In the protection distribution circuit with AC 50Hz/60Hz, rated working voltage up to 380V, rated current up to 63A and rated short-circuit breaking capacity up to 6000A, this product is mainly used for infrequent connection, breaking and conversion of the circuit. It has overload and short circuit protection functions, as well as strong auxiliary function modules, such as the auxiliary contact, indicating contact with alarm, shunt release, undervoltage release, remote tripping control, etc.