Interested to Buy Any Domain ? << Click Here >> for more details...
WHY IS RESTRICTED EARTH FUALT PROTECTION NEEDED?? WHY CANT
DEIFFERENTIAL PROTECTION SUFFICE???
- 14 Answers
- 28960 Views
- I also Faced
- E-Mail Answers
Answer Posted / jwalant yogi
First of all, REF protection is used for the case of
internal faults of the transfomer.Secondly, in REF, usually
when the current flows back form the neutral to the source,
there is much larger current change in the neutral current
as compared to the phase currents.And Differential
protection usually works senses the changes in the phase
currents which is not much larger, that's why differential
protection and REF protection are totally different from
each other.each of them is having different significance
and used for a particular application.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
During FEED, you will have all the information with regards to cable. How will you calculate the MTO for MV and LV Cables? what are your considerations?
i need to give section engineer (electrical engineer) for RRB. Please suggest some book
how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????
PLEASE TELL ME ABOUT QUESTION PAPER OF UPCL ENTERENCE EXAM.
Dyn1 transformer vector group testing how to do
From reading, Under voltage relay used also as phase sequence relay now, Why I use under voltage and phase sequence relay in the same circuit (ATS)?
What are motor generator sets and explain the different ways the motor generator set can be used ?
am commissioning the trafo without connecting the neutral therefore unbalance will occur what is the alternative solution for this?
I am apply the AAI. So i want electrical sample question paper in technical with answer my id is vijayjobsmart@gmail.com
WHAT IS IM (INDEX OF MOUNTING )IN MOTORS
What is formula calculation size cable wire ?
what is quality factor in series resonance circuit and calculate the factor of voltage magnification? how it happens?
I want the details about BHEL company examination.Can anyone able to help me please.
Define non-touching loop.
What is meant by analogous system?
