... one or multi-load circuits from one power to the other power, to protect power suppliednormally to load circuit. The device ... Capacity Actual Units Produced(Previous Year) Circuit breaker, Dual power, Contactor, Relay Circuit breaker 750,000 Pieces / Month, Contactor 19,800 ... Pieces / Month, Dual power 3,100 Pieces / Month, Relay 9,000 Pieces / Month Circuit breaker 7,300 ...