Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / rakesh
When an alternating potential difference is applied across
two conductors such that the spacing between the two is
large as comnpared to the spacing between the two , then an
electrostatic stress is set up , which gradually builds up
to make and makes the air around the conductor conducting ,
if he potential difference is increased to the extent that
exceeds the visual critical limit then comlete breakdown of
air takes place , and is accompanied by faint luminous glow
of violet colour , production of ozone gas , and hissing
noise .
DISADVANTAGES : 1. There is a definite los of power .
2. The corona current is non sinusoidal and hence causes
some disturbance to the neigbouring communication lines .
3. The ozone gas produced reacts with the conductor and
corrodes it .
ADVANTAGES : As the air becomes conducting so there is a
virtual increase in diameter of the conductor and henc
decreases the resistance.
2. It acts as a safety valve for neutralizing lightning
surges and overvoltages caused ddue to other transients .
| Is This Answer Correct ? | 8 Yes | 1 No |
Post New Answer View All Answers
how to design coil turns ?
how to design step down 12 V, 1mA small transformer from 220 V AC? Because according to VI relation and power transfer it results bulky...
what's the difference between abs/inc encoders. apart from the position remembrance what are all the other differences. and what's mean by grey code.
What is mathematical model of a control system?
what is the main parts of transformer? how it is functioning? pls giv the ans briefly.
What happen when change order of CT in GIS feeder?
What is George phenomena to start the synchronus machine?
Explain Even and Odd signals?
What is transient Phenomenon?
What information we need to prepare relay coordination chart
iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.
i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.
-What shall be short circuit current of LV switchgear for a 1000 kva, 11.415kv, 3 phase tranformer with 5% reactance.
What is an automatic controller?
what is meant by 3rd hormonics ?
