... SwitchgearSpecification ItemUnitDataRated voltagekv3,6, 7.2, 12Rated frequencyhz50Rated current of circuit breakerA630, 1250, 1600, 2000, 2500, 3150, 4000Rated ... circuit capacity of current transformer is considered separately. 2. Details of the parameters of ZN 63A-12 as per reference ... by our company or the imported VD4 series vacuum circuit breaker, and also has wide applicability, high reliability ...