How to Find and Fix Failing Overhead Splices

[@DrLumpyDMus]

A shunt splice repair on a line near me cured a lot of RFI for the neighborhood, on a lot of frequencies. The very informative crew told me that before repair, it was 48 uOhms on one side and 12 on the other. After repair, splice R was less than the R of the cable, just as this video demonstrates. The repair totally eliminated a bunch of noise on VHF/UHF ham, pub service, local school HTs etc. What was equally impressive was their timely response. I filled out an online form and went to lunch. When I returned, trucks were setting up at the eventual repair spot, other trucks were scanning the lines for about 2 miles up and down the line. Whole thing was probably two hours from time of reporting to ticket closed. Thanks APS Phoenix. Lots of E. Not a lot of R. Thanks for these videos, T&D.

[@johnkulpowich5260]

Thanks for what you do. This Miller high life for you

[@JerickaBingham]

Hey you awesome people that you all are.. just dropping by today to say thank you for all the things such as effort, risk, hard work, and other things that you do for all of us!! Not to mention the cold or extreme heat or other weather conditions that you all go through so we all have the blessings and luxuries that we do. Forever grateful and forever loving you all. Almighty God bless you all and reward you for all that you do!! As well as for your loved ones and us all. Have a blessed and safe day and week.. Loving you all. Love Melissa aka jericka Mikey.. hehehe love you all... byyyeeee

[@jt2988]

Made my guts flip flop!!! Awsome video

[@r3tr0nic]

Seems pretty wild that a ~40μΩ is a cause for concern, but then again if you have hundreds of kilometres of transmission line and many of these similar resistances, they add up. I am not sure what kind of amperage is typical of that 230kV line, but judging from the physical size it appears to be, I'd reckon a guess of 1kA or so. Amazing again, that @ 1kA, a 40μΩ resistance would cause a 48 Watt dissipation loss. Seems small, but it was enough to clearly see the losses (as heat) in the thermal imaging inspection. I'd guess the watt loss is not the real concern, but the thermal runaway degradation of the splice connection Awesome video & footage as always! *^_^*

[@imadewn]

SALCON This transmission line uses 230kV L-L, which is around 132kV L-N. Average transmission conductor is ACSR 300mm^2 which carry approx. 650A max current. Resistance 12um on the conductor itself generate natural losses around (650)^2 x 1.2x10^-5 = 5watts/m. If 200km transmission line = 5x1000x200=1 Megawatts of losses per conductor line

[@chethanningappa]

@@imadewn where do we find splices details or catalog,

[@movax20h]

@@imadewn Wow. 1MW of losses over 200km. I know it is a relatively small fraction of the total power transmitted, but still obviously is a huge value just spread thinly over very long distance, so it is hard to see.

[@sylviaelse5086]

Looks like a single engined helicopter hovering in its avoid region. Engine failure will cause a crash

[@chethanningappa]

splices catalog do you have any idea where ir available

[@jchambers2586]

my friend spider work for them

[@chethanningappa]

looking for splices details

[@chriscostanzo1404]

Please visit classicconnectors.com for more details with this process.

[@BenjaminEsposti]

Tens of uOhms? Wow, and I thought half a milliohm FETs were low-resistance ... XD

[@movax20h]

Well, 500mm^2 aluminium cladded copper cable in 10cm will surely be hyper low resistance. :) Half milliohm R_DS(on) FET, that is actually a really good value for a single FET. :) When you are passing few kiloampers over hundreds of kilometers it does add up to losses.