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An induction generator connected directly to the network requires

  • A.a direct current supply to its rotor through slip rings
  • B.no connection to any supply
  • C.a mechanical brake to hold it at synchronous speed
  • D.the network to supply its magnetising current

Answer: D

The machine has no field of its own, so the reactive current establishing the flux must come from somewhere, and on a network it comes from the network. Standing alone, it needs capacitors and the arrangement is difficult to control.

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