SION Vacuum Circuit Breaker

Precise form and function

Description

The newest vacuum circuit breaker generation of Siemens (called SION) was successfully introduced in January 2006. Since this time the SION VCB family has been developed as the global platform for all kinds of applications in medium voltage.

All newly developed air-insulated switchgear of Siemens are based on the SION platform. Around the world more than 100 panel builders (OEM) have chosen SION as VCB for their own AIS.

SION vacuum circuit-breakers control all switching duties in medium-voltage distribution systems and are suitable for installation in all customary, new, air-insulated medium-voltage switchgear types as well as for retrofitting existing switchgear.
They are applicable for operation of e.g. overhead lines, cables, transformers, capacitors and motors. The comprehensive installation accessories enable easy integration in the panel, and form – maximally equipped as a withdrawable module with earthing switch – almost the complete circuit-breaker compartment inside the switchgear.

SION vacuum circuit-breaker for fixed mounting
Our comprehensive circuit-breaker product range offers a wide selection for pole-center distances and widths across flats as well as various equipment options for voltage levels from 7.2 kV to 24 kV. Identical dimensions and connection dimensions across several voltage levels reduce planning costs and the diversity of panel versions. High reliability and availability are just as much a matter of course as 10,000 maintenance-free operating cycles (30,000 operating cycles as option).

The breakers high reliability and availability are just as much a matter of course as 10,000 maintenance-free operating cycles.

­SION vacuum circuit-breaker on withdrawable part
The withdrawable part, contact arms, contacts and bushings enable easy integration in all customary medium-voltage switchgear types.
The circuit-breaker mounted on a withdrawable part can be supplied both with and without contact arms and contacts.

The circuit breaker mounted on a draw-out element can be supplied both with and without contact arms and contacts.

Withdrawable module
The withdrawable module contains all components required for the circuit-breaker compartment of a switchgear panel. It consists of the circuit-breaker mounted on a withdrawable part, with contact arms, fitted in a cartridge with side and rear walls. The withdrawable module is equipped with bushings, fixed contacts, shutters and the shutter mechanism. The side and rear walls form the tested connection compartment.

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Withdrawable module with earthing switch
The withdrawable module is also available with earthing switch. It contains all components required for the circuit-breaker compartment of a switchgear panel. It consists of the circuit-breaker mounted on a withdrawable part, with contact arms, fitted in a cartridge with side and rear walls. The withdrawable module is equipped with bushings, fixed contacts, shutters and the shutter mechanism, as well as with a make-proof earthing switch. The side and rear walls form the tested connection compartment.

Technical Data

Standards

The circuit-breakers conform to the following standards:

  • IEC 62271-1

  • IEC 62271-100


All SION vacuum circuit breakers fulfil the endurance classes E2, M2 and C2 according to IEC 62271-100.

 
The withdrawable modules have been tested according to

  • IEC 62271-200, 62271-1 and 62271-102 regarding
    - Dielectric strength
    - Temoerature rise
    - Switching capacity

regarding dielectric strength, temperature rise and switching capacity.

Maintenance-free design
The circuit-breakers are maintenance-free:

  • Under normal ambient conditions according to IEC 62271-1

  • Up to 10.000 operating cycles,
    - no regreasing
    - no readjusting

The ratings are independent - within their tolerances - of the switching rate or standing times without switching.



The circuit breaker is available with different pole-centre distances, widths across flats and installation accessories.
Please configure these options in our catalog.

Rated operating sequence (depends on rating)

O - 3 min - CO-3 min - CO

O - 0.3 s - CO-3 min - CO

O - 0.3 s - CO - 15 s - CO

Text

Dimensions

The following video shows the flexibility of the SION circuit breaker. The different pole-center distances and widths across flats are listed in the table below. Please find detailed configurations in our catalog.
Animation Pole-center distances:

Pole-centre distance (mm)

Width across flats (mm)

150

205 / 275 / 310

160

205 / 275 / 310

210

205 / 275 / 310

275

310

­Sample 1 - SION standard circuit breaker

SION standard circuit breaker

Rated voltage

Pole-centre distance (mm)

c (mm)

d (mm)

f (mm)

7.2 - 17.5 kV

150

445

540/562

380/450

 

160

465

540/562

380/450

 

210

565

540/562

380/450

24 kV

210

570

739

469

 

275

700

739

469

Please note: Minor changes of dimensions are permitted.

Please find additional dimension drawings and specific dimension tables in our catalog.

Sample 2 - SION slide-in module

SION slide-in module

Rated voltage

Pole-center distance (mm)

c (mm)

e (mm)

g (mm)

7.2 - 17.5 kV

160

594

850/905

710/760

 

210

794

850/905

710/760

24 kV

210

794

1040.5

810

275

994

1040.5

810

Please note: Minor changes of dimensions are permitted.

Please find additional dimension drawings and specific dimension tables in our catalog.

Weight in kg (depends on rating)

Standard circuit breaker

49 - 160

Draw-out element only

15 - 25

Standard circuit breaker + Slide-in module

85 - 210


Retrofit

As switchgear assemblies get older, the risk of undesirable operating incidents - such as high maintenance costs, unexpected down-times, and greater fire risk - increases while the spare parts supply situation becomes more difficult. With the new retrofit solution, Siemens offers you a low-cost alternative that allows you to continue using your proven switchgear while profiting from the advantages of the latest generation of components.

­Your advantages

  • Considerable cost savings

  • Simple "plug & play" replacement

  • Very short interruption of operation

  • Your system becomes practically maintenance-free

Sample: 8B switchgear

SION retrofits for 8B switchgear are available for a large number of ratings

Ur (kV)

Ir (A)

ISC (kA)

BIL (kV)

≤ 12

1.250

25

75

≤ 17,5

2.500

31.5

95

≤ 24

2.000

25

125

Retrofit solution