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. 

in flemings lefthand rule thumb indicate for....

2 Answers   APPSC,

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Explain the iniluencc of short circuit ratio on the pert'orniancc of synchronous machine.

0 Answers  

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Alternator couple to diesel engine why, Alternator couple to ac service motor with gear drive for 1500 rpm possible (yes or no) aim to low input power supply give to motor then high output power taken for alternator Please answer this question

1 Answers   Turbo,

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what is the purpose of fuse?

7 Answers  

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why does in transformer the v/f ratio constant?

2 Answers   TATA,

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How can we calculate the KVA rating of a Distribution transformer from its core details?

0 Answers   ABB,

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why do we have spikes enough to burn electronic boards, when generators are not grounded

0 Answers  

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hi friends can u tell me name of the sites where i can get animation of electrical machines......

1 Answers  

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why we use ac as a electric appliance in home or daily use?

1 Answers   MNC,

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What are the conditions to be satisfied for parallel operation of dc generators?

0 Answers  

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what is the difference between inrush curent and jurk load.

2 Answers  

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Interchange 7 and 6 ,÷and× 36×7+4-7×3

1 Answers  

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