Why are some relay circuts designed to have the ct current
flow through the neutral instead of the phase wire, such as
in some diff relays?

Answer Posted / haseeb

this type of circuit is for the REF protection that is
restricted earth fault protection, where the current is
taken from neutral CT where as for over current current is
taken from phase CT

Is This Answer Correct ?    4 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is Surge Capacitor? Why it is use in Generator Circuit Breaker?

4608


What is UPS and How do you maintain the UPS Maintenance? Brief Description on UPS maintenance.

2128


Why the earth to phase voltage is high 250 compare to other two phases

1060


oil cooled transformer

1770


What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.

2266






Define piezo-electric effect?

712


WE HAVE THE DC RECTIFIER 1500A, INPUT VOLTAGE IS 3 PHASE. HOW TO CALICULATE THE LOAD? 3 PHASE SIDE EITHER dC SIDE. PLEASE SUGGEST ME

1411


i have interview in Pepsi company what type of question will ask please send the question and answeer

2988


WHAT IS SUBSTATION & ACCORDING TO VOLTAGE HT,EHT SUBSTATION EXPLAIN IT

2695


Sir pl provide 5 year sample paper for post junior engineer(electrical).I have currently applied for junior engineer (electrical) on RRB Ajmer

3191


compare between starting charactristics of synchronous motor with those of 3Q Squirrel cage induction motor

1276


List out the different frequency domain specifications?

760


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

1622


how to check regenerative load in drived motor

1708


how to calculate power consumption in slip ring motor at different step

1712