An ELCB is a specialized type of latching relay that has a building's incoming mains power connected through its switching contacts so that the ELCB disconnects the power when earth leakage circuit supplier is detected. The ELCB detects fault currents from live to the Earth (ground) wire within the installation it protects. Branch lines for leakage circuit breaker, the operating current should be greater than the leakage current of 2.5 times the normal operation of the line, but also more than 4 times the maximum leakage current line electrical equipment leakage current
