how set earth fault over current in relay

Answer Posted / j.kesavan

POWER CIRCUITE R,Y,B PHASE USING THREE CT ,THIS CT OUT PUT
CONNECT IN OVER CURRENT AND EARTH FAULT RELAY , IF ANY ONE
PHASE TAKE MORE CURRENT OR EARTH FAULT THIS RELAY WILL
TRIP.SETTING THIS RELAY MINIMUM CURRENT,MINIMUM DELAY.

Is This Answer Correct ?    2 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Define damping ratio.

783


why occ characteristics curve in not tracing back when we are bringing back the rhoestat?

1438


How many types are using in 220kv/400 kv swith yard

1752


Why derivative controller is not used in control systems?

657


how we can calculate 2 phase welding transformer rating or total power?

1411






How would your past experience translate into success in this job?

6458


What do you mean by turns ratio of instrument transformer?

626


why constant voltage transformer should be start without load? and if started then what will happen?

1618


Dear Sir/Madam, I have one questions we have three steam turbines and one Gas turbine and our industry linked with the public network, we have protection system one of the protection is reverse power we can export just four MW only i would like to ask about how to calculate the reverse power. Thank you in advance best regards

1641


WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.

1631


how current is reverse from its normal direction during the fault?

1996


what happens when series resonance occurs?

1393


how dia of wire and angles are calculated for overhead shielding wire to protect substation equipment from lightening strokes???

1574


delta motor winding resistance I take normally single winding is 2.5, which value is came delta connection ie RY ?

1542




1906