Answer / mak

the secondrary ll produce a demagnetising flux which makes back mmf..so more current is drawn in primary side to neutralise it..

Answer / akash

all the time core losses same .but copper losses change due to ambient temp.on full load efficiency maximum.

I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)

0 Answers  

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What is the criteria in selecting Air circuit breaker(ACB) & Moulded case circuit breaker(MCCB) for a particular range?

3 Answers   DLF,

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What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage.

0 Answers   PNG Power,

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I am selected in OCL(Orissa cement Limited), but they have a Tech PI round their at their plant.Anybody has any idea that what kind of questions they are going to ask??Please guies help me. I am in serious headache.I have heard that huge elimination is done at there.

0 Answers  

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when we change tha taps from 1-16 in 100mva tr whether a constant voltage avaliable till it reaches tap 16 or voltage change as per taps change

1 Answers  

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Electrical Diagram of Electric Arc Furance from transformer to Furances

1 Answers  

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if i am in front of transmission line how to know that current direction without any equipment

0 Answers  

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IS RTCC AND OLTC REQUIRED FOR 500 KVA 11KV/433V TRANSFORMER FOR AN INDUSTRY?

7 Answers   IGCAR, TNEB Tamil Nadu Electricity Board,

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define frequency ?

14 Answers   KPTCL,

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My switchgear busbar is rated at 2000A and just imagine the actual load on busbar is 1000A. From that busbar there are 10 outgoing feeders. Now the question is will the load be 1000A on each outgoing feeder or 100A per outgoing feeder. 2nd thing how do i calculate the load on individual feeder. Thanks for your time. Please provide some clarification on this issue.

1 Answers   Alstom,

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what is the principle of operation of CFL ??

0 Answers   IOCL,

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What is the use of core in the transformer?

19 Answers  

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