The CYM2 series plastic shell circuit breaker is one of the new types of circuit breakers developed using advanced international technology. Its rated insulation voltage is 750V, suitable for AC 50Hz/60Hz, rated working voltage of 690V and below, and rated working current of 12.5A-630A. It is used to distribute electrical energy and is used for infrequent closing and opening under normal conditions. It also provides protection in case of overload or undervoltage of the line and equipment. Circuit breakers with rated shell level current of 400A or below can also be used for infrequent starting, operation interruption, and protection in the event of motor overload, short circuit, or undervoltage of squirrel cage motors. The product complies with the IEC60947-2 standard.