Earth Leakage Relay Circuit Diagram

Current earth leakage current earth leakage circuit breaker current elcb.

Earth leakage relay circuit diagram.

For many years the voltage operated elcb and the differential current operated elcb were both referred to as elcbs because it was a simpler name to. An voltage elcbs were first introduced about sixty years ago and current elcb was first introduced about forty years ago. If any current leaks from any electrical installation there must be any insulation failure in the electrical circuit it must be properly detected and prevented otherwise there may be a high chance of electrical shock if anyone touches the installation an earth leakage circuit breaker does it efficiently. An elcb is a specific type of latching relay that has a structure s incoming mains power associated through its switching contacts so that the circuit breaker detaches the power in an unsafe condition the elcb notices fault currents of human or animal to the earth wire in the connection it guards.

If ample voltage seems across the elcb s sense coil it will turn off the power and remain. An earth leakage circuit breaker elcb is a safety device used in electrical installations with high earth impedance to prevent shock. It detects small stray voltages on the metal enclosures of electrical equipment and interrupts the circuit if a dangerous voltage is detected.