Answer Posted / pillay

if the load is 350kw at o.92 and also at 0.98 than there is
no kw saving unless you are talking about the losses you
reduce as what Mr MS Narayanan has mentioned.

What is the power factor of an alternator at no load?

844

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Which do you think is the most significant cause of energy loss in a factory?

1771

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a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

965

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BSNL TTA EXAM QUESTION

1771

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how to calculate the lightning arrester conductor @ no of earth pits required

1617

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405

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1747

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1492

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What is pi controller?

672

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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?

1458

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excitation limit of an excitor

1529

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1971

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1764

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RESPECCTED SIR/MADAM- I AM PRERING FOR SECTION ENGINEER (ELECTRICAL) RRB CHANDIGARH PLEASE SEND ME SOME PREVIOUS YEAR QUESTION PAPER OR MODEL PAPER.MY EXAM IS ON (30- NOVEMBER 2008).I AM VERY THANKFUL TO YOU. FROM- HARENDRA SINGH YADAV

1621

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1516

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