With the recent weather - I've noticed that the pylon by my tram stop buzzes and crackels continuously. This used to be the same at somewhere I worked. Why does this happen? - I know there is more moisture in the air - but is that the cause?
2006-12-26 11:38:21 · 6 answers · asked by Stanleymonkey 2 in Science & Mathematics ➔ Weather
It's called flash over. Moisture in the air causes leakage of high voltage over the insulators making a sizzling noise. High tension voltage of the long distance transmission lines are typically about 330,000 Volts.
The hum you speak of is called magnetic hum. It is generated by the huge alternating magnetic fields caused by the very high currents (up to 4000 amps) in the transmission lines.
2006-12-26 11:56:58 · answer #1 · answered by Jules G 6 · 0⤊ 1⤋
yea- the moisture touches any electricity on the pylon and fries- wot u hear is the water being boiled and evaporating v. quickly.
2006-12-26 19:40:30 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Maybe they get bored and just like to pass time humming a tune
2006-12-27 07:28:12 · answer #3 · answered by sha2000_uk 2 · 0⤊ 0⤋
The wintry weather puts them in a melancholy mood.
2006-12-26 19:42:53 · answer #4 · answered by Anonymous · 1⤊ 1⤋
It happens wen it rains too! so the answer to your question is yes, that is the cause!
2006-12-26 19:41:14 · answer #5 · answered by Anonymous · 0⤊ 0⤋
its a safe,ty device to let things know that they are there
2006-12-27 10:39:30 · answer #6 · answered by deep 6 hal 2 · 0⤊ 0⤋