Answer / satya brata sahoo

MCCB- (Molded case ckt breaker)
It is a ckt breaker and trip device assembled in a mould case.It is meant for highier rated current and is commonly used in industial applications
ELCB- ( Earth leakage ckt breaker)
elcb is working based on earth leakage current

Answer / h s sandhu

Although the answer for MCCB and ELCB is all right but mcb stands for Miniature Ckt breaker and is used in domestic and industrial area with low fault level and with B,C and D curve application for Light/resistance,Inductive load and Non linear loads of PCs etc which causes lot of harmonics in the supply line. .The protec for MCCB is more and of higher level than MCB.RCB is similar to ELCB which checks the leakage current.

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