SHIM1 series moulded case circuit breaker (abbr.breaker), is new type breaker designed by our company, adopting intemational latest manufacturing technology. Its rated insulation voltage is 800V, the breaker is operating in the distribution line of AC 50Hz(60Hz), rated working voltage 690V and below(DC 250V and below), rated working current up from 10A to 2000A, to non-frequently transfer the line or start the motor. The breaker has the protection functions of overloading, short circuit, and under-voltage, able to protect the line and equipment from being damaged.