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Main Forums => The Roundtable => Topic started by: 230RN on April 11, 2019, 06:53:46 AM

Title: Explosive splicing of high-tension wires in power distribution.
Post by: 230RN on April 11, 2019, 06:53:46 AM

I know they do explosive cladding and welding of (even dissimilar) metals, but this is a new one on me:  

Coupling connectors and conductors together in power distribution work using a surrounding sleeve of explosives (detonating cord) to crimp the ends together.

https://youtu.be/KuMkQxdn7OA (2:30)

More details on nitty-gritty technique and advantages, eg., you can pull the explosive sleeves through block and tackle equipment before setting them off.  (See 2:10):

https://youtu.be/0SbZ1wlN-mY  (3:33)
  
I learn something new every day.  But sometimes that's not enough anyhow.

Terry, 230RN

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: MechAg94 on April 11, 2019, 08:35:21 AM

Cool.  I guess it is also easier to install a sleeve of explosive than use tools up that high to mechanically do it.

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: 230RN on April 11, 2019, 08:56:22 AM

^ They mentioned that in the second video and had a shot of a guy up in the lift pumping away on a hydraulic crimper.

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: never_retreat on April 12, 2019, 10:17:25 PM

Did some dead end lugs on a 750kv line years ago. Something like 75 crimps with a 50 ton press. Dam things didn't even fit in the bed of a full size pick up.

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: 230RN on April 13, 2019, 01:00:36 AM

So how do they handle "dead ending?"  It sounded like it was more than just hanging the last "loop" of wire on the last tower or pylon.  What's special about it, if anything?

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: Sindawe on April 13, 2019, 01:43:58 PM

Quote

I learn something new every day.  But sometimes that's not enough anyhow.

If one has to have an addiction, knowledge & wisdom are tolerable things be to addicted to.

(https://i.imgur.com/CeUeaCp.jpg)

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: 230RN on April 13, 2019, 03:31:49 PM

^ I don't get it.  Teach me.  If it's a gamer thing, it's beyond my ken.  https://i.imgur.com/CeUeaCp.jpg yields no useful clues.

Quote from: 230RN on April 13, 2019, 01:00:36 AM

So how do they handle "dead ending?"  It sounded like it was more than just hanging the last "loop" of wire on the last tower or pylon.  What's special about it, if anything?

My guess woud be that they can't just tie the last electrified loop to a pylon, they have to have another pylon beyond that with unelectrified lines to keep the tension on the last powered lines.

How close am I?

Terry

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: Regolith on April 13, 2019, 04:58:49 PM

Quote from: 230RN on April 13, 2019, 03:31:49 PM

^ I don't get it.  Teach me.  If it's a gamer thing, it's beyond my ken.  https://i.imgur.com/CeUeaCp.jpg yields no useful clues.

It's Odin. He traded one of his eyes in return for wisdom.

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: 230RN on April 13, 2019, 06:16:28 PM

Ah, OK.  I guess I knew that at one time.  Thanks.

Title: Re: Explosive splicing of high-tension wires in power distribution.
Post by: never_retreat on April 14, 2019, 07:41:49 PM

Quote from: 230RN on April 13, 2019, 01:00:36 AM

So how do they handle "dead ending?"  It sounded like it was more than just hanging the last "loop" of wire on the last tower or pylon.  What's special about it, if anything?

Essentially a giant bolt on lug that's crimped to the end. It dropped down from the tower and onto the buss bar.