Q.The regulation obtained by synchronous impedance method in an alternator is always higher than actual value because

  • ASynchronous reactance is assumed variable while it is not
  • BEffective armature resistance is assumed constant
  • CSynchronous reactance is assumed constant while it is not
  • DField current is increased to give short circuit current about twice of full load current.
Correct Answer : (C)

Synchronous reactance is assumed constant while it is not

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The regulation obtained by synchronous impedance method in an alternator is always higher than actual value because Synchronous reactance is assumed constant while it is not.

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