Answer / saqib ziya

dielectric strength

Answer / asit

insulation registrant= ro/2pel(log r2/r1)
inversely proportional to length 

what is the difference between id fans and fd fans

12 Answers   Perkins Thermal Systems,

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Define conversion efficiency of a power amplifier.

0 Answers  

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What happened when the field winding of dc series motor is open?

2 Answers   Bhel,

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What is application of isolation transformer & How it works.

2 Answers   BARC,

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This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

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what is the Maximum voltage range for single phase

4 Answers  

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why Copper loss is represented as I square R ?

5 Answers   L&T,

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if single phase is 230 v three phase is 440 v then what about two phase?and why is it so?

2 Answers   Eicher,

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sourse is 66 KV / 350 MVA, transfarmer is 1000 KVA 6.6 / 0.415 kv, iF fault is 28.75 MVA on 0.415 KV Bus then calculat the Transfarmer Impidance

0 Answers  

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in 5 mva transformer 33/11 kv s/s what rating of capacitor bank is required & what is the fourmula for rating

6 Answers  

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what is transformor oil gread

0 Answers   Idea,

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Why don't connect earth wire to elcb?if earth fault occur,how will detect it

1 Answers   TATA, Tata Communications, Telecommunications,

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