Multiple Choice
The domains of power system where directional over current relay is indispensable are
A) In case of parallel feeder protection
B) In case of ring main feeder protection
C) Both A and B
D) None of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q3: Reactance relays are used for phase fault
Q4: Impedance relay may use<br>A)Balance beam structure<br>B)Induction cup
Q5: A differential relay response to<br>A)Algebraic difference of
Q6: In an inverse definite minimum time, electromagnetic
Q7: Both voltage and current signals are required
Q9: Reactance relay is normally used for protection
Q10: The structure used in reactance relay is<br>A)Induction
Q11: Threshold characteristics of a plain impedance relay
Q12: Impedance relay can be used for<br>A)Phase faults
Q13: On transient fault OC and impedance relay<br>A)Under