Electrical Machines
Which of the following transformer insulating oil generally used in India?

 Aromatics based insulating oil.
 Naphtha based insulating oil.
  Paraffin based insulating oil.
 Olefin based insulating oil.

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Electrical Machines
In a star - delta starting of an IM

  applied voltage per stator phase is 57.7 % of a line volt
  reduced voltage is applied to the stator.
  resistance is inserted in the rotor.
  line voltage is 57.7 % of stator voltage.

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