Answer / sakeeb

VCB means Vacuum Circuit Breaker and it mainly used in High Voltage switch-gear(Up to 33 Kv).
ACB means Air Circuit Breaker and it mainly used in Low Voltage switch-gear.

Answer / sanjayjssate

VCB is used where system voltage is high as 11 kv , 33 kv but current value is low

while ACB is used where system voltage is low but current value is high , ACB comes upto current value of 2000 amps

Answer / narasimha

V.C.B stands for Vacuum Circuit Breaker

Answer / rvr

simply
VCB- vaccum circuit breaker,used up to 35kv,3000A
vaccum quench the arc,long life
ACB-air circuit breaker,660v,10000A
large size,less life and more maintenance compared to VCB.electronically or microprocessor controlled...

boththe above CB's use charging spring to open the breaker

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