Unitised substation comprise of the following main components:
- Vacuum circuit breaker panel
in outdoor enclosure up to 11 KV. 1250 A complete with CT.PT.
Relay & Instrument Chamber. The outdoor circuit breaker panel
is directly coupled to HT - Flange of the transformer with Copper
Bush Bars. The incoming of the HT panel is provided either with
plug socket or Cable Box. Alternatively a Load Break Switch or
Ring Main Unit can also be coupled with the HT bushing of the
transformer.
- Outdoor transformers
are manufactured up to 1600KVA, 11KV, -6.6 KV -3.3 KV /415 KV DY
11 ONAN with Off Load Tap Changing switch and standard fittings as
per I.S. Incoming HT panel and LT Flange to outgoing LT Panel. The
Transformers can be either oil-immersed type or Dry Type with
nomex insulation.With Dry Type transformers the total unit can be
housed in single outdoor type enclosures in place of three
separate Enclosures.
- LT Panel is outdoor type
comprising of one or more air circuit breaker or MCCB either in
single execution or more air circuit breaker or MCCB either in
single execution or board formation, suitable foe a system voltage
of 3 Phase 415 Incoming feeder to LT panel will be directly
coupled with the LT flange of the transformers. The outgoing
feeder will have either Cable Box or plug & socket arrangement
for feeding power to LT equipment.
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Control & Relay
Panel
LT Panel
