Answer Posted / naresh

in case of dc ,the frequency is always constant .
where as in case of ac ,the frequency is defined as number
of cycles per second.

it is given by

F=(1/T).

Why the cores of large transformers build up of circular cross section?

2278

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What is meant by derating factor?

1202

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why is a power transformer used only occasionally?it is used to step up at generating stations?and that needs to be done all day long !!!!!!!

1856

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lamination figures

1838

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I want single line diagram for AMF & DG syncronizing panel

7170

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hi, could someone help me to find a control design for syncronising panel .

1683

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What do you understand by avr?

1018

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What is the de rating factor of cable? What is the importance of the de rating factor in cable select

2367

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could you measure current in parallel?

1085

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how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test. why transformer rating in always in KVA ? what ispositive, negative, zero sequence impedence? How ElCB tripping if Neutral touch with ground Why AC & DC capacitor are use in UPS ? why motor rating in KW? how to syncronize two dg sets

2163

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how to carried out tan delta test in 11 KV alternator ?

3051

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hi,every one, i have to write the search paper on "performance policy optimization" of NGN (next generation networks). i need the material on this topic. can any body help me. please tell me any useful site where the good material is available and name of any reference book. it should be a great help for me.

1905

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If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?

2180

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how to test the turn ratio of 3 phase transformer using volt meter shoe the curcit diagram.

2428

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how to Select Lighting arrester? What r the parameters to be considered for the selection of Lighting arrester ?

1715

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