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The following is the apparent disadvantage of auto transformer as compared to two-winding transformer
  • a)
    power rating is greater
  • b)
    efficiency is low
  • c)
    conductive isolation is not present
  • d)
    voltage regulation is low
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The following is the apparent disadvantage of auto transformer as comp...
Drawback of auto transformer
(1) If the transformer ratio K1 is far from unity, then the Auto transformer would not be economical one.
(2) The short circuit current in Auto transformer is higher than the short circuit current in two winding transformer.
(3) The main disadvantage of autotransformer is the direct electrical connection between low tension and high tension side, so it might be possible that the insulation of Cu may fail due to which a large current flow in windings.
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The following is the apparent disadvantage of auto transformer as compared to two-winding transformera)power rating is greaterb)efficiency is lowc)conductive isolation is not presentd)voltage regulation is lowCorrect answer is option 'C'. Can you explain this answer?
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