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In phantom loading the current circuit is supplied from

  • A.a separate low-voltage source
  • B.the same supply as the pressure circuit
  • C.a direct current source
  • D.the secondary of the meter's own current transformer reversed in connection

Answer: A

Rated current is forced through the few thick turns of the series magnet by a source of only a few volts, because the impedance of that circuit is very low. The phase between the two sources is adjustable so that any power factor may be simulated.

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