Answer / divya

carona phenomenon is the ionization of air surrounding the
power conductor.it is defined as self sustaineed electric
discharge in which field intensity ionization is localized
only over a portion of the distance between the electrons.

Answer / guest

corona is an phenomenon associated with all energzied
transmission lines. Induced current effect associated with
operation of high voltage transmission line.This effect
include audible noise.To produced tiny electric discharge
that can inoize air closed to the conductor.so the loss can
be occur in the transmission line.

Answer / chinmaya

The production of violet glow, hissing noise & ozone in a
transmission line due to atmospheric condition & spacing
between conductors is known as corona.

Answer / avinash pandey

when a transmission line is carried a high voltage then
the atmospheric ait near conductor get gharged and have a
sound, called carona effect.

Answer / javed ali

The flow of current between the two conductors of the lines
negligiblely smal for parctical purpose.When the electric
field intensity reacher 3 MV/Meter the error in visinity of
the condutor no longer remains a dielectric but it ionised
and become conductive.This electric breakdown is associated
by yhe following phenomena. A fair glow appears around the
conductor which is visible in the dark.there ais a tendency
of vibration by which a sound is produced.

Answer / anusha

WHEN TWO CONDUCTORS ARE CONSIDERED WITH LARGE DISTANCE
BETWEEN THEM, THAN ITS DIAMETERS.ON APPLYING A.C VOLTAGE
BETWEEN THE CONDUCTORS THE ELECTROSTATIC STRESS IS PRODUCED
IN SURROUNDINGS OF CONDUCTOR IN ATMOSPHERE WHICH CAUSES TO
FAINT VOILET LUMINOUS GLOW WITH HISSING NOISE ALOBG WITH
OZONE GAS,IN LONG TRANSMISSION LINE, IS CALLED CORONA
EFFECT.

Answer / simon peter

Its an electrical demerit which occurs during transmission on of Extra High Tention (EHT).It has very high voltage but low current (I).This transmission is done only of 3 phase (R,Y,B) or its multiples.
due to +ive charge(Phase supply) ,-ve charge mostly in rainy season of atmosphere .A electrostatic pull/attraction is created (OPP CHARGE)which results in humming sound or minute sparkling can b seen on the wire its known as corona effect.

Answer / sulagna das

When a high or extra high voltage transmitted in a
transmission line as long as the air is subjected to a uniform electric field intensityof peak value less than 3×10⁶V/m,the flow of current between the two conductors of the line is negligible for practical purposes.but when the Electric field intensity(voltage gradient) reaches reaches this critical value(3×10⁶V/m),the air in immediate vacinity of conductor surface becames conducive and looks bluish or violet and due to dielectric breakdown of air and vibrating tendency of conductor a hissing noise comes out,it is Called as CORONA.

Due to corona OZONE and OXIDE OF NITROGEN formed on the outside surface of the
Conductor,there is a loss of power,there is a radio interferrence and a faint glow appeares around the conductor which is visible in dark.The effect of this to the power system is known as CORONA EFFECT.

Answer / dilip kumar

The production of hissing sound, violet glow and production of ozone on the overhead transmission line is called corona effect.

Answer / chiranjeevi

it occurs due to the interaction between the moisture and
conductor

WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).

1 Answers  

What is mean by STUB protection?

0 Answers  

what is the fuction of electrical transducer in control pannel?

6 Answers  

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

1 Answers  

WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?

0 Answers  

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.

0 Answers   SCM,

what is the meaning of trippe time of circuit breaker

1 Answers  

Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

0 Answers  

i have one transformer 1000kva, 11/.433kv. we are using 200/5 amp. ct unit for measuring purpose, & one 800 amp. V.C.B Unit for the same t/f operate, i wants to known the primary current of T/F is only 53 amp. why we used 800 amp. V.C.B ? & 200/5 amp. CT Unit.

4 Answers  

why nutral and earthing wire connect with each other in main panel board.?

2 Answers  

wht factor are considered to design ACB( air Circuit reaker) 415V

3 Answers  

what is different between kvar & micro farad when its comes across the capacitor rating is it possible to convert kvar to mf or mf to kvar

1 Answers   Manipal University,