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Recent content by electmags

  1. electmags

    87G when fault on transmission line

    When ever is a problem or surge on the transmission line our generator unit # 3 87G relay activate on A phase, why? All Ct's are ok, but when the surge capacitor for A phase is disconnect we trip on 59N.Do any have any idea why?
  2. electmags

    Generator current differential trip

    Thanx for inputs, We have the unit running it seens I had problem with cross current xfmer for excitation.
  3. electmags

    Generator current differential trip

    I'am running a hydro generating plant for the pass 12 years, adout a week ago I have one of my generating unit triping on 87G Generator current differential relay. For this pass week I have conduct all type of test on my stator,CT's, relay and wiring with no luck.When the fault started I ran the...
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