Insulation resistance of high voltage circuit breakers is more than________________?
Correct answer: C. 100 mega ohms
- A. 1 mega ohms
- B. 10 mega ohms
- C. 100 mega ohms
- D. 500 mega ohms
Explanation
High-voltage circuit breakers require very high insulation resistance to prevent leakage and flashover across open contacts; the conventional minimum cited in such questions is above 100 megaohms. This makes 100 megaohms the intended threshold.
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