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