Motor Insulation Resistance Test

A if the insulation resistance of a new cleaned or repaired motor that has been stored for some time is less then 10 mω the reason might be that the windings are humid and.

Motor insulation resistance test.

Using insulation testing with an instrument such as the fluke 1555 10 kv insulation tester combined with fluke connect technology such leaks can be detected as insulation resistance slowly tapers over time a sign of normal and expected deterioration. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Set the voltage. The measurement of insulation resistance is carried out by means of a megohmmeter high resistance range ohmmeter this is how the test works.

Whether the dielectric is good or bad. 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. With a little record keeping and common sense however you can get a good picture of the insulation condition from values that are only relative. After the required connections are made you apply the test voltage for a period of one min.

1 insulation resistance ir this is the simplest of the tests. Basically there are three different tests that can be done using a megohmmeter. For a three phase motor insulation resistance is usually measured between each motor winding or phase and between each motor phase and motor frame earth using an insulation tester or megger. When performing insulation resistance testing you must maintain consistency.

Dc voltage of 500 or 1000 v is applied between the windings and the ground of the motor. Insulation resistance test insulation resistance failure of an electric motor is one of the first signs that the motor is about to fail. Because electrical insulation will exhibit dynamic behavior during the course of your test. Ground insulation test of a motor.

The insulation keeps the current flowing along the wire exactly as intended. Insulation resistance decreases in temperature or moisture. After 1 min you should read and record the resistance value.