What is corona ? Mention its positve effects .
Answer / 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 |
Can any body tell me about Hi-pot test, and why it is necessary and its procedure of testing
for a 11kv transmission line what capacity of CTs & PTs are required?
Wat wil happen if Transformer is operated at 100 HZ Frequency?
what is inverter
WHAT IS MEANT BY TV TERMINAL IN 500MVA TRANSFORMER?
what would happen when synchronous motor will operate beyond syncronous speed?
HOW MUCH KVA DG SET REQUIRED for charging 12v 4000 ah battery?
Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage
Please specify the parts of VCB&ACB
what will happen if i connect the buchholz relay in reverse direction.
what is electric current
what is meant by CT burden = 10 VA?
Civil Engineering (5086)
Mechanical Engineering (4453)
Electrical Engineering (16638)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)