how to calculate KA rating of C.B?explain with Formula.

1 Answers  

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How to minimize the eddy current losses?

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why star point of HT motor not earthed?

0 Answers  

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what is load despatching

0 Answers   NTPC,

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america 60hz electric supply is used; but india it is 50hz; why? and if we use 60 hz supply what changeg has to be done or all the equipment has to be thrown which has rating of 50hz frequincy

1 Answers  

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If we feed 230V ac supply to a full wave rectifare, what & how much will be the out put voltage?

3 Answers  

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y we use neutral,all r told its used to for closed path..k its a just used to closed path,in a transmission line y we put same conductor used n both phase and neutral..if we use less than phase conductor in neutral mean we ll reduce cost its right r wrong..if we use mean any problem occur in transmission line..

0 Answers   ME,

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I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

0 Answers  

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IF 3 NOS.OF HEATERS,3KW CAPACITY EACH,1 NO.HEATER CONNECTED IN R PHASE,1 IN Y PHASE AND 1 IN B PHASE.THEIR END POINTS CONNECTED IN STAR.IF I CONNECT THIS STAR POINT TO NEUTRAL OR DO NOT CONNECT TO NEUTRAL.WHAT WILL THE DIFFERENCE.

3 Answers  

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How impulse levels are calculated that for 11kV impulse is 75kvp, for 24kV impulse is 125kvp ?

0 Answers   L&T,

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What is the operating principle of turbo-generator.

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What is the deffirant between EARTH, GROUND AND NUTRAL

4 Answers  

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