ZKM1L residual current protection circuit breaker is suitable for AC 50Hz, rated working voltage of 400V, rated insulation voltage of 800V, rated working current up to 800A; used for infrequent switching in circuits and infrequent starting of motors; The rated residual operating current and maximum breaking time can be adjusted according to the actual situation; The working power supply sampling of the residual current protection circuit breaker in this series is three-phase. If any phase is missing, the residual current protection module of the circuit breaker can still work normally; Equipped with overload, short circuit, leakage and undervoltage protection functions; Equipped with leakage alarm output function; The entire series of circuit breakers has isolation function.