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. 

Dear all, kindly give me the details of leectrical design engineer course details/institute in hyderabad /any where in india.

1 Answers   Reliance,

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What happen if a 18 watt fluorescent tube is used on 36watt choke,which one damaged or not damaged, if damaged why that damaged?

2 Answers   Bharat ITI,

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If we say that an cable of size 3.5X 50 mm sq. can take current upto 140 amps,is it the current of single core of the cable or of all the cores jointly.

3 Answers  

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What is use of starter and choke in tube light

0 Answers  

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in a diesel generator is there any relation between AVR to fule system?

2 Answers  

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how can we calculate fault current of a line in a 6 bus syatem if the faulted line is known?

1 Answers  

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why all selected supply voltage are multiple of 11

1 Answers   Gamesa, Suzlon,

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How can we increase the capacity of Energy.?

0 Answers  

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why the secondary winding of the transformer is not open circuited ?

5 Answers   Nepal Electricity Authority, Torrent Pharma,

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what is Aircraft earthing and what does it do?

6 Answers  

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What is the use of Gateway RTU like ABB RTU 560 in power plant, SAS system ?

1 Answers   ABB,

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the resstance of a thermistor is 5000 ohm at 25degreeC and coefficient is .04/degCel. A measurement with lead resitance of 10 ohm will cause an error of

1 Answers   GATE,

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