Q.IDMT relays are used to protect the power transformers against 

  • AExternal short circuits 
  • BOverloads 
  • CInternal short circuits
  • DBoth (a) and (b) 
Correct Answer : (D)

Both (a) and (b) 

Hints :

IDMT relays are used to protect the power transformers against External short circuits  and Overloads.

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