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On a good single phase compressor motor, which winding terminals have the highest resistance?

1 Answer

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Final answer:

In a good single phase compressor motor, the armature winding terminals have the highest resistance.

Step-by-step explanation:

In a good single phase compressor motor, the winding terminals with the highest resistance are the armature winding terminals.

The lowest resistance will be found between the run(R) to common(C). The resistance between start(S) to common(C) is typically three-to-five times higher than run to common winding. Finally, the resistance between run and start should be the sum of S to C and R to C.

The continuity between these terminals should be under 30. Purchase a new compressor motor if your ohm readings are high. If your ohm readings are above 30, it means that your compressor motor is likely faulty and you'll need to get it replaced.

The reading should be between 0.3 to 2 ohms. If it is 0, there is a short. If it is over 2 ohms or infinite, there is an open. You can also dry the connector and retest to possibly get more accurate results.

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