Why humming sound occur in extra high tension transmission lines?

The noise is better described as 'buzzing', rather than 'humming', and it is caused by the breakdown of the air's insulating properties, due to stress caused by electric fields set up in the vicinity of where the conductors are supported from insulators. The noise is accompanied by a pale blue discharge which becomes visible after dark.
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What is the reason for humming sound in transformer?

1. THE INSULATION IS DETERIORATING2. LOOSE TERMINATIONS3. NO RUBBER FOOTING INSTALLED4. OVERLOADING / UNBALANCED LOADING 5. Magnetostriction. When the core becomes magnetised, (MORE)

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In Physics

How does tension occur?

Tension is a force acting on a body and it occurs when the body is in a state of work.The direction of force acts on the opposite direction of work done.

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Why the transmission line are at high voltage?

To reduce the power losses or conduction losses in transmission lines. - Yes its right. I will give a slightly improved answer. The size of coper conductor used for transmis (MORE)

Why hissing sound in high voltage over head line?

EHV and VHV substations tend to have a signature hum; this is due to small electrical arcs. This is normal. Most of the time this will not be audible on VHV and EHV power line (MORE)

What animals make a humming sound?

these are the animals that make a humming noise: 1. humming bird2. alpaca3. locusts4. rabbitsthere are more,but that is how much i knowsorry!

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