No. of discs in a string of insulators for 400 kV ac

Q.  The number of discs in a string of insulators for 400 kV ac over head transmission line lies in the range of
- Published on 23 Nov 15

a. 32 – 33
b. 22 – 23
c. 15 – 16
d. 9 – 10

ANSWER: 22 – 23

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