 

for parts of the 

primary circuit 

which are subjected 

to high-voltage 

for switchgear 

enclosure 

Notes 

If not stated otherwise on 

the individual pages of this 

catalog, we reserve the right 

to include modifications, 

especially regarding the 

stated values, dimensions 

and weights. 

Drawings are not binding. 

All product designations used 

are trademarks or product 

names of Siemens AG or other 

suppliers. 

If not stated otherwise, all 

dimensions in this catalog are 

given in mm. 

Responsible for 

Technical contents: 

Herbert Soens 

Siemens AG, Dept. PTD M2 S2 

Erlangen 

General editing: 

Gabriele Pollok 

Siemens AG, Dept. PTD CC T 

Erlangen 

Printed in Germany 

KGK 02.03 9.0 VO/- 32 En 100563 

6101/D6271 


Published by 

Siemens AG 

Power Transmission and Distribution 

Medium Voltage Division 

Postfach 32 20 

91050 Erlangen 

Germany 

www.siemens.com/medium-voltage-switchgear 

Order No.: E50001-K1435-A401-A6-7600

Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS ... - Siemens

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