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String Efficiency of a insulator string in an overhead line can be improved by:

AUsing a guard ring and longer cross-arms
BRemoving ground wires
CIncreasing the number of insulator discs endlessly
DUsing smaller conductors

Explanation

Guard rings equalize potential distribution across individual insulator units by introducing capacitive shielding, increasing string efficiency.

Submitted by: mcqstutor Team More Electrical Engineering MCQs →

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