why phase to phase voltage is 400v while phase to neutral is 220v?

1 Answers  

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how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec.

0 Answers  

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Is it necessary to place tap changer in secondary winding or we can use on both sides?

3 Answers  

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Which are the major Nuclear power accidents in the world?

1 Answers  

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why the transformer neutral give to the earth ?

2 Answers   Jindal, JLL,

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why are we adopting 132kv,220kv for transmission rather than using 440kv at all transmission lines as it gives lower losses?

2 Answers   APGenco,

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What is the acceptable resistance range of UPS battery

2 Answers   Cisco,

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Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.

7 Answers  

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what happen when transformer connect on dc supply.

5 Answers  

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when we catch any one of the phases with our both hands in air(without touching ground),our body acts as a conductor.is it correct.please clarrify it.

4 Answers  

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what is the meaning of 0.5ohm Resistance

0 Answers   Vardhman,

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at meter room 50 hrc switch installed,but there are not get earthing proper,so what happen?and 11kv transformer out put going in to hrc main 400a three nog each? so earthing is require for all switch? (some customer made earthing at there home.)

0 Answers   Ebrahim Textile, Siemens,

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