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using an ohmmeter

Discussion in 'General Electronics Discussion' started by gjoo, Jun 8, 2013.

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  1. gjoo

    gjoo

    34
    1
    May 22, 2013
    In the book i was reading it said, "use an ohmmeter for testing for open and shorted (internally and externally) field coils." I dont understand what they mean by internally or externally.
     
  2. poor mystic

    poor mystic

    1,071
    33
    Apr 8, 2011
    :)
    "Internal" means that sometimes 2 or more internal turns of a coil (say a motor magnet coil or a transformer coil) can become fused together.
    An "external" short is one where the short circuit is in the wiring to and from the coil.
    Both kinds of short circuits cause faults.
     
  3. gjoo

    gjoo

    34
    1
    May 22, 2013
    How can you check with an ohmmeter if its an external fault?
     
  4. gjoo

    gjoo

    34
    1
    May 22, 2013
    I get it now, thankd
     
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