An efficient and a well designed protective relaying should have_____________?
Correct answer: D. all of the above
- A. good selectivity and reliability
- B. economy and simplicity
- C. high speed and selectivity
- D. all of the above
Explanation
Good protective relaying must combine selectivity, reliability, speed, simplicity, and economy. Since each pair names a desirable characteristic, all of the above is the appropriate choice.
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