An isolator is installed_____________?
Correct answer: D. generally on both sides of a circuit breaker
- A. to operate the relay of circuit breaker
- B. as a substitute for circuit breaker
- C. always independent of the position of circuit breaker
- D. generally on both sides of a circuit breaker
Explanation
An isolator provides visible disconnection for maintenance and is not intended to interrupt fault current like a circuit breaker. It is generally installed on both sides of the circuit breaker so the breaker can be isolated completely.
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