Answer / saravanan.p

MCCB ( Molded Case Circuit Breaker) - This CB used to
isolate the fault circuit while fault current >63 Amps.
(<63 Amps, we use MCB [Miniature Circuit Breaker]).

RCCB (Residual Current Circuit Breaker) - This is an
electrical wiring device that disconnects a circuit
whenever it detects that the electric current is not
balanced between the energized conductor and the return
neutral conductor.

ELCCB (Earth Leakage Circuit Breaker) - It is a safety
device used in electrical installations with high earth
impedance to prevent shock.

Answer / parasu

All are circuit breakers
MCCB - Molded case circuit breaker.. its function is to
protect the equipmet from fault conditon with the guidline
of relays information.
RCCB/ELCB -Residual current circuit breaker / earth leakage
CB

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