Why Not Start Three Phase Asynchronous Motor

Reasons for not starting of three-phase asynchronous motor are the following:

1, the power is not switched on;

2, fuse;

3, the stator or rotor winding circuit;

4, the stator winding ground fault;

5, the stator winding phase short circuit;

Error 

6, stator winding;

7, overload or mechanical transmission is jammed;

8, the rotor copper bar loosening;

No lubricating oil 

9, bearings, shaft due to thermal expansion, obstruct the rotary in bearings;

10, control equipment wiring error or damage;

11, the over current breaker too small

12, bearing damage. 

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