how to test generator windings

Connect the probes to the ohmmeter and set the meter to a midrange setting. Remove all power from the motor and isolate the circuit. Use extreme caution when working with electricity. By creating an account you agree to the Hunker. Tag the circuit breaker to prevent accidental restoration of power. Most individuals do not own a megger, but probably do have an ohmmeter. Consult the motor schematic or a diagram of the motor's windings and use the meter to measure the resistance of the windings. Most repair shops will use a "megger" or a ground insulation tester. When a bad motor winding cannot be found by a physical inspection, many times an ohmmeter may show that there is a defective winding. Check winding insulation for cracks or brittleness. Write down each measurement and make comparisons when measurements are complete. Use the schematic and take readings of all of the windings. Most repair shops will use a "megger" or a ground insulation tester. Most individuals do not own a megger, but probably do have an ohmmeter. Touch the two leads together and make sure that the meter indicates continuity, or zero ohms. He attended the University of South Florida. Ensure all power has been removed from motor circuit and that the breaker has been tagged. He has been published in "Florida Sportsman" magazine. While the ohmmeter may not show potential failures, it can be used to determine if the windings are good or bad. Clean the windings and motor interior with shop air and inspect for any damage. Daniel Ray has been writing for over 15 years. Use the link listed below in the Resources section for a Website on how to use an ohmmeter. He holds an FAA airframe and powerplant license and FCC radiotelephone license, and is also a licensed private pilot. Open motor housing to access windings. While the ohmmeter may not show potential failures, it can be used to determine if the windings are good or bad. The megger will help to detect areas of deteriorating insulation where the windings may soon short. The meter should not show an "open" or a "short" when a winding leg is measured.

Each winding leg should have some small resistance reading. Hunker may earn compensation through affiliate links in this story. The megger will help to detect areas of deteriorating insulation where the windings may soon short.

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