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The stator resistance of an induction machine is measured

  • A.by a direct current test on the stationary winding
  • B.from the readings taken during the no-load test at rated voltage
  • C.from the blocked rotor test readings alone
  • D.by observing the slip at rated load

Answer: A

A direct current measurement avoids any reactive component, and the result is corrected to the working temperature and, for a star connection, halved to give the per-phase value. It is needed to split the blocked-rotor resistance between the two windings.

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