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SF6-insulated ring main unit and SF6-insulated compact switchgear are used in medium voltage distribution networks. They offer a sealed stainless steel tank which contains all the live components and switching functions. The transformer is protected either by a switch fuse combination or a vacuum circuit breaker.
SF6-insulated ring main unit can be supplied as a 2, 3 or 4-way unit in standard configurations with additional equipment according to customer specification.
SF6-insulated compact switchgear has a unique flexibility due to its extendibility and the possible combination of fully modular and semi-modular configurations, with a maximum of 5 modules in one SF6-tank.
The units are delivered from the factory ready for installation. Routine tests are carried out on all units/ modules before dispatch. No special tools are required for installing the equipment.
ELECTRICAL DATA
Gas Insulated Switchgear |
C-module |
F-module |
V-module |
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|
Switch disconnector |
Earthing switch |
Switch-fuse combination |
Earthing switch |
Vacuum circuit-breaker |
Earthing switch |
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Rated voltage |
kV |
12/17,5/24 |
12/17,5/24 |
12/17,5/24 |
12/17,5/24 |
12/17,5/24 |
12/17,5/24 |
Power frequency withstand voltage |
kV |
28/38/50 |
28/38/50 |
28/38/50 |
28/38/50 |
28/38/50 |
28/38/50 |
Impulse withstand voltage |
kV |
95/95/125 |
95/95/125 |
95/95/125 |
95/95/125 |
95/95/125 |
95/95/125 |
Rated current |
A |
630/630/630 |
|
2001) |
|
200/200/200 |
|
Breaking capacities: |
|
|
|
|
|
|
|
--active load |
A |
630/630/630 |
|
|
|
|
|
--closed loop |
A |
670/670/670 |
|
|
|
|
|
--off load cable charging |
A |
141/141/141 |
|
|
|
|
|
--off load transformer |
A |
|
|
20/20/20 |
|
|
|
--earth fault |
A |
205/160/160 |
|
|
|
|
|
--earth fault cable charging |
A |
117/91/91 |
|
|
|
|
|
--short-circuit breaking current |
kA |
|
|
see 2) |
|
16/16/16 |
|
Making capacity |
kA |
52,5/40/40 |
52,5/40/40 |
see 2) |
12,5/12,5/12,5 |
40/40/40 |
40/40/40 |
Short time current 0,5 sec 3) |
kA |
|
|
|
|
16/16/16 |
|
Short time current 1 sec 4) |
kA |
|
|
|
5/5/5 |
16/16/16 |
|
Short time current 3 sec 5) |
kA |
21/16/16 |
21/16/16 |
|
|
|
16/16/16 |
Note: 1) Depending on the current rating of the fuse-link
2) Limited by high voltage fuse-links
3) Maximum rating for bushings Interface A (200 series plug-in)
4) Maximum rating for bushings Interface B (400 series plug-in)
5) Maximum rating for bushings Interface C (400 series bolted)
