... as contactors hereinafter) are mainly used for circuit of AC 50Hz (or 60Hz) with rated working voltage 660V. ... Under using category of AC-3, they can be used for circuit with ... are suitable for frequent start and control of AC motors. These contactors are modified on the basis ... to the table Working voltage (US) of contactor coil: AC 36V, 110V, 127V, 220V, and 380V Pick-up ...