SZM1（CM1）Series Plastic Moulded Case Breaker is one of new generation circuit breaker researched by our company adopting international advanced technology the circuit breaker is mainly used in the system of 50HZ,rated working current up to 800A to non frequently inverse or run the motor The circuit breaker has the protection of overloading ,short circuit under voltage to prevent from damage to devices Applicable standard GB14048.2 and IEC60947.2