Answer / neha koul

The ac mains supply we get in our homes are not constant, this is variable i.e the frequency goes up and down, if we directly use the ac mains power many of our home elctrical appliances may get damaged, so we need a transformer which transforms the voltage and make it constant at some specific value due to electromagnetic induction and time varying magnetic field. The specific value of transformer depends on us that what value we want to give by stepping it up or stepping it down.

Answer / kumar.m

We need transformers for using step down / step up voltage.
and eddy current lossing .

Sir, I m 3rd year student 4m DCE and want to do internship in siemens or l&t or any other mnc related to electrical engineering. please tell me the procedure 4 same and oblige me

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star delta connection used in reduce the starting current at 3 times . how its reduce the current please explian .

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Why earthing is required for diesel tank?

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How do you determine the size of transformer radiators in a transformer?

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what is the meaning of "i.p.-43" and duty cycle-s1 on the name plate of a asynchronous machine?

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Is there any Electrical supervisor license which gives permit to work whole India rather than individual state??

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all details of DG UPS HVAC

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check list of maintenance of transformer?

11 Answers   ABC, Cosmos, EPRON, Essar, Godrej, Hescom, Infosys, KPTCL, TCS,

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What is Scott connection? In which device it is used?

4 Answers  

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1> what r different types of fault in cables? How will u locate and test these faults? 2> why earth wire is provided on top throughout the transmission line. why not only on towers? How much area it can protect? 3> what r different types of transmission losses? How power loss can be minimized? 4> what is the % of power loss on transmission lines?

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Define phase lag and phase lead?

0 Answers  

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