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. Specification: Model: AES-63 Brand Name: MORA Earth Leakage: Four Pole Casmo high quality 30mA, 63A 4 pole type b rccb earth leakage breaker Package Includes: 1 x  AES-4P Magnetic Earth Leakage Circuit Breaker