Moulded-Case Circuit Breaker

SM40L residual current MCCB

 SM40L series moulded-case circuit-breaker with residual current protection( for short hereafter) is one of the SM40 series products and a new one developed with the advanced abroad know-how on both design and manufacture .with a rated insulating voltage 800V, and suitable for the non-frequent conversion in the circuit of AC 50Hz, rated working voltage below 400V and rated working current up to 800A and the non-frequent starting of motors. it feature the overload, short-circuit and under-voltage protections to protect both lines and power equipments against damage and also against both electric impulse (I n<=30mA) and equipment leak, as well as prevent the fire danger caused by the fault-ground due to insulation damages of equipment.