how u change the vector group of a transformer like DYN1 to ynd11

2 Answers  

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lightning arrester rating selection procedure: (line to line voltage(kV)/(squ.root of 3))*squ.root of 2. now the question is, IS this above formula correct for both STAR and DELTA connected system???

1 Answers  

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which Machine u will prefer to use at place where Flammable gases are coming out & why ??

6 Answers   NTPC,

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What is the diffrence between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

1 Answers  

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1.what is surge 2.what is lightning 3.what is switching 4.difference between surge,lightning,switching used in power system 4.definition of surgearrestor,lightningarrestor 5.adv and disadv of surgearrestor,lightningarrestor 6.uses and purpose of surgearrestorand lightning arrestor 7.block dia of surge arrestor 8.blockdiagram of lightning arrestor 9.operation and working of surge arrestor and lightning arrestor 10.basic formula of surgearrestor and lightning arrestor 11.basic diagram of surge arrestor and lightning arrestor

1 Answers   Crompton Greaves, Framo, L&T,

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what is meant by Ac & DC drives where its useful ? how its functioning ?

3 Answers  

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What is the arc. I saw word arc in between sf6 & vcb brakers

1 Answers   Cap Gemini,

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what is the different between rms and average value

1 Answers   Finolex, TATA,

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how to get electrical supervisour certificate in gujarat

0 Answers  

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What is circuit breaker failure protection?

2 Answers  

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why we not use capcitor in Three phase motor ??

2 Answers   GOMS, Power Electronics,

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Why is remote backup preferred to local backup?

0 Answers  

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