Answer / koodalingam

To protect the primary winding of the potential
transformer.If you not earthed the system,the unbalance
voltage will appear between neutral and earth.This voltage
can damage winding.

Answer / vinod

in EHV single phase PT are using, primary one end need to
earth for taking stable 3 phase secondary from three single
phase PT

-----------means a source which can supply a constant voltage to aload irrespective of the valu of load resistance.

2 Answers  

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What is the multiplying factor if line ct ratio is 1000/1 and meter ct ratio is -/5 ?

1 Answers  

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What is effect of over voltage and under voltage on ACB

0 Answers   EFS,

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What is meant by reverse polarity and how it can be fixed?

0 Answers  

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WHY L-G FAULT IS MORE SEVERE IN TERMS OF RRRV?

0 Answers   Engineers India Limited,

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What happen while we measure the Current in Rotor?

1 Answers  

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Generator,motor and alternator Working principal Please explain easily

0 Answers  

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What happens if a +vely charged particle is placed in the centre of a room and assume that the north side wall is having magnetised with north polarity and south side wall is magnetised with south polarity. In which direction the particle will move

5 Answers   BSNL,

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what is the calculation of current when a clampmeter is attached to two phases of any drives.

3 Answers   ABB,

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Why reverse relay used

2 Answers   cpgn,

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what is load shedding

4 Answers   KSEB,

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How Grading Rings & spacers in transmission lines works?working principle?

1 Answers  

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