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Question

The safety factor of insulator is defined as ratio of

A.

Flash over voltage to puncture voltage

B.

Puncture voltage to flash over voltage

C.

Current to voltage

D.

Current to power

Answer ( Option B)

Puncture voltage to flash over voltage

Solution

The safety factor of insulators is defined as the ratio of puncture voltage to flash over voltage. It is desirable to have high value of safety factor so that flash over takes place before the insulator gets punctured. For pin type insulators, the value of safety factor is about 10.

Hence, the correct option is (B).

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