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
plz send me the procedure and syllabus for mseb exam
sir, what is the importance of Fault MVA. how to calculate fault mva of 33kv substation connected by 6.5 km line(single circuit with equal spacing) with 110/11kv transformer in 110kv susbstation.the fault mva on 11 kv bus in 110kv susbstation is 208mva.
What are the essential characteristics of signal flow graphs?
why core is useful for a transformer ?and also in its operation ?
for a 400kv t/m line with 10 ampere current will corona occur?
What do you mean by turns ratio of instrument transformer?
I would like to know that the fault curretn at base load and at 10% generation will be same? Fault level of BUS remain same with different generation?
what is the use of the circle diagram
Differentiate between kirchhoff’s first law and kirchhoff’s second law?
can you any one give exact mathematical relation between AC current and DC current?
hi friends ,iam working as genset AVR service engineer in electrical field from past 2 yrs throughout india . i plan to shift in some other job without travelling in same field because i con't travel,i dont know what i do for that so please guide me what job is suited for me,how i can serch the job please anybody helpme iam totally confused
What is the direction of current flow in ct secondary...means if the current is flowing from P1 to P2 then what will be the direction of current flow in ct secondaryw
What is difference between SMC supportg and Glass Fibre Reinforced Plastic Support.
what is PDU in transformer?? which company manufacture??
sir, i am 3 years diploma course pass out candidate.what type of certificate can i got in marine service.
