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Generator voltage clipping

  1. Jan 19, 2012 #1
    I have a 600v 3 phase generator that will not put out a stable voltage. When looking at the sine wave through a scope meter I see phase “B” and “C” are clipping at 690v, Phase A is still a sine wave but with some cross over distortion. Phase “A” peak is 840v. Any Ideas?
  2. jcsd
  3. Jan 19, 2012 #2


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    Staff: Mentor

    Welcome to PF! Is this a diesel powered 3 phase alternator?
  4. Jan 19, 2012 #3

    jim hardy

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    Science Advisor
    Gold Member

    is it connected to a load?

    has it been recently worked on?

    does it smell of hot insulation?
    Last edited: Jan 19, 2012
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