Answer / m.babu

For 11KV and 33KV voltage levels vaccum circuit breakers
are to be used.
For 66KV voltage level SF6 breakers are to be used.

Answer / jyotirmaya patra

For 11KV Vaccum Circuit Breakers(VCB) are suitable to use.
Now-a-days SF6 (Sulphor Hexa Fluoride) breakers are
available but VCBs are economical than SF6 breakers.

For 33KV - both VCB & SF6 breakers can be used,but SF6
breakers are safer than VCBs. VCBs are more economical

For 66KV - SF6 breakers are the best to use

Answer / birinchi narayan boruah

For LT: 415 V
Use ACB (Air blast Circuit Breaker)
For 11KV and 33KV:
Use VCB (Vaccum Circuit Breaker) or SF6 CB (Sulphar Hexa Floride Circuit Breaker).
For 66KV, 132KV and 220KV:
use SF6 Circuit Breaker or Oil Circuit Breaker

Answer / nikhil panchal

Below 15kV AIR CB
22 to 66 kV VCB
115-230 kV SF6
UPTO 765kv ABCB

Answer / nur.asidik

below 36kV, it is better to use VCB, and above 36kV to use SF6

Answer / jegan.j

11kv - vcb (vaccume circuit breaker)
mccb(moulted case circuit breaker)
mcb(maniature circuit breaker)
acb(air circuit breaker)
33kv - sf6
66kv - sf6

Answer / fazil pasha

For 11KV Vaccum Circuit Breakers(VCB) are suitable to use.
Now-a-days SF6 (Sulphor Hexa Fluoride) breakers are
available but VCBs are economical than SF6 breakers.

For 33KV - both VCB & SF6 breakers can be used,but SF6
breakers are safer than VCBs. VCBs are more economical

For 66KV - SF6 breakers are the best to use

Answer / manoj

upto 11kv air break or oil break type.
between 11kv to 66kv mainly oil CB.
between 132kv to 275kv is shared by oil and gas blast CB.
between 400kv and above gas blast(SF6)type.

what shall be no load voltage of 132/33 kV transformer ? is it 33 kv of 34.5 kV

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