1590mcm ACSR 'Falcon'

[rasifone]

Does anyone know where I could get a stress-strain curve for 1590mcm ACSR 'Falcon' cable?
I'm trying to do a manual sag-ten calc for a short tower line and I do not have access to SAG-10 or any other program.
Thanks.

 

[stevenal]

http://www.coldrocks.com/cgi-bin/download.cgi?software/Setup_SpanCheck_1.0.2beta.exe

might help you avoid the manual calcs. Southwire.com should have the conductor data you need.

 

[mc5w]

Also make sure that all of the aluminum wire strands are conducting or your line will overheat - that would throw off your stress strain curve. The only way that the Chamberlin-Harding 345KV line could have sagged into trees on 14 August 2003 is if only 1/2 the wire strands were conducting. This line was only carrying 44% current (about 20% theoretical heat) when it sagged into trees. This set off a chain reaction of overheated lines elsewhere on First Energy's grid leading to the blackout.

There are several ways to assure that ALL the wire strands are conducting:

1. What I use for building wire, both copper and aluminum, is to fan out the wire strands, clean them with #220 silicon carbide abrasive paper, goop them up with joint compound, then recompress with a hose clamp. There are some other issues such as using a round object (screwdriver shaft) to establish a bending radius and cutting off the sharp tips before cleaning. See my website

http://home.earthlink.net/~mc5w

about an hour after I post this. Every industrial machine that I have hooked up with aluminum has been a 100% success story as far as the aluminum wire was concerned.

You can also visit Dr. Jesse Aronstein's website

http://www.inspect-ny.com

. He says that a wire brush is 100% INEFFECTIVE at removing aluminum oxide.

2. You can get weld lugs that allow you to weld the cable end with a tungsten-inert-gas welder.

3. If you really want to experiment, you can electroslag weld using a flux that melts at a higher temperature than aluminum. Electroslag welding starts out as a submerged arc and when the flux pool grows enough the arc extinguishes and then you have a resistance welding method. The current melts the flux and then the flux melts and refines the metal.