Electric Motor Testing Procedure

How to check an electric motor.

Electric motor testing procedure.

See how to measure insulation resistance of electric motor running amps test with the motor running check the full load amps fla with a suitable meter or preferably a clamp on meter and compare with the name plate fla. For a three phase motor the isolation resistance can usually be measured between each motor winding or phase and between each motor stage and motor frame earth by an insulation tester or megger 4. Testing of a three phase electric. When a motor fails it is often difficult to see why it failed just by looking at it.

This might result in unexpected motor failures when critical services from such motors are required affecting availability of plants. Minimum test value of motor insulation resistance is 1 meg ohm 1 mω. A motor placed in storage may or may not work regardless of its physical appearance. Electric motors have had a reputation for being a mix of science and magic.

Actually voltage or current unbalance will produce too much heat thus damaging the motors. Testing electric motors doesn t have to be a mystery. Home technical articles testing and commissioning procedure for electric motors scope of motor testing it should be noted that the scope of motor testing depends upon the motor type and size this being indicated on the inspection forms. So when a motor fails to operate it may not be obvious what the problem is.

Knowledge of the basics together with powerful new test equipment vastly simplifies the job. Industries of today use three phase motors widely in high power applications.