Answer / nilkanth tailor

In old technology UPS, thier is transformer used to step
down the voltage and givet to that circuit..coz at that
time we have no power equipment like ( IGBT, MOSFET,
BJT)..But now by using IGBT or MOSFET, we can make ups
without any transformer..in modern UPS thier is no need for
any transformer..so we can reduce the size of UPS by using
this power device./..

Answer / aravind

use toroid transformer or pin type transformer it consume
low space compared to normal transformer..

what is the importance of neutral in elctrical system?

4 Answers   IOCL, Kharafi National,

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how meger function

0 Answers  

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Sir I hv to fix 20 ton ac how much electrical power need apply?

1 Answers   Sealand Restaurant,

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What will happen if the rotor of an induction motor is fed from a 3 phase supply and the stator short circuited ?

4 Answers  

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In stepdown transformer 11/415 volt two nos.(R & Y)HT side fuse is blown ,what will be voltage of ry,rb,yb in secondary side

5 Answers   NTPC,

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Why we get neutral from EB department, if not what will happen if we use earth instead of neutral? what is the result at the time of monsoon or rain with thunder and lighting ?

1 Answers  

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can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??

0 Answers   MCB,

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why scott connection is done why not two phases are directly picked at the output of 3 phase transformer??

1 Answers  

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where do we connect tap of tap changer, to H.V. side or L.V.side? and why?

5 Answers   Vedanta,

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why the transformer was not rotating like a motor?

5 Answers   TATA,

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What is the difference between online and offline UPS

1 Answers  

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what is electrical?

15 Answers  

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