TT:
A bit off-topic so I apologize.
When I was working for a power utility, back in the 80s, we used to
describe those top-of-tower shield wires as "lightning umbrellas." The name is
obvious from that description..
Looking at the photos of the pole lines in the link below I was reminded
of the work I did installing and testing those shield wires which also had
fiber-optic cables in the center. BICC of the UK patented the concept in 1977
and our utility, PP&L in Allentown, PA, installed the first few spans in the US
in 1981. (Hydro Quebec beat us by three months and installed the first spans
in the western hemisphere.) We wanted to develop a communications channel
between our substations that would not noise up like a copper phone line during
a lightning strike - just when you need to send a breaker trip tone signal to a
remote substation.
73 deGene Smar AD3F
-----Original Message-----
From: Jim <jimw7ry@gmail.com>
To: towertalk@contesting.com
Sent: Thu, Oct 20, 2022 12:24 am
Subject: Re: [TowerTalk] High-Tension Wires
What voltage are these lines? How many bells on the insulators? Old or
new structures?
I too had *167KV lines* run through my 13 acres via a right away. Never
gave me any problems. They were about 800-1000 feet away from my
antennas. These lines were on a 2-pole structure with very large cross
arms between the poles. The three conductors were hanging on 15 bell
insulators.
However, they did attract lightning, which hit the "statics (AKA Shield
Wires)" (ground conductors they run on tops of the poles, between each
pole) and ground at each pole with a butt wrap)... Such as the ones
shown in this picture on the 2-pole structures:
https://oppdthewire.com/how-works-shield-wires/
A good test is take a small AM transistor radio to the property your
looking at and give a listen to a weak station or or even a blank
frequency on the AM band and see what you hear.
As said before here, I had more issues with the 7600 V distribution
lines than I did with the transmission line.
Thanks, 73, Jim W7RY
On 10/19/2022 7:56 PM, Paul F. Merrill wrote:
> We are looking at a house in the Northeast that abuts a utility easement
> with High Voltage Transmission lines.
>
> Should I pass on the property? The HF towers would be <500’ from the
> wires. Given the 4 seasons, ice, humidity, etc. is this doomed to failure
> by its very proximity?
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