Q.The number of discs in a string of insulators for  400 kV  ac overhead transmission line lies in the range of 

  • A32 to 33
  • B22 to 23
  • C15 to 16
  • D9 to 10
Correct Answer : (B)

22 to 23

Hints :

The number of discs in a string of insulators for  400 kV  ac overhead transmission line lies in the range of 22 to 23.

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