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

i want all question & answers of the written exam

1 Answers   Essar, L&T, MES, RRB,

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What is the difference between Isolator & Load Break Switch?

7 Answers   Infotech,

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Why the Voltage rises when Leading Power Factor is occurs?

2 Answers  

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What is transformer saturation?

1 Answers  

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what is the clearance time circuit breakr?

1 Answers  

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how the 6.6KV motor can be used with 11KV?

2 Answers  

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What is meant by Reactor in power system and what are the uses?

11 Answers   EEE,

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Show formula which gives full load current 4.8 amps of a 3 HP motor and 27 amps of a 20 HP motor having 3 phase 460 volts, 0.8 Pf.

2 Answers  

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in india,we use 230V,50 Hz,whereas many other countries use 110V,60Hz.what r d advs and disadvantages of each of them?

11 Answers  

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100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.

0 Answers  

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What is the difference b/w chock and ballast?

2 Answers   Emami,

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current transformer cannot measure voltage or not ? then y we use P.T ?

1 Answers   Bhel,

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