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It has been seen that intense corona effects are observed at a working voltage of 33 kV or above.
Therefore, careful design should be made to avoid corona on the sub-stations or bus-bars rated for 33kV and higher voltages otherwise highly ionised air may cause flash-over in the insulators or between the phases, causing considerable damage to the equipment. The corona effects can be reduced by the following methods :
(i) By increasing conductor size. By increasing conductor size, the voltage at which corona occurs is raised and hence corona effects are considerably reduced. This is one of the reasons that ACSR conductors which have a larger cross-sectional area are used in transmission lines.
(ii) By increasing conductor spacing. By increasing the spacing between conductors, the voltage at which corona occurs is raised and hence corona effects can be eliminated. However, spacing cannot be increased too much otherwise the cost of supporting structure (e.g., bigger cross arms and supports) may increase to a considerable extent.
What else can I help you with?
What is a corona effect?
http://en.wikipedia.org/wiki/Corona_discharge
How Hollow conductor is used to reduce corona loss how does it reduce the loss?
to have large diameter without increasing its weight.
Why more humming noise in HT electric line?
corona effect
What are the Advantages of Corona in transmission lines?
Due to corona effect virtually conductor size is increase and therefor resistance in transmission line is decreases.so I2R losses will decreases...
What is corona power loss in transmission line hvdc?
A: Transmission lines while there is ceramic insulators providing separation to the phases will have a corona if the insulators are dirty providing small current leakage ionizing the air around it therefore corona effect.
What is corona effect in electrical?
When the distance between two conductors is more than that of the diameter and the potential difference is increased beyond the certain limit in such a way so that a glow ( seems like violet and shine ) is produced around the conductor and also noise is produced. This kind of effect called the Corona Effect in power systems. As the potential difference is increased, Corona Effect is also increased, and due to Corona Effect, Power loss in power system and disturbance in the nearer communication line is also increased.
What is the minimum voltage required to avoid corona effect?
In air at sea level, 327 V peak.
How do you reduce fringing effect?
Hi, if you really wanna reduce magnetic fringing effect, then you have to keep + side in water for two days and then can have a test of effect streangth, it will be reduced to 50%.
What is the difference between bundled conductors and composite conductors?
Bundled conductors are used to reduce the effect of corona. As in place of a single conductor. two conductors are used in parallel the voltage gradient build up is less and thus the ionisation of the surrounding air is decreased. Therefore the effect of corona is reduced.
corona?
corona test
What nicknames does Kristen Corona go by?
Kristen Corona goes by Corona.
How does the axolotl effect our ecosystem?
They crawl into discarded Corona beer bottles with all their friends for a rousing game of "axolotl in a bottle!"
