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Why VCB and SF6 breakers to be used in HT used by cant ACB
of higher rating to be used for 11kv and 33kv.
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Answer Posted / kuldeep mehla
Beacuse Dielectric strength of vacuum & SF6 gas is more as compared to ACB. Therefore, for maintaining dielectric strenght to quench the arc at the same voltage level the size of ACB will be more compared to VCB & SF6. Therefore, ACB used in low tension line mostly.
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