relays are used for phase faults on long line?

Related Mcqs:

Circuit breakers usually operate under______________?

A. transient state of short-circuit current B. sub-transient state of short-circuit current C. steady state of short-circuit current D. after D.C. component has ceased...

The current zero interruption, in oil and air blast circuit breakers, is achieved by_______________?

A. lengthening of the gap B. cooling and blast effect C. both A. and B D. deionizing the oil with forced air E. none of the above...

When a wave propagates on a transmission line, it suffers reflection several times at_____________?

A. tapping B. load end C. sending end D. sending and other end E. all of the above...

The single phasing relays are used for the protection of_____________?

A. single phase motors only B. two phase motors only C. two single phase motors running in parallel D. three phase motors...

Series capacitors are used to_________________?

A. compensate for line inductive reactance B. compensate for line capacitive reactance C. improve line voltage D. none of the above...