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If a string of suspension insulator has three units, each can withstand a maximum 11 KV and total string can withstand 25.76 KV. What is the string efficiency?
  • a)
    234.1%
  • b)
    46.3%
  • c)
    68.75%
  • d)
    78%
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
If a string of suspension insulator has three units, each can withstan...
String Efficiency = [( flashover voltage of the string) / (n × flashover voltage of 1 unit)] × 100
Where ‘n’ is number of units in one string
Hence, String Efficiency = [25.76 / (3 × 11)] × 100
= 78%.
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If a string of suspension insulator has three units, each can withstand a maximum 11 KV and total string can withstand 25.76 KV. What is the string efficiency?a)234.1%b)46.3%c)68.75%d)78%Correct answer is option 'D'. Can you explain this answer?
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