Electric Motor Testing Procedure

A c electric motor troubleshooting guide test procedures in this article we provide a diagnostic guide to determine and repair problems with electric motors.

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

The windings are marked with tags u 1 and u 2 v 1 and v 2 w 1 and w 2. 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. Deviations from rated fla could signify problems with the motor under test. The bearings allow the shaft or rotor assembly to turn freely and smoothly in the frame.

And press a test probe to this spot and the other test probe to each of the motor leads one at a time. Loss of insulation resistance of an electric motor is one of the first signs of motor failure. 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. Testing electric motors doesn t have to be a mystery.

Ideally the meter should barely move off the highest resistance indication. Electric motors have had a reputation for being a mix of science and magic. 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. 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.

In the running configuration the windings are joined with metal jumpers. This article series gives electric motor start run capacitor and hard. 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. In order to properly test the motor you must remove.

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. Many electric motor failures are caused by bearing failures. The electrician or maintenance person must have this skill to determine the electrical motor condition defected or cannot use anymore it can save.