WHAT MCB AND MCCB

WHAT MCB AND MCCB

1)MCB stands for MINIATURE CIRCUIT BREAKER with rated current 
below 100 amperes whereas MCCB stands for MOULDED CASE 
CIRCUIT BREAKER with rated current from 10 amperes to 2000 
ampers.MCB has breaking capacity upto 10kA, MCCB has 
breaking capacity above 10kA.


2)mcb mean miniature circuit breaker and mccb mean moulded 
case circuit breaker .mcb is used for upto 16A and mccb 
used for above 16A .it means it is capable for higher 
currents


3)MCB is miniature circuit breaker which is thermal oprated 
and use for short circuit protection in small current 
rating circuit. MCCB is moulded case circuit breaker and is 
thermal operated for over load current and magnetic 
operation for instant trip in short circuit condition.
Under voltage and under frequency may be inbuilt. Normally 
it is used where normal current is more than 100A


4)MCB - MINIATURE CIRCUIT BREAKER with rated current 
below 100 amperes whereas MCCB - MOULDED CASE 
CIRCUIT BREAKER with rated current from 10 amperes to 2000 
ampers.

SSV