For a 400 kV, 50 Hz five pin insulator setup provides the protection w – McqOptions

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1.	For a 400 kV, 50 Hz five pin insulator setup provides the protection with an efficiency of 87.4%. The same setup is now meant to be used at the frequency of 60 Hz, the updated string efficiency of the system will be ____________
A.	87.4
B.	91
C.	82%
D.	86%
Answer» B. 91

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