Thank you for the very interesting tour with commentary of a place most people would not have the opportunity to see close up like you have shown. It's appreciated.
@@BearsTrains Walking round on that thing. Yikes. Hope your co-workers are conscientious about lock out tag out procedures. What causes the harmonics? I thought harmonics only occurred when one deviated from a sine wave. How is it that they are damped out?
@@Anon54387 The transformer retains residual magnetism and when powered up the residual magnetism adds to the induced magnetism which causes the core to saturate. When the core saturates, the inductance drops down causing an increase in current at the voltage peaks. This causes the input current sine wave to have sharp peaks and associated harmonics. When the current changes direction so that the induced magnetism is the reverse of the residual magnetism, the residual magnetism is reduced. After some time the residual magnetism is reduced down to zero and the input current becomes a lot cleaner. If the current is at a peak when the transformer breaker is opened, the residual magnetism can be quite high. Ideally the transformer should be switched off when the current is zero, but this is difficult to do when mechanical switches are used. Transformers are run as close to magnetic saturation as possible to keep the cost of the steel core down. Even a small amount of residual magnetism will push the core into saturation. This is expected and breaker won't trip even though the current is substantially higher than the normal operating current. allaboutrozan.wordpress.com/2014/01/01/transformer-inrush-current/
It's more dangerous what you do. This stuff is so well looked after and protected it rarely goes wrong. I work with this stuff as well as 230/415v, this EHV is way safer, no deaths in 38 years on EHV, 4 on LV..... take care 👍
Terrifying amount of power! I once had the opportunity to stand partially inside of a 400 Megawatt alternator located in a major dam on the Columbia river in the US, while it was in full operation. I could see the massive rotating armature and the turbine water control system at work only a meter away the sound and vibrations were A very humbling experience.
Now that is bragging rights. My only claim to fame is that the local drivers would let me at the regulator of our electric trains. 16 motors in a six car set, a touch under 3,000 horsepower all up. I was only a kid. Awesome stuff.
Nice, I had a similar experience in a hydro power station (not a dam), we were on a tour and they let us go inside a room where you could see the turbine shaft rotating, the turbine was below the floor and the alternator above the ceiling. It was 60°C in there, we couldn't even touch the railings or you'd get burns, it felt like walking inside an oven
I always loved the sound of the inrush current when a transformer is energized. It's about the only outward indication of the massive amounts of energy moving through the conductors. Retired electrician
I wonder what kind of oil they put inside the transformer. It surely must be oil only for this equipment. I've seen youtubes on what happens when a transformer explodes and all that oil comes pouring out and adds fire to fire like a nuke explosion. YeeeeHahhhhhhhh!!!!
@@craigroberts1670 It’s usually mineral oil as it has high dielectric strength. Transformer oil used to contain PCB’s (Polychlorinated biphenyl) which is carcinogenic, hence it was relaxed with mineral oil. Even vegetable oil can be used.
The sound at 1:51 is exactly the sound I used to hear on foggy mornings cycling past the power lines on my paper round. 6am and no one around just me and those crackling conductors. 1973. Quite scary when I first heard it but next time it happened I realised this was normal. Ahh memories🙂
This is awesome, I've always loved electricity from microcurrent electronics to "Low side is 132KV..." this is always amazing and so interesting... more, need more!!!
3:45 that made me jump, but great video, i always loved the humming of electricity from a substation as a kid and i still often take a walk up to the one up the street from me
Being retired from the industry, I enjoy watching these videos of a job I enjoyed and miss. One point I want to make even if it is a small point is lets call it what it is, an Autotransformer. Still enjoyed it.
We buy and sell transformers of this size and larger on the secondary market around the World. These are amazingly engineered devices. We have a station close to us that is 765,000 volts to 345,000 volts at 60HZ. We purchased and sold an 870 MVA that had a stripped and drained shipping weight of nearly 880,000 lb. Great video - thanks for sharing.
Actually, no. The entire image warps at the start because the camera moves. There isn't a plausible way for magnetic interference to do this. There is a very plausible way for image stabilisation sensors to detect the vibrations passing through the meshed grating floor which it is mounted on and apply stabilisation processing to the image very briefly, before averaging it out and realising that the camera is not actually moving.
The engineers that design this stuff are top notch. No room for error at all. One stupid design fault could cause a huge problem. I've seen high tension wires touch in the wind. It is an awesome sight. You cannot face it. You have to hide. The heat is intense. It's like welding without goggles but much worse. Hats off to those who are brave enough to work around such dangerous equipment. I hope they pay them well.
Wow.. this was a great video. Funny when I saw the video of the transformer being energized, I said to my room mate, "I wouldn't want to be standing there". Later in the video I found out you didn't want to stand there either.
Beautiful, this is an absolutly beast, the big transformers of electric arc furnaces are about 150Mwats, and you can see with your own eyes how much power is this when melts the steel, and this transformer has triple of power. Amazing.
@01:04 weight 306 tons, that is amazing. I owned a 30 foot by 50 foot by 5-foot ocean-going self propelled steel barge with a 35-ton crane and that only weighed 188 tons.... Thank you for the upload
Great video...High voltages have always fascinated me from my school days.I have always wanted to get close to these monsters..never got the chance..This I guess it the closest I can get
Great video, thanks! Takes me back to Uni days. We studied an awful lot of heavy electrical theory. 4.44 and all that. Few practicals, unfortunately. But I did a summer internship at an electromagnet factory, which made up for it. Yeah: don't take your wallet down to the shop floor, your bank cards will be wiped! Again, big stuff, lifting up to 30T.
The engineering behind all the equipment is mind boggling. I'm more of a residential 120/240 guy and play with 12v DC circuitry a lot so I giggle when I see "low voltage at 132,000V" lol
The phone network operators and technicians in my country (The Netherlands) used to have 48V soldering irons with a plug that differed ever so slightly from a normal mains plug (it didn't fit no matter how hard you tried) because those types of sockets used to be everywhere on the phone frames in the old days. Everything above 48V was considered high voltage by them, even though the 48V in the frames could already be deadly (DC, and carrying lots of current). My brother is an electrician now servicing aircraft equipment and teaches me some of the 240V stuff (which is our normal mains voltage) and is glad seeing me treat open connections by measuring them first out of the idea "You can never be sure" (in the case he saw me doing it my dad, who also used to be an electrician had disconnected a particular connection but I still felt a bit iffy about just touching the open ends...). So it differs from profession to profession. We had a fairly recent high voltage grid malfunction in which multiple safety systems that had been bridged for maintenance refused to work as a result and when an arc-flash situation occurred caused a substation to start drawing so much current on a 150 kV distribution line it started to smoke and sag (as if you were looking at a home electronics project going bad due to a short) up to the point that the lines were nearly touching the ground at some points. These sagging lines while still carrying that 150kV sagged down onto the overhead wiring system of our train system, which uses 1500VDC, and even though it disrupted train traffic massively for months on the route affected by the accident, engineers from both sides were keen on learning the problems associated with their field of work. Since they now had to work together because of how the accident had occurred the high voltage grid people were able to see and learn about the destruction it had caused in a 1500VDC system, and the train electricians were asked to join in watching the repairs on the high voltage side and learn about all the things that the massive fault had caused there. If you are interested, this is one of the video's from the arc-flash situation happening, filmed from quite a distance, but you can see the smoking lines. th-cam.com/video/9JKgGESux94/w-d-xo.html Due to all kinds of stray currents that happened due to downed wires in the substation not getting shut down, in several cities the mains voltage in homes shot up to massive peaks way above what's normally allowed (the maximum is 254V I think), seeing voltages over 300V... When the remaining safety system that was operational failed to work when the arc flash happened (it lasted for about 4 minutes) it was the lower voltage substations that were detecting serious problems and cut themselves out to shut things down upstream... Luckily no one got injured and no wildfires started either, even though the train system had seen security system's cabling set on fire along several kilometers, air-gap disconnectors for the train's overhead wires exploded due to arc-over situations to the mast they were mounted on, rail joints to divide rail sections smoked or got on fire...it was absolutely massive and saw a regional disaster alert with the police urging everyone to stay away from the province this happened in.
Fabulous video. What an amazing job you have! I love the noise from the corona. We have some 200kV lines near us. Walking under them on a foggy / wet day is amazing!
I switched schools back in 1999 when I witnessed a guy vaporized into fine dust by the business end of one of those 400kV secondaries in a power plant. I can still smell the ozone scent mixed with burnt pork after all this time. 12V DC is highest voltage I can cope with after being through that.
Awesome! Years ago, I was lucky enough to be allowed to take pictures inside the converter station in Kent, where 270kV DC comes in from France. The guys there said I could go anywhere I liked within the compound except up... wise words! That place crackled and hummed and I kept getting little zaps off the tripod I was using - there was so much energy in the air ⚡️😀
@@mykolapliashechnykov8701 As far as I can remember, they use massive banks of solid state components (maybe thyristors?) and I mean massive! Several big towers of them in a large hall.
@@TupmaniaTurning I think there's a picture of that hall somewhere on the internet, the insulators were so stupidly massive due to how DC behaves different at the same voltages... It was like a gymnastics hall sized up 3 times in all dimensions, full of massive bushings and bus bars...
For info for corona . Air can handle 3KV/mm before it get ionized and in this case, it will be a conductor instead of an insulation, the electrons can move. nothing is always an insulation or dielectric, it is till the max electric stress that can handle , for example high voltage cables are made from XLPE insulation that can handle 23kv/mm
You don't get a corona unless you have moisture in the air. Very dusty maybe a little one, the tracking a cross the insulators is much more common, that's what the crackling noise was,
I used to haul gravel for repairs into the switchyard of an atomic power plant and it stood the hair up all over me when I dumped a load out of the trailer. We always stockpiled in the same place but it still scared me. Thanks for this and I'd leave the phone there too!
Seeing other videos of when things go wrong in your workplace, and the arcs that can jump, it would scare me being near that thing. I live in The Dalles Oregon, and we have The Dam holding back the Columbia River, In the paper it said than the dam sends a million volts about 5 miles away up a hill to the Celilo Converter Station where it's turned into DC to start it's trip to California. They have all kinds of your gizmos around the insulators hooked up to the lines headed south. Keith L.
I am 64 and for as long as I can remember I’ve been terrified of those places, I can’t physically drive a car past one because of the terror. I was fascinated but freaking out watching that. The electrical humming made me start to panic. I blame my Father (who was an Electrician) telling horror stories he’d seen in his career and the public information films shown in the UK that were graphic and shows what happens when kids play on electrical equipment 🤯 Oh, and guess what my Maiden name was? CABLE!! 😂
My brother was taught this in his training to become an electrician whenever someone brought up being scared to switch on an electrical system he or she had just built, along with being scared to touch the wires: "Good, you need to be afraid, it means you respect the power electricity has. The day you stop paying electricity the respect it deserves is the day it'll kill you." As for some of those public safety campaigns, I didn't live in the UK so I never saw them except for TH-cam, but oof, government campaigns regarding that did not fool around being right on the nose with conveying the message...
Imagine having created the first of this kind of size transformer like 50 to 100 years ago and energising it, not knowing yet what to expect. I would be like 100m away with fingers in my ears, and after its live i wouldn’t dare to get near lol 😂
My scientific director once told me a story from his own postdoc years. Guys were testing a large transformer they have built and wanted to see what happens if the secondary winding is shorted. The power source was a ~6 MW ship diesel generator. Transformer survived just fine, however, some perfectionist decided to coil the generator cable neatly before the experiment. The moment transformer was shorted, the cable uncoiled and lashed the people nearby, resulting in bruised ribs and one broken leg. That was in early 50s, soviet union.
apparently, the loud initial sound of the transformer has to do with the fact that the sudden inrush magnetizes the core, which causes the transformer to become magnetically saturated until the alternating current has a chance to demagnetize it.
3:44 holy cow that sounds terrifying! Why it makes this sound? Is it something like what happens with a Tesla coil? EDIT: I think I found the answer, not sure if it's correct or not: "The alternation current that flows through an electrical transformer’s coils has a magnetic effect on its iron core. It causes the core to expand and contract, resulting in a humming sound." Now that's even more terrifying, a huge chunk of metal vibrating under a massive power.
![NONT TANONT - คลั่งเธอ (Dopamine) [Official MV]](http://i.ytimg.com/vi/imr2dwueUxs/mqdefault.jpg)
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And now we all know exactly what "do not touch this" sounds like.
@@fvckyoutubescensorshipandt2718 My man!
The sooner all that rubbish is shut down the better off society will be.👍👍👍👍👍👍
been using adblocker since 2OO6
MMMMMMMMMMMMMMMMMMMMMMMMMMMM
Being around these machines while they’re energized as always made my heart speed up, you can really feel the power.
Thank you for the very interesting tour with commentary of a place most people would not have the opportunity to see close up like you have shown. It's appreciated.
No worries David.
@@BearsTrains Walking round on that thing. Yikes. Hope your co-workers are conscientious about lock out tag out procedures. What causes the harmonics? I thought harmonics only occurred when one deviated from a sine wave. How is it that they are damped out?
@@Anon54387 The transformer retains residual magnetism and when powered up the residual magnetism adds to the induced magnetism which causes the core to saturate. When the core saturates, the inductance drops down causing an increase in current at the voltage peaks. This causes the input current sine wave to have sharp peaks and associated harmonics.
When the current changes direction so that the induced magnetism is the reverse of the residual magnetism, the residual magnetism is reduced. After some time the residual magnetism is reduced down to zero and the input current becomes a lot cleaner.
If the current is at a peak when the transformer breaker is opened, the residual magnetism can be quite high. Ideally the transformer should be switched off when the current is zero, but this is difficult to do when mechanical switches are used.
Transformers are run as close to magnetic saturation as possible to keep the cost of the steel core down. Even a small amount of residual magnetism will push the core into saturation. This is expected and breaker won't trip even though the current is substantially higher than the normal operating current.
allaboutrozan.wordpress.com/2014/01/01/transformer-inrush-current/
@@BearsTrains Сбоку в кадр попали выводы третьей обмотки.Скорее всего 35КВ.
Master electrician here. 33 years experience. Total respect for you high voltage guys.
It's more dangerous what you do. This stuff is so well looked after and protected it rarely goes wrong. I work with this stuff as well as 230/415v, this EHV is way safer, no deaths in 38 years on EHV, 4 on LV..... take care 👍
@davidsoulsby1102 and you can hear it! Corona. LV when it bite it is too late. Have experience in both. EHV safer.
"Low voltage side - 132,000 volts" :)
MrZedblade yes, my idea of low voltage is one that doesn't hurt.
Well, everything under 1kV is considered "low voltage"
@@TheTrueFreeStyle Not everywhere. US NEC is 600V max for low voltage, but "low voltage" under limited energy is 30V or less.
@@Joshie2256 2014/2017 NEC changed to 1000V... www.ecmag.com/section/codes-standards/general-installation-requirements-part-xxxi
Yea, that is kind of ironic/funny.
Terrifying amount of power! I once had the opportunity to stand partially inside
of a 400 Megawatt alternator located in a major dam on the Columbia river in the
US, while it was in full operation. I could see the massive rotating armature and
the turbine water control system at work only a meter away the sound and vibrations
were A very humbling experience.
Now that is bragging rights. My only claim to fame is that the local drivers would let me at the regulator of our electric trains. 16 motors in a six car set, a touch under 3,000 horsepower all up. I was only a kid. Awesome stuff.
Nice, I had a similar experience in a hydro power station (not a dam), we were on a tour and they let us go inside a room where you could see the turbine shaft rotating, the turbine was below the floor and the alternator above the ceiling. It was 60°C in there, we couldn't even touch the railings or you'd get burns, it felt like walking inside an oven
@ 1:25 clunk "oohhh" "Bumped my head" is what got the thumbs up from me , well done , I do the same all the time ... lol .
Ahh the sound of hardhat on pipe xD
and we know he didn't bump his head on the live power lines, that would've sounded quite different.
Thank you for this in depth tour of this magnificent piece of machinery. Just amazing!
If I ever woke up in such a switch yard you would find me clutching the ground and calling for my mommy.
My heart rate increased just watching this. I'm pretty sure I wouldn't have time to call mum due to the cardiac arrest.
Thanks for taking the trouble to record and upload this. Its not often that we see 132kV described as low-voltage! That earns a thumbs-up.
1:51: farting at home
3:44: farting at school
xD
Ахахахаххах, лол
Funnily, I farted when I liked your comment
I always loved the sound of the inrush current when a transformer is energized. It's about the only outward indication of the massive amounts of energy moving through the conductors.
Retired electrician
I like electricity.
I wonder what kind of oil they put inside the transformer. It surely must be oil only for this equipment. I've seen youtubes on what happens when a transformer explodes and all that oil comes pouring out and adds fire to fire like a nuke explosion. YeeeeHahhhhhhhh!!!!
Yes me too, and the smell of Ozone, it smells like victory!
@@craigroberts1670 It’s usually mineral oil as it has high dielectric strength. Transformer oil used to contain PCB’s (Polychlorinated biphenyl) which is carcinogenic, hence it was relaxed with mineral oil. Even vegetable oil can be used.
I hate in rush current because it typically clears fuses in my line of work lol
Nice sound of the inrush current. Great video.
The sound at 1:51 is exactly the sound I used to hear on foggy mornings cycling past the power lines on my paper round. 6am and no one around just me and those crackling conductors. 1973. Quite scary when I first heard it but next time it happened I realised this was normal. Ahh memories🙂
This is awesome, I've always loved electricity from microcurrent electronics to "Low side is 132KV..." this is always amazing and so interesting... more, need more!!!
3:45 that made me jump, but great video, i always loved the humming of electricity from a substation as a kid and i still often take a walk up to the one up the street from me
The wonderful, satisfying sound of pure power.
Being retired from the industry, I enjoy watching these videos of a job I enjoyed and miss. One point I want to make even if it is a small point is lets call it what it is, an Autotransformer. Still enjoyed it.
Love how you add in all the tech specs
I feel empowered. this transformer has a lot of potential...
Revolting. ⚡
Contrary to popular belief, Corona discharge is NOT the activity that plagues us the morning after Cinco De Mayo.
I always thought that was Montezumas revenge!
I could see that. . . at night!
indeed corona is a virus hahaha
@@BearsTrains noval corona virus 19..
Ha ha ha
Well 2020 happened unfortunately
We buy and sell transformers of this size and larger on the secondary market around the World. These are amazingly engineered devices. We have a station close to us that is 765,000 volts to 345,000 volts at 60HZ. We purchased and sold an 870 MVA that had a stripped and drained shipping weight of nearly 880,000 lb. Great video - thanks for sharing.
3:44 - Camera lens focus system was disturbed by the magnetic surge of the inrush current.
Well spotted.
@Liam Yes, but my guess (MSc power e here) would be the strong magnetic fields of the nearby bus bars feeding the transformer.
You must have REALLY good eyes because i watched it several times and couldn’t see any distortion at all
@@EphemeralProductions Hi there, try to look on metallic structures on the left side...
Actually, no. The entire image warps at the start because the camera moves. There isn't a plausible way for magnetic interference to do this. There is a very plausible way for image stabilisation sensors to detect the vibrations passing through the meshed grating floor which it is mounted on and apply stabilisation processing to the image very briefly, before averaging it out and realising that the camera is not actually moving.
I was falling asleep while watching this video and then the transformer turned and i nearly jumped out of my skin😅
That 50Hz sound brought a tear to my eye. Beautiful.
Glad to know I'm not the only one.
thx for posting. That sound scared the crap out of me! I had my headphones on too high.
Hahahhahhaha... What a shocker!
2:59 free screwdriver! ;)
The engineers that design this stuff are top notch. No room for error at all. One stupid design fault could cause a huge problem. I've seen high tension wires touch in the wind. It is an awesome sight. You cannot face it. You have to hide. The heat is intense. It's like welding without goggles but much worse. Hats off to those who are brave enough to work around such dangerous equipment. I hope they pay them well.
Thank you for the captions for those who know squat how this works!❤️Very informative!
3:45 - the world's most expenesive analog synth.
Nikola Tesla would be proud of his inventions and innovations.
Thank you for the video -
... was very interesting to see such a transformer working!
3:45 you can see the camera image distortion or the inrush current that creates spike of the electromagnetic field. good stuff. Thanks
I recommend hearing this on subwoofers, it shakes your room just like it shaked the camera
3:45 always nice to hear, we only have 110kV/21kV Transformators but the sound is still amazing
Thank you for that walkthrough! Very interesting.
I recently got to tour a transmission substation and it’s absolutely mind blowing to think about the energy flowing through a facility like that
yep, when it gets out of control, it makes a big mess
Wow.. this was a great video. Funny when I saw the video of the transformer being energized, I said to my room mate, "I wouldn't want to be standing there". Later in the video I found out you didn't want to stand there either.
That’s a baby. The 600mva Siemens are the beasts!
Beautiful, this is an absolutly beast, the big transformers of electric arc furnaces are about 150Mwats, and you can see with your own eyes how much power is this when melts the steel, and this transformer has triple of power.
Amazing.
@01:04 weight 306 tons, that is amazing. I owned a 30 foot by 50 foot by 5-foot ocean-going self propelled steel barge with a 35-ton crane and that only weighed 188 tons.... Thank you for the upload
You are quite welcome
Whoa! Very interesting and informative video. I cannot imagine standing on that transformer. Thanks very much for sharing this (4 years later).
Thank you for this. Now i will search for big transformer construction & see if i can see the insides :D
great vid dave. very educational and loving it. electrical engineering was always my guilty pleasure.
The moment when my pfp is an electrical engineer💀
Thanks for the tour. Great video.
Great video...High voltages have always fascinated me from my school days.I have always wanted to get close to these monsters..never got the chance..This I guess it the closest I can get
Love the 50 Hz hum! Feel the power!
Doesn't the transformer have any USB ports so you can charge your phone or something?
Well, I suppose I could plug a USB adaptor into the power outlet
Worlds fastest charger
You could make a glass cap capacitive dropper of you knew what you were doing 😁
You could tap one from the Auxiliary transformer with a 415 to 240 volt panel transformer and plug a USB charger in that way :)
that'd fry even your soul if you tried to do that
Thanks for taking the time to show this mighty transformer! Sounds very nice!
Loved the sound of startup
Pretty fascinating. This must be 50 hz current. I'm a musician and the hum is a lower pitch than the US 60 hz hum.
3:43 you can see the picture wabbeling as the magnetic field build up :-o
1:55 me: it’s corona time * dancing well corona discharge plays in the background and the person who’s dancing is holding corona beer*
yes
while having the corona virus
This is amazing!! And thanks for the tour, it was very interesting!!!
Absolutely terrifying inrush current. More please!
like a good work of art
Very intimidating to the uneducated eye 😵... thanks for sharing your video 🤙🤙👍👍
Transformers, making life possible
500KV switch yard is a good place to stay away from but can put on quite a show!
Best power chord ever!
A very interesting video, thanks for sharing.
This is so soothing
60hz
Gran Trabajo, gracias por mostrar lo que hacen, así tambien podemos apreciar lo que otros hacen, tal como nosotros. Felicitaciones. Chile
dam that monsters loud haha nearly took my ears out wearing headphones
I find this very interesting, thanks for uploading this video
That was neat, thanks for the tour.
Thanks a lot for this quick tour !
Great video, thanks! Takes me back to Uni days. We studied an awful lot of heavy electrical theory. 4.44 and all that. Few practicals, unfortunately. But I did a summer internship at an electromagnet factory, which made up for it. Yeah: don't take your wallet down to the shop floor, your bank cards will be wiped! Again, big stuff, lifting up to 30T.
Love that magnetostriction sound 👌
The engineering behind all the equipment is mind boggling. I'm more of a residential 120/240 guy and play with 12v DC circuitry a lot so I giggle when I see "low voltage at 132,000V" lol
The phone network operators and technicians in my country (The Netherlands) used to have 48V soldering irons with a plug that differed ever so slightly from a normal mains plug (it didn't fit no matter how hard you tried) because those types of sockets used to be everywhere on the phone frames in the old days.
Everything above 48V was considered high voltage by them, even though the 48V in the frames could already be deadly (DC, and carrying lots of current).
My brother is an electrician now servicing aircraft equipment and teaches me some of the 240V stuff (which is our normal mains voltage) and is glad seeing me treat open connections by measuring them first out of the idea "You can never be sure" (in the case he saw me doing it my dad, who also used to be an electrician had disconnected a particular connection but I still felt a bit iffy about just touching the open ends...).
So it differs from profession to profession.
We had a fairly recent high voltage grid malfunction in which multiple safety systems that had been bridged for maintenance refused to work as a result and when an arc-flash situation occurred caused a substation to start drawing so much current on a 150 kV distribution line it started to smoke and sag (as if you were looking at a home electronics project going bad due to a short) up to the point that the lines were nearly touching the ground at some points.
These sagging lines while still carrying that 150kV sagged down onto the overhead wiring system of our train system, which uses 1500VDC, and even though it disrupted train traffic massively for months on the route affected by the accident, engineers from both sides were keen on learning the problems associated with their field of work.
Since they now had to work together because of how the accident had occurred the high voltage grid people were able to see and learn about the destruction it had caused in a 1500VDC system, and the train electricians were asked to join in watching the repairs on the high voltage side and learn about all the things that the massive fault had caused there.
If you are interested, this is one of the video's from the arc-flash situation happening, filmed from quite a distance, but you can see the smoking lines.
th-cam.com/video/9JKgGESux94/w-d-xo.html
Due to all kinds of stray currents that happened due to downed wires in the substation not getting shut down, in several cities the mains voltage in homes shot up to massive peaks way above what's normally allowed (the maximum is 254V I think), seeing voltages over 300V...
When the remaining safety system that was operational failed to work when the arc flash happened (it lasted for about 4 minutes) it was the lower voltage substations that were detecting serious problems and cut themselves out to shut things down upstream...
Luckily no one got injured and no wildfires started either, even though the train system had seen security system's cabling set on fire along several kilometers, air-gap disconnectors for the train's overhead wires exploded due to arc-over situations to the mast they were mounted on, rail joints to divide rail sections smoked or got on fire...it was absolutely massive and saw a regional disaster alert with the police urging everyone to stay away from the province this happened in.
Very interesting video.
Thank you
Fabulous video. What an amazing job you have! I love the noise from the corona. We have some 200kV lines near us. Walking under them on a foggy / wet day is amazing!
Damm those inrush currents are so comforting. And how amazing that those harmonics are trapped using an LC filter or a delta connected xmer I suppose.
I switched schools back in 1999 when I witnessed a guy vaporized into fine dust by the business end of one of those 400kV secondaries in a power plant. I can still smell the ozone scent mixed with burnt pork after all this time. 12V DC is highest voltage I can cope with after being through that.
Yuk. On day one at this place they say "One flash, you're ash"
Very informative. Thanks for posting this.
Awesome! Years ago, I was lucky enough to be allowed to take pictures inside the converter station in Kent, where 270kV DC comes in from France. The guys there said I could go anywhere I liked within the compound except up... wise words! That place crackled and hummed and I kept getting little zaps off the tripod I was using - there was so much energy in the air ⚡️😀
How do they do the conversion? DC motors or static (semiconductor) inverters?
@@mykolapliashechnykov8701 As far as I can remember, they use massive banks of solid state components (maybe thyristors?) and I mean massive! Several big towers of them in a large hall.
@@TupmaniaTurning I think there's a picture of that hall somewhere on the internet, the insulators were so stupidly massive due to how DC behaves different at the same voltages... It was like a gymnastics hall sized up 3 times in all dimensions, full of massive bushings and bus bars...
@@Dutch3DMaster Thanks for the info. I did peer into the hall through a window and it was awesome to see!
Looks like a brilliant location to fly a kite.
It'd be kinda hard tho
Awesome video. I would feel pretty scared walking around in a switch yard, though. The amount of power is just otherworldly.
That was awesome! Thanks for sharing.
For info for corona . Air can handle 3KV/mm before it get ionized and in this case, it will be a conductor instead of an insulation, the electrons can move. nothing is always an insulation or dielectric, it is till the max electric stress that can handle , for example high voltage cables are made from XLPE insulation that can handle 23kv/mm
You don't get a corona unless you have moisture in the air. Very dusty maybe a little one, the tracking a cross the insulators is much more common, that's what the crackling noise was,
Thanks for sharing all very interesting as an election
I used to haul gravel for repairs into the switchyard of an atomic power plant and it stood the hair up all over me when I dumped a load out of the trailer. We always stockpiled in the same place but it still scared me. Thanks for this and I'd leave the phone there too!
No worries Lewie. Thanks
That. Was. Beautiful. Thanks for taking the time to record and post this!
Seeing other videos of when things go wrong in your workplace, and the arcs that can jump, it would scare me being near that thing. I live in The Dalles Oregon, and we have The Dam holding back the Columbia River, In the paper it said than the dam sends a million volts about 5 miles away up a hill to the Celilo Converter Station where it's turned into DC to start it's trip to California. They have all kinds of your gizmos around the insulators hooked up to the lines headed south. Keith L.
that was a cool tour. sorry you bumped your head though.. thats one really cool job..thanks for the post..
I am 64 and for as long as I can remember I’ve been terrified of those places, I can’t physically drive a car past one because of the terror. I was fascinated but freaking out watching that. The electrical humming made me start to panic. I blame my Father (who was an Electrician) telling horror stories he’d seen in his career and the public information films shown in the UK that were graphic and shows what happens when kids play on electrical equipment 🤯
Oh, and guess what my Maiden name was? CABLE!! 😂
My brother was taught this in his training to become an electrician whenever someone brought up being scared to switch on an electrical system he or she had just built, along with being scared to touch the wires: "Good, you need to be afraid, it means you respect the power electricity has. The day you stop paying electricity the respect it deserves is the day it'll kill you."
As for some of those public safety campaigns, I didn't live in the UK so I never saw them except for TH-cam, but oof, government campaigns regarding that did not fool around being right on the nose with conveying the message...
1:50 ok this guy not only know what is doing, is brave too.
Great video
Imagine having created the first of this kind of size transformer like 50 to 100 years ago and energising it, not knowing yet what to expect. I would be like 100m away with fingers in my ears, and after its live i wouldn’t dare to get near lol 😂
My scientific director once told me a story from his own postdoc years. Guys were testing a large transformer they have built and wanted to see what happens if the secondary winding is shorted. The power source was a ~6 MW ship diesel generator. Transformer survived just fine, however, some perfectionist decided to coil the generator cable neatly before the experiment. The moment transformer was shorted, the cable uncoiled and lashed the people nearby, resulting in bruised ribs and one broken leg.
That was in early 50s, soviet union.
apparently, the loud initial sound of the transformer has to do with the fact that the sudden inrush magnetizes the core, which causes the transformer to become magnetically saturated until the alternating current has a chance to demagnetize it.
This video has a lot of potential 😲
3:45 - Instantly liked and added to my favourites :-D
I felt that head bump!
Thanks for the added info! Truthfully this as close as I want to get to this stuff! Lol
Cool informative video. I saved the link.
The AIS to GIS migration for high-efficiency of switchgear systems
Thanks for making the video,great job.
Thank you Adelmo
3:44 holy cow that sounds terrifying! Why it makes this sound? Is it something like what happens with a Tesla coil?
EDIT: I think I found the answer, not sure if it's correct or not: "The alternation current that flows through an electrical transformer’s coils has a magnetic effect on its iron core. It causes the core to expand and contract, resulting in a humming sound."
Now that's even more terrifying, a huge chunk of metal vibrating under a massive power.
magnetostriction
Great main frame. ...
Very cool! Thanks.
Fascinating