Answer Posted / prithvi narayan sinha

kw/kva=cos(phi)

therefore kVA=kW/cos(phi)

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

1623

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what is the purpose of silicon dropper used in battery charger?

6665

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What are the advantages of stationary armature and rotating field system?

704

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to vary valtage from 0 - max a variac is necessary . so how to design for high power applications nearly about 200KW power

1595

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i installed 100kva ups. what KVA genset they should provid in input side? plz any update formula or ans with reason.

1867

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how we can calculate the efficiency of a diesel generator ?

1165

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how to minimize earth resistance upto 2Ω, if the resistance is 6 Ω ?

1454

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From reading, Under voltage relay used also as phase sequence relay now, Why I use under voltage and phase sequence relay in the same circuit (ATS)?

1317

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what is the formula to calculate voltage drop/loss on 66KV Transmission Line?

3227

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why asa method ZPF method is more accurate than ASA method?

5329

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State and define ohm’s law?

679

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Dear sirs, pls check this 4-20ma to RS485 module datasheet,pls guve me some suggestions. http://www.szsunyuan.com/sy/pro_more.asp?Productid=539 Thanks. E-mail:yunianjiang99@gmail.com

1679

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I'm looking for a mnaual set for a Teradyne J750. Softcopy would be preferred but I'll take what I can get.

1755

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please send privious years question papers of jindal steel and power ltd.My e mail id is rajanikant.sngh@gmail.com

1641

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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

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