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re: In general, why aren't utilities underground to avoid loss of power?
Posted on 7/8/24 at 8:36 pm to fr33manator
Posted on 7/8/24 at 8:36 pm to fr33manator
I've never seen them dig up anything to repair electric in my neighborhood.
Water? Different story. Twice this past winter and it wasn't even that cold.
Water? Different story. Twice this past winter and it wasn't even that cold.
0
Posted on 7/8/24 at 8:38 pm to Thracken13
quote:
if the Fed Gov won't spend money to improve the infrastructure we have now, they sure as shite wont pay to essentially redo what is already out there.
The govt doesn’t own or operate the grid. It’s almost all privately owned.
Posted on 7/8/24 at 9:49 pm to HubbaBubba
Cost to install and cost to repair when there is a problem. Finding faults underground is a slow process. Not only that, when there is a problem with the overhead lines they can be repaired individually. If only one line has a problem. Even after you find the problem with underground cables all cables on that circuit has to be pulled out instead of just fixing the one line
Posted on 7/8/24 at 10:09 pm to HubbaBubba
We have underground lines in Lake Vista in NOLA. It's nice not to have poles and lines but we lose power as easily as any other neighborhood.
Posted on 7/8/24 at 10:12 pm to lostinbr
quote:
My understanding is that medium-high voltage underground power lines often (usually?) utilize a dielectric oil fill that acts as an additional insulator, helps remove heat, and helps prevent water ingress.
Sounds like I need to look into this. I haven't done any utility work so there may be something I'm not aware of.
You may be confusing this with an oil-filled switch which acts to extinguish the arc of contacts being disconnected. Some switches will use an inert gas like SF6 to reduce high voltage arcing but I'm not sure if they are as prevalent for utilities as the oil-filled stuff. I'll admit my ignorance there though.
Posted on 7/9/24 at 5:57 am to Hopeful Doc
quote:
You gonna do 220?
221, 222 whatever it takes.
Posted on 7/9/24 at 6:18 am to HubbaBubba
Money. Folks would have a conniption fit if they had to pay more for more reliable transmission networks. More and more are being buried though. It will never become the norm. It really makes economic sense in secondary circuits where maintenance is harder, on average, to complete. Main distribution circuits are generally easier to maintain and except in high winds and ice seldom suffer much damage. The lower systems with lots of trees around is where the difference between underground and overhead becomes practical.
Posted on 7/9/24 at 7:54 am to Bucktail1
quote:
It’s all about doing things the easy cheap way in LA
Not only that, Louisiana's weather pattern and location puts these utility poles at virtually no risk to severe weather events that could knock them over and put them out of service. So really no reason to have them buried.
Posted on 7/9/24 at 9:16 am to Jack Daniel
quote:
Heat
What does this mean?
it means that transmission of electricity through lines creates heat, which can be easily dissipated by stringing uninsulated lines in the open air. Maybe the lines are aluminum, which dissipates heat quicker. if the lines are buried, the heat cannot dissipate as easily because they have to be insulated and/or placed in conduit with no air flow.
Posted on 7/9/24 at 9:18 am to Cuz413
quote:JCH?
221, 222 whatever it takes
Posted on 7/9/24 at 9:57 am to piratedude
Posted on 7/9/24 at 10:06 am to bapple
1983 in Saudi Arabia the industrial standard was for power lines to be buried for military purposes. Our incoming 115 kv line was about a mile long, in. a buried oil filled cable. I do not remember a circulating system for cooling but there was a pressure maintaining system.
general plant instrument and power cabling used a lot more copper to keep the temperature down, but another big cost was the requirement to install 35 % spare cabling for maintenance and expansion
Underground can be done if you are very wealthy.
general plant instrument and power cabling used a lot more copper to keep the temperature down, but another big cost was the requirement to install 35 % spare cabling for maintenance and expansion
Underground can be done if you are very wealthy.
Posted on 7/9/24 at 2:39 pm to piratedude
The lines in the air are also insulated
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