What is the difference between sensitive earth fault and
restricted earth fault in power transformers?
Answer Posted / raghavendran
A Restricted Earth Fault (R.E.F.) has nothing to do with the
magnitude of the current. It is in fact a normal earth fault
that is restricted to a 'zone'. That is, the R.E.F.
protection is only looking for earth faults occuring in a
given zone. Any earth fault outside the zone (restricted
area) is ignored by the R.E.F. protection. It is typically
used on power transformers, with the protected zone
typically being between the star-point current transformer
and the phase transformers of the star-wound winding.
Is This Answer Correct ? | 23 Yes | 6 No |
Post New Answer View All Answers
In a flange coupling, the flange bolts are designed for
what are the components in electrical control panel (for example: 415V, 3-ph, panel to operate utility and 3-ph DG set).
what is induction furnance? how many phase supply given io its coil for 15 or 20 ton furnance?
Classify driling machines.
what is meant by loss of field in a DC motor? how a universal motor works?
How we calculate the Multiplying Factor of Kwh meter for 3 phase alternator.
Explain Need of a starter in a dc motor.? Also explain any two starting and speed control method of dc motor?
hi,every one, i have to write the search paper on "performance policy optimization" of NGN (next generation networks). i need the material on this topic. can any body help me. please tell me any useful site where the good material is available and name of any reference book. it should be a great help for me.
How many kw will suply from one db
What is the estimated total hydropower potential of india?
WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.
HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com
DERIVE AN EXPREION FOR MAXIMUM POER TRANSMISSION, WHAT ARE ITS APPLICATIONS.
We have given to 3phase supply to ups system & how can coming netural
what is the difference between interconnection and intraconnections in the circuit diagrams