Zero sequence current is used for relaying purpose only in the case of
A) Phase over current really
B) Phase impedance relay
C) Ground over current relay
D) Ground impedance relay
Correct Answer:
Verified
Q3: For ground fault we prefer
A)Plain impedance relay
B)Directional
Q4: Admittance relay
A)Nondirectional relay
B)Directional relay
C)Differential relay
D)None of the
Q5: The relay used for feeder protection is
A)Under
Q6: Which relay is used to detect and
Q7: Which one of the following relay has
Q9: To prevent mal operation of differentially connected
Q10: How many relays are used to detect
Q11: Which is the main relay for protecting
Q12: For protection of parallel feeders fed from
Q13: Relays can be designed to respond to
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