Electric Motor Testing Procedure

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.

Electric motor testing procedure.

The bearings allow the shaft or rotor assembly to turn freely and smoothly in the frame. Each motor has 3 separate windings. Many electric motor failures are caused by bearing failures. Testing electric motors doesn t have to be a mystery.

The electrician or maintenance person must have this skill to determine the electrical motor condition defected or cannot use anymore it can save. This article gives a description of electric motor capacitor test procedures to determine if a capcitor is damaged or working normally test procedures to measure the capactor s capacitance or microfarads mfd or uf to determine if it is working within its rated capacitance range. Knowledge of the basics together with powerful new test equipment vastly simplifies the job. The page top photo was taken of of an oil burner electric motor not an air conditioning blower fan motor or pump motor but you ll see that all of these electric motors look a lot alike.

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. Minimum test value of motor insulation resistance is 1 meg ohm 1 mω. 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. 3 phase motor testing procedure the patriot mill turn and turnado machines are equipped with 3 phase motors.

Loss of insulation resistance of an electric motor is one of the first signs of motor failure. The windings are marked with tags u 1 and u 2 v 1 and v 2 w 1 and w 2. Minimum test value for a good electric motor is at least 1mω 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 motor name plate fla. Ideally the meter should barely move off the highest resistance indication.

Electrical motor is the common used in industry all over the world it very important device to made production smoothly to ensure the electrical motor condition is good or not we must know how to testing it. Electric motors have had a reputation for being a mix of science and magic. So when a motor fails to operate it may not be obvious what the problem is. And press a test probe to this spot and the other test probe to each of the motor leads one at a time.

How to test an electric motor capacitor. In order to properly test the motor you must remove. Deviations from rated fla could signify problems with the motor under test. Check c to e s to e r to e.