How do you check a generator windings?

Using a multi-meter set to test resistance, connect the multi-meter to each end of the wire coil using the leads. The meter should give a resistance measurement that is within the manufacturers specifications. A reading outside of this spec will indicate a bad winding. Perform this test on both power windings.

When testing the windings in the stator which measurement should be used?

To test complete stator windings, the high voltage test supply must be rated in the 5 to 20 kVA range to energize the winding capacitance to rated line-to-ground or line-to-line voltage.

How do you test the winding resistance of a generator?

Motor winding resistance test uses the “Four-wire” (Kelvin) measurement method. It provides the best possible measurement results since it ensures that the resistance of the connecting current cables is not included in the measurement. The test current is passed through the windings using the high current cables.

How do you test a 3 phase winding?

Check the motor winding resistance or ohms reading using a multimeter or ohmmeter for phase to phase terminal ( U to V,V to W ,W to U ). The ohms reading for each winding must be the same (or nearly the same). Remember that the three phases have identical windings or nearly so!

How do you check motor winding short circuit?

You should test the windings for a “short to ground” in the circuit and open or shorts in the windings. To test your motor for short to ground, you’ll need to set the multimeter to ohms and disconnect the motor from its power source. Then inspect each wire and look for infinite readings.

How many ohms should a generator stator have?

You should read around 0.2 to 0.5 ohms. If you show an open circuit with the “Open” or infinity reading or have higher resistance, then the stator is bad and you must replace it. If these tests all produce positive results, then the stator itself is good.