dielectric strength of vacuum is greater than SF6 but for 132Kv uses sf6 break

dielectric strength of vacuum is greater than SF6 but for
132Kv uses sf6 breaker & for 33kV uses vaccum breaker why such
a contradiction?

Question Posted / vishal madhukar dilpak

2 Answers
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MSETCL Maharashtra State Electricity Transmission Co Ltd, I also Faced
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dielectric strength of vacuum is greater than SF6 but for 132Kv uses sf6 breaker & for 33kV us..

Answer / abhi

i think the arc quenching in sf6 is better than vacuum. so for 33kv vacuum is usedc whereas for 132kv sf6 is used...

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dielectric strength of vacuum is greater than SF6 but for 132Kv uses sf6 breaker & for 33kV us..

Answer / sathyamoorthy r

my idea 132kv vacum circuit breaker ,vacum create is most costly & difficult compare sf6 so usely sf6 and low kv use vacum . another difficult arc quencing medium is high for sf6

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