Answer / electrix

When High voltage passes through bare conductor. The
voltage ionises the air around its circumference. This
causes the hissing noise and the same is called corona
effect.

Answer / sreemani84

its called as CORONA Effect. whenever high supply passing
to the open wire its react with moisture.

Answer / lakhan.self

When voltage gradient is or more then 21.2 KV/CM in normal atmospheric condition in overhead transmission line causes air ionized around the conductor resulting faint voilet glow,production of ozone gas and hissing noise called corona

How to calculate the cable size (XLPE)for suitable to 120KW load (if Motor or heaters etc)

4 Answers   SSC,

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What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?

0 Answers  

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How much current in 100 kva Transformer HT & LT side

1 Answers  

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what are the methods of speed control of dc motor???

4 Answers  

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what is corona effect?

39 Answers   ABB, Genco, Wipro,

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who invented active elements? plz give me the complte details of active elements...

0 Answers  

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Pls explain about vfd control?Where it is used, Give some example?

3 Answers   Siemens,

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The unit of quantity of electricity is the:(a) volt(b) coulomb(c) ohm(d) joule

1 Answers  

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A low wet bulb temperature indicates

0 Answers   Caterpillar,

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How stabilizer works??

0 Answers  

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How calculate the Transformer Impedence With Example

3 Answers  

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Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.

7 Answers  

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