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The zero power factor or Potier method separates

  • A.the direct axis from the quadrature axis reactance
  • B.the subtransient from the transient reactance
  • C.copper loss from iron loss in the machine
  • D.leakage reactance from armature reaction

Answer: D

A zero power factor test at rated current, plotted with the open circuit characteristic, gives the Potier triangle from which the leakage reactance and the armature reaction ampere-turns can be read separately. That separation is what makes it more accurate than either simpler method.

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