When a Fault Occurs in a High Voltage Transmission Line

question 13

Multiple Choice

When a fault occurs in a high voltage transmission line, what happens first?

• A)Circuit breaker operates then the relay.
• B)Relay operates and then the circuit breaker.
• C)Relay operates, then successively the isolator and the circuit breaker.
• D)Isolator operates, then successively the relay and the circuit breaker.

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