Answer / suni

SF6 Vaccum circuit Breaker is used for 400KV substation
and above

Answer / ashish patil

we used only SF6 circit braker not SF6 vaccume ckt braker.
some year ago Air blast circit braker was also used.

Answer / raju pal

befor we are using ABCB type out door circuit breker.
now we are using sf6 fild out door circuit breker, like
abb , areva, simens are manufactur.

Answer / pawan kumar

sf6 circuit breakers are used for 400 kv substations in the
world

Answer / veerender

Above 220kv SF6 CB are used..

Answer / balaprasadgunana

sf6 circuit Breaker only used

Answer / mahesh-lanco

In this regards,first of all let us know what type of 400KV
substation it was????is it 1.Air insulated Substation
or 2.GAs Insulated Substation.

In Gas Insulated Sub station SF6 is the insulation medium
and SF6 Circuit Breaker is used.

Answer / romal

sf6 & some where air blast ckt. breaker

Answer / mike.vikram

well i wnt be able to assure with this one but i guess there
are three: Air ckt breaker, MCCB's and vaccum CB'srarely used)

Answer / kumar ravikesh singh

Above 66KV SF6 circuit breaker is used and below 66KV ACB
is used.

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