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High Voltage Electrical Wire Fire - Northfield, MN



Uploaded by: bellemorgan
Video Description:
Newly installed high voltage electrical transmission line catches fire and explodes just outside of sub-station. Northfield, Minnesota June 28, 2007


Tags for this video: electrical explosion fire

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This was multiple ... ( 5 months ago by RyuDarragh)
This was multiple shots from an ArcStop canon that uses an explosive charge to fire semi conductive flakes into an arc so that the arc will flow through the powder for a fraction of a second. The arc is extinguished becuase the powder conducts only while *hot* and the force of the blast blows it out quickly. That was not a fire, but an arc over at a junction between a 69KV line and a branch circuit. The bit at the junction you see is a disconnector.
Oh, aasmith48161, ... ( 5 months ago by RyuDarragh)
Oh, aasmith48161, that's a manual disconnector at a junction. The arc indicates a failure of one or the other phase disconnectors. If it were the breaker that had failed, they could just open the lines altogether. See the metal rods on the sides of the pole? They're usually set in pairs so they can disconnect either down stream load. See them all over PA where I live. For more fun, do a search for "13Kv" and look at one where the 34KV lines shorted into the local 13KV grid. Much (expensive) fun.
holy crap the ... ( 4 months ago by jerkorna4)
holy crap the arcing hit the other powerline dude thats bad
An insulator nearby ... ( 4 months ago by RODALCO2007)
An insulator nearby the arc could have carbonised and became conductive.
The metal operating handles are usually earthed to an earth bank. This could have caused a phase to earth flashover and trip of the feeder. It looks like 69 kV or higher voltage to me.
maybe one of the ... ( 4 months ago by form109)
maybe one of the switches is open slightly allowing arcing.
Awesome explosion. ( 3 months ago by Knifymoloko)
Awesome explosion.
lol teabag them. ( 3 months ago by JW69Stryker)
lol teabag them.
LOL HADOKEN!! ( 3 months ago by JW69Stryker)
LOL HADOKEN!!
Don't just stand ... ( 2 months ago by MIKEPREAMP)
Don't just stand there! Call 911!
Woot MN. That was ... ( 2 months ago by LRMNmeyer)
Woot MN. That was cool, must have been epic to see it in person.
that mustve sucked ( 2 months ago by j6282)
that mustve sucked
I dont think i want ... ( 2 months ago by dennismanvids)
I dont think i want to write out the check for the repair bill! What would one of these switches cost brand new? anyway great capture!!
What is the ... ( 2 months ago by BenHutchinson1)
What is the advantage of having the arc flow through a conductive powder?
It forces the arc ... ( 2 months ago by RyuDarragh)
It forces the arc to get *longer* because it has to jump from speck to speck (it's more like metallic confetti). A longer arc is easier to blow out. It's fired from something that looks like a mortar as you do *not* want to be near it when it hits the arc :P
By "not want to be ... ( 2 months ago by BenHutchinson1)
By "not want to be near it", are you refering to the metalic power launcher? or are you refering to the blower that blows air on the arc afterwards to blow the arc out? And by not wanting to be near it, do you mean because it makes a VERY LOUD noise? And in this video it looked like there wasn't any safety device. In the end the arc rose up to the line of the other phase, and on contact created a short circuit, and I think the smoke and sparks is from melting and vaporizing metal wires.
The arc happens ... ( 1 month ago by RyuDarragh)
The arc happens because the lines are unbalanced, but the reasons you don't want to be near the arc supressor mortar are more than the ones you hit on (loud and very hot.. it's an *explosion*, after all :P), but because that column is also *conductive*. You notice how thw whole column glowed pink and blue? You might get fried by the stray voltage arcing to ground. The arc stop also does double duty both diverting voltage and blowing the arc out.
Oh, forgot to ... ( 1 month ago by RyuDarragh)
Oh, forgot to mention, look at the frame at 59:30.1. You can see the simple spark filled column shooting up onto the arc from below.
I might be mistaken ... ( 1 month ago by BenHutchinson1)
I might be mistaken, but I think what is happening here is the arc rises until it touches another phase, then it shorts the phase creating a LOUD bang (like when I short the charged capacitor in my camera flash with a screwdriver). Then at the same instant a fuse or breaker up the line trips, which stops the arc instantly. The sparks you see are chips of molten metal blasted off the wires by the force of the electric explosion from the short circuit.
I do not believe ... ( 1 month ago by BenHutchinson1)
I do not believe the explosion is an arc suppression cannon. As I already said I believe it is an electrical explosion from the short circuit when the arc crosses the phases. And I also do not believe the sparks seen flying are from the metal "confetti" from the arc suppression cannon. I believe that the electrical explosion already had enough heat and force to accomplish this by melting and blasting away part of the wires or other involved conductors.
When you say "near" ... ( 1 month ago by BenHutchinson1)
When you say "near" it, do you mean for example that the guy with the camera here was too "near" it? Because while the explosion would be loud from where he was, he wasn't close enough to get fried (which would have to be right up on the pole near the arc).
I was suprised when ... ( 1 month ago by fengineer08)
I was suprised when it didnt flash between the other phase... but then it did!
i was just waiting ... ( 1 month ago by SodiumCyanide)
i was just waiting for the ionized arc to hit the next phase... then boom!
id walk up to the ... ( 3 weeks ago by buckslanding)
id walk up to the ppole and pull the fuse swich the little pole next to the big pole ans stop it
acually i won,t get ... ( 2 weeks ago by buckslanding)
acually i won,t get killed i do this all the tim i work with a electric co if thers a pole fire ill come out and do that



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