CM1 series moulded case circuit breaker is a new type product ,developed and manufactured by Adopting international advanced technology.It is supplied with rated insulation voltage 800V and used for circuit of AC 50Hz, rated operation voltage AC 400V or below rated operation current up to 1600A for infrequent changing over and starting of the motors. Equipped with the protection devicesfor over-current,short circuit and under voltage,the product is capable of preventing damage of circuits and supply units. The product conforms to IEC60947-2 standard.