Why is the earth fault relay connected to the Yellow
Phase?

Answer Posted / k.prakashchandra

Earth fault relay is not connected any phase.The balancing
current is made to pass through this relay.In two EFR and
one EFR protection scheme,OCR s are usually provided on R
and B phases ,which makes one assume that the EFR is
provided on Y phase.You can have 3 OCR and 1 EFR protection
scheme also

Is This Answer Correct ?    7 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how invertor convert the dc into ac give brif detail

1539


What is the main cause of magnetism?

1587


DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS

1620


when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.

1583


what is the calculation involved to design the heater to heat 10KL of water in temperature control unit?

1481






can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)

1502


What is the instrument to check the rotating diode fuse of alternator in running conditions?

2014


In ht capacitor ckt we are using LBS Panel it having isolator with fuse, one of HT fuse flash over, so what is reason behind this event.

1585


How many types of interlocking use in screw type air compressor,make-Kaser(BSD MODEL)?

1605


why ten delta testing is carried out on power transformer

1359


how does this job compare with others you have aplied for?

1239


i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle

1511


what happen when increase or decrease size of lamp,light.glass.

1490


while starting a liquid starter ,is there any volage drop on water/soda on tank.can we touch the tank on starting?

1447


What facility we get after CT secondary earthing and how?

1725