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What is the Difference Between MCCB & ACB & VCB
Answer Posted / ebrahim.p.b
MCCB-moulded case circuit breaker
ACB-air-blast circuit breaker
VCB-vaccum circuit breaker
their functions are same.......
ACB-These breakers employ a high pressure airblast as an arc
quenching medium.The contacts are opened in a flow of
airblast established by the opening of blast valve.The air
balst cools the arc and sweeps away the arcing product to
the atmosphere.This increases the dielectric strength of the
medium between contacts and prevents from reestablishing the
arc.Consequently the arc is extinguishedand flow of current
is interrupted.
VCB-in such breakers vaccum is used as the arc quenching
medium. Since vaccum offers highest insulating strength,it
has far superior arc quenching properties than any other medium.
| Is This Answer Correct ? | 15 Yes | 2 No |
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