Indoor Vacuum Circuit Breaker
General Information
- Description
Cricuit-breakers must make and break all currents withing the scope of their ratings, from small inductive and capacitive load currents up to the short-circuit current, and this under all fault conditions in the power supply system such as earth faults, phase opposition and so on.
Further information you find in the booklet Vacuum Switching Technology and Components for Medium Voltage - Your guide on the right hand side.
Our Portfolio (6)
SION Vacuum Circuit-Breaker
- Description
- Technical Data
- Dimensions
- Retrofit
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 switchgears of Siemens are based on the SION platform. Around the world more than 100 panel builders (OEM) have choosen SION as VCB for there own AIS.
SION vacuum circuit-breakers control all standard 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, generators, capacitors, filter circuits, motors and reactors. The comprehensive installation accessories enable easy integration in the panel and form, maximally equipped as a slide-in module with earthing switch.
SION standard circuit-breaker
The SION product range offers a wide selection of breakers for voltage levels from 7,2 to 24 kV with various options. These options can be.
- Various pole-center distances and widths across flats
- Identical dimensions and connections across several voltage levels to reduce planning costs
The breakers high reliability and availability aur just as much a matter of course as 10.000 maintenance-free operating cycles.
SION circuit-breaker drawout-version
The SION circuit-breaker can be adjusted to your requirements by means of various equipment options. This switching device can be mounted equiped with
- drawout element
- mountable contact arms
- contacts and bushings
The circuit-breaker mounted on a drawout element can be supplied both with and without contact arms and contacts. Download Video
SION slide-in module
The slide-in module contains all components required for the circuit-breaker compartment of a switchgear panel. It consists of the circuit-breaker with:
- drawout element and contact arms
- cartridge with sid and rear walls
- bushings, fixed contacts, shutters and shutter mechanism
The side and rear walls form the tested connection compartment. Download Video
Standards for circuit-breaker
- EC 62271-1
- IEC 62271-100
All SION vacuum circuit-breakers fulfil the endurance classes E2, M2 and C2 according to IEC 62271-100.
The slide-in modules
have been tested according to
- IEC 62271-200
- IEC 62271-1
- IEC 62271-102
regarding dielectric strength, temperature rise and switching capacity
| Rated voltage (kV) | Interrupting current (kA) | Continuous current (A) | ||||
| 800 | 1250 | 2000 | 2500 | 3150 | ||
| 7.2 | 16 | ■ | ■ | |||
| 20 | ■ | ■ | ||||
| 25 | ■ | ■ | ■ | |||
| 31.5 | ■ | ■ | ■ | ■ | ||
| 40 | ■ | ■ | ■ | ■ | ||
| 12 | 16 | ■ | ■ | |||
| 20 | ■ | ■ | ||||
| 25 | ■ | ■ | ■ | ■ | ||
| 31.5 | ■ | ■ | ■ | ■ | ||
| 40 | ■ | ■ | ■ | ■ | ||
| 17.5 | 12.5 | ■ | ■ | |||
| 16 | ■ | ■ | ||||
| 25 | ■ | ■ | ■ | ■ | ||
| 31.5 | ■ | ■ | ■ | ■ | ||
| 40 | ■ | ■ | ■ | ■ | ||
| 24 | 12.5 | ■ | ■ | |||
| 16 | ■ | ■ | ■ | |||
| 20 | ■ | ■ | ■ | ■ | ||
| 25 | ■ | ■ | ■ | ■ | ||
The circuit-breaker is available with different pole-center distances, widths across flats and installation accessories. Video
Please configure these options in our catalog.
| O - 3min - CO-3min - CO |
| O - 0.3s - CO-3min - CO |
| O - 0.3 s - CO - 15 s - CO |
The following Video shows the flexibility of the SION circuit-breaker. The differet Pole-center distances and Widths across flats are listed in the table below. Please find detailed configurations in our catalogue.
| Pole-center distance (mm) | Width across flats (mm) |
| 150 | 205 / 275 / 310 |
| 160 | 205 / 275 / 310 |
| 210 | 205 / 275 / 310 |
| 275 | 205 / 275 / 310 |
Sample 1 - SION standard circuit breaker
| Rated voltage | Pole-center distance (mm) | c (mm) | d (mm) | f (mm) |
| 7,2 - 17,5 kV | 150 | 445 | 562,5 | 380 |
| 160 | 465 | 562,5 | 380 | |
| 210 | 565 | 562,5 | 380 | |
| 24 kV | 210 | 570 | 739 | 468 |
| 275 | 700 | 739 | 468 |
Please note: minor changes of dimensions are permitted
Please find additional dimension drawings and specific dimension tables in our catalogue.
Sample 2 - SION slide-in module
| Rated voltage | Pole-center distance(mm) | c (mm) | e (mm) | g (mm) |
| 7,2 - 17,5 kV | 160 | 594 | 905 | approx. 713 |
| 210 | 794 | 905 | approx. 713 | |
| 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 | 67 - 160 |
| drawout element only | 15 - 25 |
| standard circuit breaker + slide-in modul | 103 - 210 |
As switchgear assemblies get older, the risk of undesirable operating incidents - such as high maintenance costs, unexpected downtimes, 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
| 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 |
