A.AC380V/50HzB.AC440V/60HzC.AC400V/50HzD.AC400V/60Hz
A.AC1.68kV/50HzB.AC1.65kV/50HzC.AC2.68kV/50HzD.AC1.68kV/60Hz
A.一致B.相反C.无要求D.有延迟