... OEM all made. Application: JYW1 (DW45) series air circuit breaker (hereinafter referred to as breaker) is suitable for ... power-supply equipment from overload, under-voltage, short-circuit and single-phase earthing with intelligentized and selective protection ... Air Circuit Breaker,Mini Circuit Breaker,Moulded Case Circuit Breakers,Leakage Breaker,A.C Contactors and Dual power Automatic Transfer Switch, ...