Answer Posted / shantanu dash

Miniature Circuit Breaker (MCB)has less short circuit with
stand current than MCCB( Moulded Case circuit breaker) or
MPCB( Motor protection Circuit Breaker).

Exp. MCB has short circuit withstand capacity of max. upto
10 KA. But MCCB/MPCB has fault withstand capacity from 25
KA to 50 KA or more.

Miniature circuit breaker comes in single pole/ two
pole/three pole/Four pole versions. but MCCB comes in
three/four pole version and MPCB comes in only three pole
version.

MCB Normally used in the lighting circuit. But MCCB is used
for feeder as well as motor protection having
Overload/short circuit/ earthfault protection in conjuction
with an additional over load relay. MPCB is only used for
Motor Protection.

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