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    robertjschu's Avatar
    robertjschu Posts: 0, Reputation: 1
    New Member
    		  
    #1

    Jan 9, 2011, 03:00 PM
    Thermally protected motors
    Do I need a motor starter on a 3ph 1hp thermally protected motor?
    sathe1963's Avatar
    sathe1963 Posts: 97, Reputation: 4
    Junior Member
    		  
    #2

    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.
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