Three-phase asynchronous motor should not the normal operation of the fault analysis steps Units 1 Y160L-4-15KW three-phase asynchronous motor, should not the normal operation of the steps at the time of failure analysis. 

   When a motor can not be normal operation, it is necessary to fix it, we must follow the steps must check,that is, in a systematic to do some tests, find out the root cause of failure.After these tests, repair personnel will be able to determine whether this motor is only required minor repairs, or some or all of windings required repairs. 

  Inspection steps:

 (1) to check the status of motor mechanical aspects, such as whether has the breakdown of cover, the shaft torsional bending, contact, such as whether or not to burn or break.

 (2) check the bearings, which will be up and down rocking shaft, if the axis was some loose bearings express damaged.And then rotate the rotor by hand to see whether the operation of a flexible rotor.If the axis of rotation is abnormal, that there may be a problem of bearing part,or because of the bending axis or because of the assembly caused by not doing a good job.At this time no matter what its source, when the electric motor connected to power, it could result in blown fuse.

（3）to check the internal electrical wiring to see if there is the rotor and the stator coil and contacts happen phenomenon. Such tests that pass testing.

（4） When the operation of a flexible rotor, the motor can be connected to power supply, put a few seconds to switch closure.If the motor has an internal problem, it is likely to fuse blown;

winding smoke; rotation slow; the issue of noise or motionless.This phenomenon has often express winding problem or have burned.When this happens, open the end caps need to carefully check the various parts of motor windings.If the windings burned serious, from the winding can be judged by appearance. 

   After these steps to check, basically where the part can be judged failures. And the part for further inspection, you can find out where the fault location, repair accordingly.