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Why does a humming sound occur in high voltage transmission lines?

October 10, 2017 by betuk

DWQA Questions › Category: Transmission and Distribution › Why does a humming sound occur in high voltage transmission lines?
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betuk asked 6 years ago
3 Answers
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gunju answered 6 years ago

This computer humming sound is coming due to ionization (breakdown of air into charged particles) of air around transmission conductor. This effect is called as Corona effect, and it is considered as power loss.

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Geta answered 6 years ago

Whenever the voltage passing through a conductor exceeding a certain value the air molecules around the conductor got ionised. the ions moving in the atmosphere, they take energy from the supply so a hissing noise will occur.. this effct is called corona effect..

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betuji answered 6 years ago

The HT lines causes humming because of corona effect.when the voltage of transmission lines increases too much to produce electric field of magnitude of 10^7 v/m.That is more than the electric field required to break the inter molecular bond of the air molecules.Hence the air particle around the lines get ionized and start moving freely.and during this movement several collisions occur and resulting a humming sound.

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