LC1-D series AC contactor(simplified as contactor in the following)is suitable for using in the circuits up to the rated voltage 660V AC 50Hz or 60Hz, rated current 95A, for making and breaking and frequent starting, controlling the AC motor. Combined with the auxiliary contact group, air delayer, machine interlocking device etc, it is combined into the delay contactor, mechanical interlocking contactor, dtar-delta starter, with the thermal realay, it is combined into the electromagnetic starter.