The ABB E3H1600 R1600 PR121/P-LSIG WHR 3P is a modular circuit breaker offering advanced protection for motors and electrical circuits. The breaker is specifically engineered to handle high fault currents and to provide selective protection for critical equipment. The inclusion of LSIG protection (Long-time, Short-time, Instantaneous, and Ground fault) adds an additional layer of safety to the device by detecting and isolating leakage currents and ground faults.