SERIES: NF-C/S/H , 3-POLE

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. Once widely used, more recent
installations instead use residual current circuit breakers which instead detect leakage current directly.