what is resticted earth fault protection ? how did it protect & work in po

what is resticted earth fault protection ? how did it
protect & work in power transformer

Question Posted / amir_7442

3 Answers
5848 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what is resticted earth fault protection ? how did it protect & work in power transformer..

Answer / siva

The restriction of current flow from the Earth Faults which
are Caused outside the Circuit of the Protected Equipment is
called Restricted Earth fault relay.

It is act as defense from nuisance!

Is This Answer Correct ?

4 Yes

0 No

what is resticted earth fault protection ? how did it protect & work in power transformer..

Answer / jrk

EARTH FAULT CAUSED WITH IN ZONE IS CALLED RESTRICTED EARTH
FAULT.

Is This Answer Correct ?

2 Yes

0 No

what is resticted earth fault protection ? how did it protect & work in power transformer..

Answer / sumit

REFP is mainly used for high speed tripping on star connected earthed secondary winding of power transformer

The relay does not operate for fault beyond the protected zone i.e neutral of the transformer.

Fault occurring near neutral is having small current becoz of small voltage which results in low fault current. To attend this fault the relay must be too sensitive to operate .To operate, the relay is set for the earth fault current of the order 15%of the rated winding current which protects restricted portion of the winding.

Is This Answer Correct ?

1 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.

0 Answers

How CT & PT ratings are decided for a 11KV or 33KV transmission line?

3 Answers

what are the effects when a salient pole alternator is run at high speed like 3000 r.p.m?

0 Answers

what is mean by single phasing used for electrification in rural area of maharashtra ?

1 Answers

as a electrical student why should i hire you?

0 Answers TCS,

is it possible to start a motor in felid connected to a remote mcc

0 Answers BIET,

how i sync. the different size of generator.

4 Answers ISB,

I am doing apprenticeship training at HT switch yard in NLC. How can i get electrical c license. ??? What r the rules for getting it as an apprentice? ??

0 Answers

how to calculate IR value of 33KV cable ??

0 Answers

how to calculate cable size in transformer, distribution side?

1 Answers

what is the diference between base speed and rated speed in motor

1 Answers Bhel,

How colour picturetube works & how many year it will works.

0 Answers

For more Electrical Engineering Interview Questions Click Here