Answer / vinod

IN STAR CONNECTION THE VOLTAGE IS REDUCED TO SQRT(3),SO
THERE IS REDUCTION IN VOLTAGE & PROVIDES SAFE STARTING

Answer / raj

iT ALSO DEPENDS ON THE SYSTEM FAULT LEVEL OTHERWISE EVERY
ONE USING DOL STARTER.IF THE FAULT LEVEL IS WELL SUFFICIENT
U CAN USE DOL STARTER.

Is a current transformer step up or step down ?

2 Answers  

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My system is 22kv/3.3kv transformer. client is asking to use NGR, but as we have dedicated Neutral Earthing systems which has a value less than 1 Ohm. So i want solid comparision. Why i should not use NGR as my system is already protected.Can any one help me to get out of this.how should i reply on basis of some great comparision and calculations. Please help

2 Answers   Ariel,

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how do find power factor in practically and what it means?

3 Answers  

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how motor should be connected i.e star-delta or star-star or delta-delta ?

3 Answers   GSE,

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Our transformer capacity is 500kva & voltage ratio is 11kv/433v step down tf.Now i need to know if my input voltage is 10500v and what would be the secondary side voltage i.e output voltage ?

3 Answers   Helma,

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in an electronic tri vector meter when the current and voltage sequence changes ? what is the effect of phase sequence on recording of meter

0 Answers   L&T,

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A copper wire of length l and diameter d has potential difference V applied at its two ends. The drift velocity is vd. If the diameter of wire is made d/3, then drift velocity becomes

1 Answers  

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what u meant by shock ? whether it depends on voltage or current

12 Answers  

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What is the difference between Neutral and Eatrh?

8 Answers  

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Why do we give DC excitation to AC Synchronous motor??

9 Answers   Lance, MBM, Polycab,

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Which capacitor is used in ceiling fans ?

1 Answers  

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which type of winding is used for high voltage & low current?

1 Answers   GEB,

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