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What is the Difference Between MCCB & ACB & VCB
Answer Posted / a k shukla
MCCB( moulded case circuit breaker),VCB(vacuum circuit
breaker),ACB(air circuit breaker) all are of different
types of breaker with same
functioning. name given them according to arc quenching
medium used inside the breaker i.e. air,vacuum,oil,sf6 etc.
all of them are used to isolate the electrical circuit by
manually as well as automatically to trip at the time of
fault in line and thus save the
circuit from damage and isolate unhealthy part from
healthy one.
if the circuit is of low(voltage & current basically in
domestic wiring and for low rating machinery)rating we can go
ahead with MCCB or MCB.
but for high (voltage ¤t)rating circuit we go for
costlier Breaker that is
ACB(air circuit breaker)or VCB(vacuum circuit breaker),OCB
(oil circuit breaker),SF6 etc. because they are more
reliable
As on today a new trends came in practice and MCCBs are also
manufactured in low rating current previously MCCBs
manufactured not less than 63 Amps.
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