Why we use stones in switchyard?

3 Answers   Havells, L&T,

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what is the easiest method of short circuit current calculation ? pls. derive with a mathematical example in real life application.

0 Answers   Mepax, NEPCO,

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What is SF6 Circuit Breaker?

10 Answers   Sodexo,

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I have a 600VA numeriv digital UPS for computer only. It holds for 15 minutes only. but i am try to using home CFL Light I cant using UPS 2 or 3 secound automatic off .but computer ok how to change this is in to ups ?

1 Answers  

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in 220 kv substation,what is the mean of avr voltage reading? means at oltc temp. 36 the avr voltage was 109v.so what the mean of 109v

1 Answers  

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design of IGBT firing circuit for 11KV

0 Answers  

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What happen while we measure the Current in Rotor?

1 Answers  

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In case of legging current of 20°, pf is .94 and leading of 20°,pf is .94 , in mathematicaly both are same but in realy how it is differ ?

3 Answers  

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Why LVDT have secondary windings connected in differential 1. Higher out put 2. Based on the out put voltage-/+, helps to identify the direction of displacement 3. To establish a null/ reference point

1 Answers   GATE, PSPCL,

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we all know voltage is a force(emf), and the force always devides if 2 or more than2 loads are there but why does the voltage remains same is parallel, it must devide na ???

0 Answers   NTPC,

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Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction

0 Answers  

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OHMS LAW

9 Answers  

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