Answer / iamdon

Vector group arises due to relative diference between
primary and secondary windings of the transformer.Since
each of such windings has some advantage over other so we
use all of them in particular apppliction.

Answer / k.prakashchandra

They are required for phase shifting or matching wherever
required, especially for measurements in electronic relays
and meters

what happen if one of 3-phase line has a much higher load when we are using delta to star transformer? how we can over-come from that?

2 Answers   Getco,

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Even motor protection, why motor burn out ?

1 Answers   Indorama,

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We have a 1275KVA existing Transformer in a power plant project. Customer want to get it test & confirm whether it is a Dyn1 Transformer or not. Pleae let me know how to test it.

1 Answers   Allied Group,

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why we use CVT (capacitive voltage transformer)in switch yard?

5 Answers  

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why generally transformer are in star to delta or delta to star used?

8 Answers   ABB,

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Why generator is not connecting in delta ..why connecting in star ?

4 Answers   Bhel, Foretec Engineers,

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If we give 2334 A, 540V on Primary side of 1.125 MVA step up transformer, then what will be the Secondary Current, If Secondary Voltage=11 KV?

3 Answers   L&T,

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How to control motor gearbox speed and friquency? If length of cable and dia given, how to measure the voltage drop?

0 Answers  

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If a generator of generating station produces 100MW rated output then what will be the rating of the step-up transformer connected to it?

5 Answers  

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Yazaki india pvt ltd interview questions qurey related

0 Answers  

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For 132 KV line, PT or CVT which is prefered for measuring & protection? is there any IS or IEE standard available?

1 Answers  

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WHAT IS MODULATION AND NEED FOR MODULATION ?

1 Answers  

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