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!

Answer / jrk

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

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.

which motor used in electric train ans how much volt.

4 Answers   Trimax,

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if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.

0 Answers  

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What is the real use of reactive power in a electrical system other than loss (inductive &capacitive).I want to know its real physical significance.

0 Answers  

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1ampear me kitna watts hota hai aur elcb ka pura naam kya hai

18 Answers   Al Khayyat, Alpha G, BEC, Bhel, CGS, Electrical, Fiem, Firmenich, HLG Habtoor Leighton Group, Jash, Kandia, Maruti Suzuki, Minda, NTPC, ONEIC, Pace Process Controls, SMTC, SR, Sunrise Electrical, Sushil Enterprises, Suzlon, Voltage,

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what is bausbar?

4 Answers   Essar,

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what do you mean by mf of energy meter & its formula?

4 Answers  

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Difference between field rheostat and armature rheostat.

0 Answers  

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Why can not you store AC power in battery like DC power?

1 Answers   NTPC,

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how can we design robots

0 Answers   Maruti Suzuki,

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Why a Transformer Noise during its running condition ??

11 Answers   NTPC, UPPCL,

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In a Synchronous generator, Can AC voltage be used instead of DC voltage in field winding of rotor to produce AC power?

10 Answers   NTPC, Windia,

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what is the difference betweem star connected motor & delta connected motor?

13 Answers  

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