AW45 series intelligent circuit breaker (hereinafter referred to as breaker) is suitable for the circuit of AC 50Hz with rated voltage 400V, 690V and rated current up to 6300A. It is mainly used to distribute electric energy and protect circuit and power supply equipment from overload, under-voltage short-circuit, and single-phase earthing. With intelligent and selective protection Functions, the breaker can improve the reliability of power supply, and avoid unnecessary power failure. The breaker is applicable for power stations, factories, mines(for 690V) and modern high-building, especially for the distribution system of intelligent building. The breaker conforms to IEC60947-2. The whole series have past CCC certification and CE Certification.