... , for making, breaking, frequently starting & controlling the AC motor. Combined with the auxiliary contact block, timer delay & machine-interlocking device ... the delay contactor, mechanical interlocking contactor, star-delta starter. With the thermal relay, it is combined into the electromagnetic starter ... .557.78.512AC3 capacity of phase 3 squirrel-cage motor AC3(KW)220/230V2.2345.57.5380/400V45.57. ...