Answer / naveen

SF6 is like VCB except arcing medium is Sulfer hexa fluride gas which is very good non conductive properties & reduces the arc flash it has all the safty relay I.e- over current.earth fault.sensitive earth fault transformer safty relays master trip relay tcs relay.

what is meant by dedicated earthing?

1 Answers  

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Iwould like to know barc interview questions

0 Answers   BARC,

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Is single load(eg: three phase motor) having all the components like positive,negative,zero sequence components during fault condition?

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respetsed sir, i have applied for section engg and juniour engg for both chennai and tiruvunabthapur boards for electrical deportments . can u suggest what books i have to follow and and also from which sections they r going ask (i mean weightage and what topics i have to cover) for both se and je for both chennai and tiruvunanthapur boards.......

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what is DG A,B,C,D check?

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what r the safety measures in UPS ? explain all?

0 Answers   Wipro,

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WhY PF low at Time of PT Missing in HT Meter

2 Answers   HCL,

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What is auto reclose system in Circuit breakers

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if current required for triggering thyristor at -30 degrees(temp) is 80 mA, what is the current required at 60 degrees

1 Answers  

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Help need in transformer !? Hello Friends The parameters of 2300/230 v 50hz t/f is R1=0.286 ohm R`2=0.319 ohm Rc=240 ohm X1=0.73 ohm X`2=0.73 ohm Xm=49.2 ohm Secondary Load impedance ZL=0.387+J0.29 solve the exact equivalent circuit with normal voltage across primery.. I know every thing but i cant find CURRENT I1=? and I`2=? Please help me give solution or only Formula please please...

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How over load relay works.

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what are the types of cooling systems used in motors?

2 Answers  

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