Answer / shantanu

the transformer action is not possible with dc of constant
magnitude as the flux will not be genrated btwn primary &
secondary winding ..

Answer / sivakumar

it mean we are applying dc(constant) current to coil ,voltage is zero across inductor(transformer winding) so there is a short circuit occuring so it draws high current

Answer / abhinav kumar

Ac voltage waveform is alternate so genrate a mutual induction and dc is direct current so it is not genrate mutual induction

Answer / bapan

If Dc supply is given to atransformer there will be no change in the flux with time.so,there is no emf induced in the primary and secondary winding and hence transformer action will not take place.

Answer / r. p. siroih

The transformer works on the basis of to transfer the energy (votage) to stepping down or up in alernative mode. In the DC power the current flow in streight line, so transformer can not transfer the voltage .

I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?

0 Answers  

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what is resticted earth fault protection ? how did it protect & work in power transformer

3 Answers  

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what is VSWR?

1 Answers  

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What is Engine?

6 Answers   HSL,

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1 Answers   Omplas,

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0 Answers  

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how motor should be connected i.e star-delta or star-star or delta-delta ?

3 Answers   GSE,

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What are chief characteristics of state-space method and its techniques ?

0 Answers   Limton,

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11 kV line deraction check by an Engineer.

0 Answers  

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Why and when NGR panel required. Is it necessary to design a NGR panel for a 6.6kV Alternator paralleling with Grid????

0 Answers  

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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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Is single load(eg: three phase motor) having all the components like positive,negative,zero sequence components during fault condition?

0 Answers  

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