Difference between elcb and mcb pdf5/25/2023 ![]() An earth leakage circuit breaker may be an RCD, although an older type of voltage-operated earth leakage circuit breaker (ELCB) also exists. If the RCD device has additional overcurrent protection integrated in the same device, it is referred to as RCBO. Injury may still occur in some cases, for example if a human receives a brief shock before the electrical circuit is isolated, falls after receiving a shock, or if the person touches both conductors at the same time. ![]() It is to protect equipment and to reduce the risk of serious harm from an ongoing electric shock. A residual-current device ( RCD), residual-current circuit breaker ( RCCB) or ground fault circuit interrupter ( GFCI) is an electrical safety device that quickly breaks an electrical circuit with leakage current to ground.
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