Multiple Choice
To prevent mal operation of differentially connected relay while energising a transformer, the relay restraining coil is biased with
A) Second harmonic current
B) Third harmonic current
C) Fifth harmonic current
D) Seventh harmonic current
Correct Answer:
Verified
Correct Answer:
Verified
Q1: Which is the main relay for protecting
Q2: The relay used for feeder protection is<br>A)Under
Q3: In order that current should flow without
Q5: The single phasing relays are used for
Q6: In the case of transmission line protection,
Q7: To protect most of the electrical equipment
Q8: ........ Relays is preferred for phase fault
Q9: Zero sequence current is used for relaying
Q10: Admittance relay<br>A)Nondirectional relay<br>B)Directional relay<br>C)Differential relay<br>D)None of the
Q11: Where severe synchronising swing occur, the relay