Lightning Arresters - What You Need to Know (33 - Electricity Distribution)

Learn to identify lightning arresters on utility poles and learn how they work.

Full edX course with interspersed practice problems to help you learn:

Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore.

Video filmed and edited by Cheryl Lim.
@randomcheryl
#shorts

[awesomegaming]

Some higher voltage grids have special cut off breakers. I learned this when large power lines that I live nearby, have gotten stuck by lightning and cut the power off in our entire neighborhoods and towns. About 20-30 seconds later, the power comes back on.

[arianduran]

The arrester works after the fuse gets hit, the fuse directs the lightning, then the off fuse redirects the lightning to grown . Fuse goes on off mode, the tech comes and resets to ON position or replace it.

[bobcocampo]

Any advantage in installing more arresters?

[anonymousstacker]

What about a person who happens to be standing at the base of the pole?

[macknumber]

So if lightning strikes the high voltage line it would not cause loss of power? It would just be sent to ground? This is why sometimes we see lights flicker or power goes out for a second and then quickly returns? Because the power is momentarily sent to ground and then returns to its normal path through the transformer and eventually into our homes?

[SkipFlem]

they should make these for home service panels...(hint, hint)

[macknumber]

So most of the time power is lost in a storm is due to lightning striking the line causing fuse to blow? Tech comes out and replaces fuse and power is restored

Is this the most common cause of power outages due to lightning storms? Obviously if a tree falls on it and makes contact with ground then power is shorted to ground and power is lost that way too....but it seems much more common for lightning to actually strike a line then for a tree to fall on a line...is there any other ways a storm can cause loss of power?

[RizwanKhan_]

i have a question. Air would have higher impedance than the insulator. Shouldn't lightning travel thru the path of least impedance, in this case the insulator, rather than air?

[macknumber]

So whats stopping this device from sending normal power to ground is this material inside it causing it to be an open circuit under normal voltage conditions....because the power still has a path to it when the fuse is not tripped....but this material keeps it an open circuit until a certain voltage occurs opening it and allowing it to travel to ground...and obviously the fuse is there to protect the transformer....

Which leads me to another question....why do transformers blow if they are protected by these fuses? What are main reasons?

[FestiveShitman]

I have one in my room.
i took it from a broken power line

[ctbt]

But how would it know the difference between the two if the lightning arrester is connected to the same portion as the incoming line?

[piuniverse]

😮Ooh Thank you I was just about to go ask chartGPT about this

[haraptenang.]

Yes its actually an lightning arrestor after all

[TechTed]

Why to arrest lighting when you can use the lighting for the lights and distribution just use a vacuum tube for 100 megavolt