Why use the VCB at High Transmission System ? Why can't use
ACB? Pls explain the ans.
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Answer Posted / s syed mohamed
Actually the thing is vacuum has high arc queching property
compare than air .becoz in VCB ,the die electric strength
is equal to 8 times of air . That y always vaccum used as in
HT breaker and air used as in LT in these breakers employ
with high resistance intruption principle.
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