how to find motor contactor rating and bimetalic relay rating? of 30kw motor which will operate on star-delta starter?

6 Answers   HCC, L&T,

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Please give me the formula stating relation between AC & Dc.

2 Answers   JP Group,

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in 3-phase transformer which type of transformet is used in output side?

6 Answers   Essar,

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why it is so called as xlpe(cross linked poly ethyline) cable?

0 Answers  

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whenewher three phase supply is given to induction motors revolving/rotating field is created & rotor rotates.When the three phase supply is given to three phase transformer then revolving,/rotating field is created or not? if not why?

1 Answers  

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Describe the test procedure to determine the vector group

0 Answers   MPSEB,

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how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

0 Answers   Sandhar,

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Is LV shorted in magnettic balance test?If yes why?

2 Answers   Hindalco,

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Generally In transformer Tap Changer on HT side, but I have seen in 66KV side in 220/66 KV, 100 MVA, Areva make transformer. Why ?

7 Answers  

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How Calculat the Cable Sizing of HT/LT System & Explian by one Exampal?

1 Answers   Siemens,

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1. If we apply dc supply to the primary winding of transformer it will be burnt out. similarly dc supply is given to field winding of syn. motor and armature winding of dc motor, they are safe. (Remember both windings inductive nature) what is the reason behind that?

2 Answers  

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What is the difference b/w earthing & grounding?

6 Answers  

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