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robertjschu
Jan 9, 2011, 03:00 PM
Do I need a motor starter on a 3ph 1hp thermally protected motor?

sathe1963
Jan 10, 2011, 11:39 PM
Basically, the starter is a combination of switch, fuse, thermal overload relay and speciality of no volt coil built on for contactor. In the event of power failure while motor is running; no volt coil drops down thus making the contactor in off state. Thus, after resumption of power again; there is no inadvertent starting of motor takes place. Hence, starter is necessary for a motor.