Answer Posted / ahmed

Impedanc voltage value depends on the design of the transformer. decreasing this value means good transformer materials and vice versa.

Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

1904

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how  do you choose the cable size as per amps rating & the voltage drop for the same.

1849

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please write motor, transformer, Generator setting, fault level calculation of Tr.etc

2106

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what are the stresses in circuit breakers ?

2070

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please give me solution to rectify the emi(electromagnetic interference)

1975

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For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2382

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ROC converges if pole and zero lies inside a) origin b) z=1 c) pole d) zero ? Explanation please? if ROC does not converges then?

2999

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Is it possible to operate a synchronous 2-poles turbogenerator with a still-in-place faulted bar but electrically disconnected ???? If yes, should I act on the other phases as well ???

2010

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how will we calculate the copper wire load..

1988

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Pleae send me last 5 years of Question book about RRB chennai.

2351

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What is dc current source? Differentiate between ideal and non ideal current sources?

1553

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what are all the components required to assemble solar panel other than pv cell?

1566

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At what speed an electric car can run with 2 HP motor of weighing 400 kg?

1880

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how we calculate the short circuit capacity of the busbar in LV & HT?

1150

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I want to know Electrical Circuit?

2229

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