In three phase, phase to phase voltage is 440 Volts, but the three phase motors are designed for 415 Volt, 50 hz, why

1 Answers   Shree Ram, Shriram, Sri Ram,

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Differentiate between digital phase converter and ordinary phase converter.

0 Answers  

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why the air gap is necessary in the transformer core

1 Answers   Eskom,

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How to Convert horsepower to kva? what is the three phase formula? email me if u know thanks Rehan smileavail@msn.com

3 Answers  

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what is the effect of power factor on DG supply,i mean to say what will the effect if we add capactors on dg supply.

4 Answers   HCL,

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1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.

0 Answers   Wipro,

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Why Lightning arrester used? Can we use piece of iron as a core material of transformer, if No, why? In CRGOSS material what is meaning of cold rolled grain oriented? Why Impegrenation of Transformer is done? Properties of Insulator? what is phase angle? Testing of transformers (Routine & Monthly)?

6 Answers   NTPC,

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on a three-winding transformer relationship delta-delta-star, on third winding why the relationship is a star? what are the advantages and disadvantages? Thank you and please help

0 Answers  

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IN star -delta motors normally first operated in star mode {absulated given (r-y-b) phases after one miute change in delta mode in this case i am change phase sequience for example R -PHASE TO CHANGE Y-PHASE ;Y-PHASE TO CHANGE R-PHASE SO THIS TIME MOTOR WILL HAPPEN RUNNIG MODE EIGHTER(OR) STOP MODE(TRIP MODE)

6 Answers   MacLellan,

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why using eleven's multiple for substations?

2 Answers  

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What will happen if mains neutral and generator neutral shorted?

2 Answers   Betts, Suzlon,

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what is the ckt diagram of a tubelight and is it the simplest ckt of electrical engineering and also the component?

0 Answers  

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