Answer / r.k. gupta

We are using IGBT & SCR in UPS system because these are high frequency switching with high current devices. which are used in UPS for inverting the supply from DC to Ac during battery backup of UPS. 

how the aircraft outer body and inner body is separated ?

0 Answers  

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Difference between hopkinson and swinburne's test

1 Answers  

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can we install LT panel & HT panel in one room?

1 Answers  

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Write a note on materials used as a fuse element.

0 Answers   Bhel,

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how can we can take BDV test in transformer?

5 Answers  

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What are all the problems occured while ac generator running in leading power factor at full load condition?

1 Answers  

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What would be the size of wire used for 2 Ton of window A.C?

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How can ou verify the size of conductor 50Sq.mm ACSR

0 Answers   Adani Power, Apar, EFS, Polycab, WHF,

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What is the full form of PSD & CSD ?

6 Answers   NIFT, PNG Power, PSD,

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what is the power rating of CPU, CRT type moniter, LCD type moniter,scanner Approx.

0 Answers   HAL,

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Why is earth connected to neutral on transfomer installations

2 Answers   VACC,

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While converting delta into star or star into delta ,the three values of resistances remains unchanged .Find out the value?Let In star R1=x;r2=x;R3=x On converting into delta,R12=x;R23=x;R31=x Find the value of x

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