What does protective relay provide?

Q.  What does protective relay provide?
- Published on 17 Nov 15

a. Provide additional safety to the circuit breaker in its operation.
b. Close the contacts when the actuating quantity attains a certain predetermined value.
c. Limit the arcing current during the circuit breaker operation.
d. Earth or ground any stray voltage.

ANSWER: Close the contacts when the actuating quantity attains a certain predetermined value.

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