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Level One Inspection Services
recently had the opportunity to read your RFI
"Tips and Tricks" article. I was very impressed by
the majority of the content; however there are a few points I would like
to make relating to power line noise:
I have worked as a Line
Technician (Lineman) for 18 years, and in the past six years I've taken on
the roll as RFI mitigator for a major utility company. I have seen a great
many sources of RFI both internally and externally generated. I have also
seen a great deal of other utility companies who are ill equipped to
handle claims of RFI. I believe that in this day and age of wireless
communication Radio Noise pollution concerns us all, these are concerns
which should not be ignored. To ignore any concerns regarding RFI is to
RFI Investigations can be costly if companies
are using untrained personnel, and outdated equipment. As is the case with
all business, profitability is key to survival. Companies don't want to
waste time, and money searching for something that can be so elusive--this
is simply not cost effective. Hundreds of thousands of dollars are
unnecessarily spent on maintenance due to poor practices.
with other's property is a major liability, and in this case, tampering
with high voltage equipmentcan cost lives. To suggest "shaking guy wires,"
and "Mule kicking" utility structures in an attempt to isolate an RFI
source could be catastrophic! To give you an example:Bell type insulators
are held in place using pins. If one of these should be loose, or barely
holding the conductor, and someone should shake or kick the structure,,, a
7200 volt power line could simply fall to the ground, possibly causing
injury or death to anyone who might come in contact with it. I have seen
broken switch insulators, which could be shaken to fall as well. Guy wires
are often times non-insulated. There is a definite potential path to
ground through a steel guy wire. If by some chance this wire is shaken
loose, or whipped into primary (14.4KV-4.16KV)
or even secondary voltage lines (480V-120V),
well, I think you see my point!
I would ask that you please revise
this article so that we are not risking life and limb. Structural
tampering of high voltage lines and equipment should be left to trained
personnel, People who fully understand the equipment involved, as well as
(ARTICLE WAS REVISED
THANKS TO GERALD)
I have seen a growing
need for more trained personnel within the electrical Industry, and that
being the case; I have formed a new company. Level
One Inspection Services focus's a strong emphasis
on training, and utilizing the proper equipment in the isolation of power
line generated RFI. We offer an audio/visual inspection (dual inspection)
designed to isolate problematic power equipment prior to failure. We hope
to provide a proactive, higher level of experience on behalf of your local
Please feel free to look us up on the web at:
www.leveloneonline.com As this is a new
company, much of the site is currently under construction, however I
encourage you to visit as often as you would like, and to pass this
information along to fellow members. We would welcome posting your site
link on our site as well."
Level One Inspection Services
MORE ABOUT TROUBLESHOOTING RFI ON
POWER LINES AND THE DANGERS TO YOU!
From Mike Martin,
(From a recent email and slightly
I have for many years been training power companies and other
utility personnel to locate power line noise sources.
I have explained
the dangers of contacting guy wires and anything else attached to the
utility poles due to the possibility of coming into contact with energized
equipment. This occurs when energized equipment comes into contact with
hardware not normally energized.
also occur when energized equipment is very close to ungrounded
Guy wires, although they appear to be
grounded, are typically not.
anchor to guy connection is not a sufficient connection to be considered a
This became very apparent in 2004. At a power company in
MD, an engineer accidentally touched a guy while looking up and stepping
backwards. The fire dept. received a call to respond to a brush fire.
It wasn't a brush fire!!! Sometimes the apparent danger isn't at the
pole you are near, but possibly several poles away.In your tips &
tricks page you recommend touching guys and tapping poles as a means of
detecting the source pole. I have located hundreds of power line
noise sources that if pulled or sometimes even tapped could have been the
next step to a catastrophic result.
I was taught this method of
detection as well.
I changed my
methods after a J lag fell from the pole I had tapped. It came down and
pierced my hardhat. The light came on in my head and I realized why they
had a hardhat policy.
I thought it would be smarter to stop hitting the poles and I
wouldn't need the uncomfortable hardhat. They didn't agree with not
wearing a hardhat, but they did appreciate the idea of not hitting the
Check out the link at the top of my web page
titled "T&D Magazine Article". I think you might
like it. (It takes you to a very interesting ARRL
article)..Thank you for taking the time and applying the
effort to help inform us on the subject of RFI. If I can assist you in any
way please feel free to
RFI Services...... Check out Our Web Site at www.rfiservices.com for more RFI
Nextel Direct 164*21*29180
Martin owns and operates the RFI locating & consulting firm called
Services. He's been locating
interference sources and training Power & Telecom companies full time
for over 20 years and solves an average of 500 interference complaints a
year. He takes advantage of the opportunity to test all RFI locating
equipment and makes recommendations to the manufacturers for improvements.
Mike has received acknowledgments in many publications including: AC Power
Interference Handbook * AC Power Interference Manual * Power Line
Interference, A Practical Handbook * T&D Magazine and *The American
Radio Relay League Journal
Mike is multi-licensed
by the FCC and considered to be the most experienced Interference
Investigator in the country.
has lots more information pertaining to RFI with some very good audio and video samples of RFI power line
noise. Check it out now!
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