Motorized drive for electric stepping switch has additional cam switches operated by cam disc in control drive train for switching rotation direction of electric motor in load drive train

摘要

The motorized drive has a load drive train with an electric motor acting directly on the stepping switch and a control drive train with a cam disc having control cams for operation of a mechanical cam switch for a stepping switch relay and for operation of additional cam switches (S1,S2) for switching the rotation direction of the electric motor. When only one of the additional cam switches is closed the motor protection switch is used for bringing the motor to a standstill.