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  • Users: xchcui
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  1. xchcui

    Testing compressor winding insulation with megger.

    Hello. I test an air conditioner's compressor 3.5HP with megger(500V) and i got a result,0.5MΩ. Good results should be above 50MΩ-100MΩ,while the result that i got is very low. The compressor is working very good and the current consumption is normal.So,i wonder if i did something wrong which...
  2. xchcui

    PSC motor behavior when changing run capacitor value.

    Hi. I was browsing and read alot of articles and forums around the web and i didn't find a full explanation about the behavior of the current and the voltage in the PSC motor. Here are two situations that i would like to understand(and please, correct me if i wrong about something). 1)if i...
  3. xchcui

    Why may megger test damage motor winding,while the output current is limited?

    Hi. When using megger,for example,to test 220vac motor winding with 1000vdc megger test, (I mentioned 1000v,instead the standard test of 500vdc on purpose,for the example). why can the megger test damage the motor winding if you apply too much voltage when testing the motor,while the current...

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