Answer / raj

Voltage is applied through open delta PT only.

Answer / ekanadam patlavath

dc 110 voltage used for relay operating. for reverse power
operetion

Answer / nur.asidik

to make polarisation

Answer / rajesh bodduna

Open delta voltage is used to check the direction of fault,
i.e secondary voltages are connected in delta fashion with
open at one end . . The directional earth fault relay will
get volatge from open delta and currents from CT's as inputs.

Answer / hamed

Directional Earth fault relay requires to Inputs line
Current and line voltage.
So in case of Current there are standard output of any CT
(either 1A or 5A).And for Voltage Inputs there is a
Standard Potential transformers witch give 110/(sqr.root of
3).

line and phase voltage relationship?

2 Answers   CPCL, IVRCL,

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how to identyfy cable sizes?

4 Answers   IAF, Mylan,

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Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.

0 Answers  

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The size and construction of bushings in a transformer depend upon?

0 Answers  

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considering the 3phase and single phase ac system the load applied and the volage given is same...will the current differs for both the cases are it wil remain same?

5 Answers  

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explain wiring system

0 Answers  

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how to design domestic earthing pit and earthing wiring?

1 Answers  

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what will be project cost for 100 kv transformer connection under oyt scheme.

0 Answers  

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what happens when the phase and earth wires comes in contact? and why

2 Answers  

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I am applying for NTPC examination.Can we please provide previous paper to my mail prasad.chintala108340@gmail.com

0 Answers  

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upto how many load can v connect to stabilizer which is used for tv

0 Answers   Sandvik,

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what is the signification of trivector meter? why its name is trivector meter ?

3 Answers  

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