Rcd Breaker Meaning. Circuit breakers are a cost effective and efficient alternative to traditional circuit protection fuses. The mccb is an earth leakage breaker also known as a core balance or residual current device.
When current in the active phase of the breaker does not match the current in the neutral phase the breaker will de energise. So basically it will only break the circuit when there is a leakage current flowing to earth. The circuit breaker is set at the capacity of the wires in the circuit it protects.
Rcd means residual current device and mcb means multiple circuit breaker.
A circuit breaker breaks the circuit if the current demand gets too high. Literally the change in current in the neutral required to trip the breaker. Circuit breakers are safety devices which ensures the safety of equipment and personnel from electric shocks and damages. So basically it will only break the circuit when there is a leakage current flowing to earth.
