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 / deepak kumar
because in acb time required to extinguish the arc is much
more as compare to sf6 & vcb,if we use acb at higher
voltage , very large amount of heat will produced during
abnormal condition( short ckt) that will damage the acb or
complete circuit
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