Answer / mohd rehman

corona is hissing noise in the high voltage transmission line in which the air is ionized then a noise creating

Answer / pankaj

corona loss can be defined as the energy wasted in ionisation of air around overhead transmission line.

what is the std. earthing resistance for 440V system or m/c, 33000/440 Volt substation? What is the std.?

2 Answers  

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What is true sine wave or pure sine wave inverter?? Is it sine wave or step wave?? If it is step wave, waves with how much step is considered as pure sine wave? Is it possible to produce pure sinewave using power electronics?

0 Answers  

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What happen if an alternator rotates in reverse direction?

3 Answers  

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HOW TO WORK A VFD?SAY SIMPLE METHOD

1 Answers   GE,

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I have recently seen a transformer which had two primary terminals and was connected between two lines,i would like to know what kind of transformer is it?short discription about it,any advantages,purpose of usage of the same.............

8 Answers  

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Sir, I need a power supply at 380V. The supply I get in three phase is rated 415V. The total supply I have from the supply company is 70KW. Kindly inform if it is better to use a voltage stabiliser for this purpose or a transformer

3 Answers  

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How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter

2 Answers   GRB,

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how to calculate single phase motor efficiency ?

0 Answers   Bhel,

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How is the percentage impedence of a transformer fixed at design stage???

0 Answers  

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definition of transponder?

1 Answers  

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What is the similarity and what is the difference between relays and PLC?

3 Answers   NTPC,

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What is different between hypo test and megger test

2 Answers   ABB,

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