Transformer Welder Part 2c
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- Опубліковано 17 жов 2024
- Part 2c - Getting near the end now
Part 1 - • Transformer Welder Part 1
Part 2a - • Transformer Welder Par...
Part 2b - • Transformer Welder Par...
Part 3 - • Transformer Welder Par...
The transformer tree shown apparently rubbed thru the insulation at the top of the conduit on the right side and began arcing.
It started slowly arcing down the side of the conduit as more of the cabling inside melted and exposed the copper to the metal conduit.
the entire event took around 30 minutes to get about half way down the conduit before it finally burned itself out.
I'm still amazed that the fuses feeding the transformer took 25 minutes to blow and that the power company never shut off the feeder to that transformer bank. They just let it burn.
I definitely wouldn't want to be the ones that need to repair all of that!
Confined to the underground feeder, FD won't touch it until deenenergized. Utility wont touch it until fire is out.
Arc flash is something you dont play with.
That little technicality is going to cause a lot of trouble one day.
@keithjurena9319 I understand both of those situations but there wasn't a real "fire" until after arcing stopped. If the arcing would have been stopped earlier then the damage could have been minimized.
@@jeffbuss3477 insulation was melted off that secondary riser. Still arcing on that grounded metal pipe and not going to stop until that door gets beat open from behind with the first hotstick you can get your hands on since it's facing the field. Take longer to get the outriggers down than it would take me to boom straight up 20 feet open that door.
Listening to someone who knows absolutely nothing with what's going on constantly criticize, and trash talk the experts who are experts, and are more than likely expertly doing there jobs, according to company protocol, which is the way it is dew to a long history with lots of job related serious injuries and fatalities. Being a lineman is an extremely dangerous job. The procedures are from lessons learned in blood.
@mr.shannon6137 no reason to be offensive. No one was suggesting that anyone do anything dangerous. No one said that the linemen needed to go up and unhook it while the sparkler was running.
I'm an industrial electrician that works with 34.5kv, 4160v and 480v. And if I saw that happening in any if my equipment I'm going to shut off the supply to protect what's left to try to minimize impact on production. But that may just be me...
As an old high lineman, the linemen were doing their job. When you have a fault like that between two fuse cutouts, your first priority is life. By cutting power to the whole neighborhood is a potential liability.
@@USMC1984 fair enough.
@@jeffbuss3477 👍 and just for geewhiz those transformers are filled with oil and with arcing like that it is heating up and could “explode” at any second so linemen stay clear and keep everyone else clear. The aluminum conductors that are used will melt pretty quickly and break contact. Although I am surprised the barrel fuse cut out on the cross arm did not blow.
These transformers work off a 12kv ground system. One wire connected to hot wire and other connected to neutral wire equals 12kv. In this case the one fuse cutout failed to open leaving that transformer live and feeding into that circuit. In a 12kv non neutral setup each transformer gets 12 kv from two hot leads and shares power from the fused cutouts. If one of the fused cutouts opens all three transformers will not work.
Two of the main breakers have popped but one still in one transformer still alive.
What kind of transformer configuration is that?
As a licensed master electrician, commercial elec contractor and 2nd generation electrical worker who worked on everything from hand crank gen's to nuclear power stations, There is usually not a way to disconnect the high voltage dist. lines as doing so risks the potenial of taking power from a larger number of other unaffected people, as well as the risk of breaking very high voltage while under heavy load requires specialized fast acting devices usually within an enclosure submerged in dielectric oil. which is as expensive as it sounds. the transformer bank is toast anyway and getting directly under the situation could result in being covered in K's degree flaming oil if one of the transformer pots on the pole were to explode while trying to pull the jack with yes the extending pole thingy otherwise known as a "hot stick" since two of the fuse links had already done their job the remaining circuit was operating from a single phase to ground meaning the secondary was probably only 50% of normal V. the responding crews were probably verifying there was no other issues causing or resulting from the fault, while they waited for the situation to resolve its self, as it did. There is a huge number of factors to consider when responding to a situation like this that a crew must identify and mitigate all while keeping j public safe, try to give some respect to the people who make life posible every hour of every day even when the average guy has packed up the prius and headed to saftey. Their job is a very dangerous and thankless one, when was the last time you heard about a lineman killed during a storm or electrician who died in the line of duty? Feel free to film and enjoy the show, just stay out of the way and let the folks who battle with captive lighting daily do their work.
Well said. People don't understand that high voltage that can source unlimited amounts of. Current can not just be turned off or pull a fuse. It has to just burn up and cool down. They will take care of it and get the lights back on.
@vanharmon2212 Thanks, I usually try not to comment on videos and tend to keep them reserved for the keyboard gangsters of the world who prefer to point out how the man in the fight may stumble without being willing to step into the arena themselves. I understand the average persons perspective and didn't think ol' boy was out of line in thinking it. I had just finished explaining to a friend that of all the fields an individual may persue, where failure is acceptable as a normal occurance while in the "Practice of" the dicipline, hardly anyone to include electrical workers take notice of the technical classes explaining the actions, interactions and fundamentals regarding electricity as we know it, is still listed as "Theory" as in theoretical. Since we are as close to understanding it as we are the other great questions of the universe. "How exactly is a rainbow made? How exactly does a sun set? How exactly does a posi-trac rear-end on a Plymouth work? It just does."YKYK apollogies for being cronically long-winded and poor spelling.
Won't hurt to jerk that last door with an extendo stick. Most of those customers are either out of power already, single phased or low voltage. Any 3 phase loads are burning up equipment. You could burn houses down in this scenario. Don't know about any of yall, but I've opened a few of those flaming shitstorms over the last 45 years.
If you DON'T cut power, might burn the primary down and THEN you got a big ol outage for a bunch of people, not just the customers on that bank.
@dennisgumm7016 I have climbed inside a running crusher at a quary to complete a vibration sensor not come back later. We have all done dumb stuff in a career long enough. I don't know where you run into many 3~ residential services that old, starting to see them occasionally now on bigger and newer, but a 3~should have a properly sized motor starter not relying on power co. Jack's to be protection of secondary equipment 😉 trying to spread the love and knowledge
That's job security 😂
Nice! A sit and wait situation because it will eventually resolve itself and not smoke ya in the process !😊
interesting that two of the primary breakers were already tripped (hanging down) at the start of the video. The third one held, and eventually a piece of the feed wire that just melted in half became the "fuse". That is when the energy was cut, the copper cooled, and the fire was just a residual plastic insulation fire. If the crew was there, they could have just taken their long pole and tripped the third breaker.
fuses not breakers inside those. and only linemen are qualified to shut off the power. there could be 7000 v or more on the primaries.
It wont trip if the current is too low. Just because there is a fire doesnt mean is a direct short.
@rtel123 that part of the video was actually the last part of the series. Those fuses blew about 20 minutes into the event. And the wire that burned wasn't the feeder wire to the transformer. The feeder wires go from the top of the fuses to the overhead lines. The wire that burned was going between the transformers. Tbh I'm not really sure what it's purpose is. Maybe a center tap neutral line for the 3 phases?
@@jeffbuss3477 secondary buss wire. Delta hookups share coils on adjacent transformers through their buss. Wye hook ups are separate phase to ground connections. Primary is high voltage - low amps. Secondary side of the coil is low voltage - high amps. Amperage is where the work gets done. And the damage occurs.
@@rtel123 have to have 2 phases energized to have a phase to phase fault, 2 doors open .... SHAZAAM !! Phase to phase fault disappears and remaining energized phase just goes on about it's merry way.
Cool video footage. I assume you lost power too due to this
@heroknaderi actually no, not this time. 2 weeks before this that same transformer bank arced and we lost power for a few seconds. It seems that transformer bank is pretty fragile.
This is a good example of carbon tracking
@liamtheinventor1522 important to look for if it happen on the primary side at the K+ v range. Most likely cut thew jacket on wire at sharp edge of riged conduit stack. Don't forget to take a bushing with you. Lol
Standing that close is insane
It looks lethal!
Call dispatch and tell them to open the #6 Line
We had 2 lines that fed our substation
# 5 and # 6
When we had lines down they would call on their two way radio to the main command center and they would remotely open the main line and 10 miles of lines would be disconnected.
The transformer has a fuse
The feed might be 7200 volts to the substation, or 30,000 volts to the substation.
The transformer is fine. It just burnt open the fuse.
The mains are still on
Why is there a 3 phase transformer pad on a residential pole ?
Who is using all that power ?
@ocsrc yes the generating station has the ability to control the major" transmission" lines and some smaller ones at critical locations but not usually the "distribution" lines of the street level grid. Even increase or decrease the actual voltage on the line. But surprise there are more switches in a 1st gen tesla than your local electrical providers system. Not everything is ready to be handed over to AI to manage. So tell your sons and daughters that forgoing a college dept. For an apprenticeship for a couple years and 6 figure +there on dosent make you stupid or a redneck. The redneck makes you feel proud to have all paid off possessions.
Ha ha ha ha thanks for staying with all of it ha ha ha ha I just shared it to a power engineer group
That's a 4hr job for a team to replace the pole, rack, and pots. Linemen are insanely fast at work like this and they train constantly as groups so that they all know what to do, and when. Its poetry in motion watching storm teams or emergency repair teams work under the gun. It doesn't even phase them.
You got one hell of a crew that can replace and build THAT structure in 4 hours. I'll hire them and start my own contracting firm.
THATS EXPENSIVE!
looks like the 2 cut off on the left are open and the one burning is still shut
That pipe had more than 80% fill
That one cutout didn't trip.
2 of the fuses have opened, but the one on the right has not.
Did you get any video of them doing the repairs?
@shockingguy they haven't done the repairs yet. The utility and the business are arguing over whose responsibility it is to pay for the repairs. In the meantime the business has been running on a backup generator at $1200 per day in diesel fuel.
@@jeffbuss3477
Cheaper to FIX the line and then sue the utility than to run an industrial gen set @1200/day.
@@blaydCA who exactly is going to fix it that doesn't work for the utility in some form or fashion ?? So you can THEN sue them. Your sister's boyfriend's stepdad's golf buddy's neighbor ???????? I was talking to you awhile last night on another thread. You said a mouthful at the end when you said you were allergic to heights and like being on terra firma. You are obviously a grunt at best.
@@dennisgumm7016
I'm a retired contractor that knows that simple math on a dinner napkin would show me that getting the destroyed line fixed as rapidly as possible is most likely going to be cheaper than pouring $1200/day worth of diesel into a genset
If it was a natural gas genset then maybe they could diddle around for a few weeks.
It's NOT like the old days where dyed diesel was dirt cheap and big operations could just disconnect from the grid if the utility wasn't competitively priced .
@@blaydCA you can't just park in front of a pole and start working on energized apparatus without a $hitload of papers being signed and guys with briefcases etc, etc. Government money subsidies plus being strategic infrastructure makes it a Federal jurisdiction so they can use a number of 3 letter agencies blow your life up in ways you probably wouldn't want to go thru uneccessarily. You go find me a contractor that will go change your transformers out and start fiddling with energized conductors without the utility's consent or proper insurance bonds, union agreements, various state and local permits, yadda yadda yadda.....and I'll show you a bunch of guys getting ready to go to jail, if not prison. You want to sue a power company ?? You'll get paid triple damages, if they sue you, they can come up with any wildass number they can come up with and then triple that if you lose. Not to mention they have buildings full of lawyers so you better have deep pockets tough guy.
They don't make money if meters aren't spinning. Power company pays for everything up to the meter, customer owned after that. If that job is on hold, there is some sort of equipment issue. Had to order transformers or something special or.......That circuit and customers will get fixed asap. Meters must spin. They'll figure out the money later. That's what all the lawyers are for.
Those risers are obviously industrial and having 4/0 copper secondary buss blowed apart on that bank means, there is liable to be damaged equipment in the buildings. It's hard telling not knowing and all, and no disrespect intended because you have a good rudimentary understanding of electrical distribution....but you say some pretty dumb shit when you start making shit up. Stay in your lane.
Well ,There's your problem.🤪
If the electric company was not there, they could not shut it off.
They don’t isolate it because it would kill the power to lots more properties. It’s safer to let it burn itself out, open and close parts of the ring to keep supplies on, and work on it afterwards
@anthonybarra2391 I canteen the reasoning there but at what point is it letting it go on too long? It was half way down the pipe before it finally went out. What happens if it goes underground before finally burning out? I honestly don't know. Maybe it would be ok. Maybe it would be more catastrophic.
@@jeffbuss3477
The entire line that's on fire has to be REPLACED.
It's compromised and fused together.
New cable and conduit and connectors.
If you DON'T isolate that bank you run the risk of burning the primary down and killing the entire circuit which could be 100s of customers. Plus the wire sags as it heats up which is good for burning down secondaries and communications, starting fires in trees. Possible house fires. Plus having to repair primary conductors. Turn an 8 hour job into a couple days project plus a shitload more customers off.
@@dennisgumm7016
Which is WHY primaries have reclosers (circuit breaker that resets 3 times before staying OFF) to protect from faults of this nature.
@@blaydCA And they apparently aren't working on that day. I'm an A card carrying IBEW Journeyman lineman with a 45 year pin on my ballcap. Electricity does funny $hit sometimes. I know you don't sit around and watch it burn to the ground. Maybe some of those BA ticket utility hands might, but not how we do it in construction.
The secondary lines over loaded
Back when they used Metal conduit