I see the big telcos build a kind of shield above/around their installations.
Big poles connected with thick grounding cables on the edges.
-------- Ursprüngliche Nachricht --------
Von: Ken Hohhof <[email protected]>
Datum: 25.10.2015 23:37 (GMT+01:00)
An: [email protected]
Betreff: Re: [AFMUG] Site Grounding - what we are doing wrong?
Well, not necessarily. It is possible to turn grounding and shielding
into a religion and lose track of what they are accomplishing.
For example, the power company guy in up in the bucket doesn’t rely on
grounding to protect him from high voltage, and neither do the birds sitting on
the wires. I’m not saying TJ is right, but be careful of adding more
grounding without thinking about what you are grounding, to what, and why.
I also wonder if Gino is seeing this everywhere, or just at a few
towers. I think some towers have problems and you can’t fix it without
going beyond just your equipment.
If it’s everywhere, did this coincide with a change to a different
brand/model of radios?
From: Mike Hammett
Sent: Sunday, October 25, 2015 5:06 PM
To: [email protected]
Subject: Re: [AFMUG] Site Grounding - what we are doing
wrong?
If
what you've done isn't working, then it isn't enough, not that it's too
much.
-----
Mike Hammett
Intelligent
Computing Solutions
http://www.ics-il.com
From:
"TJ Trout" <[email protected]>
To: [email protected]
Sent:
Sunday, October 25, 2015 5:04:32 PM
Subject: Re: [AFMUG] Site
Grounding - what we are doing wrong?
Gino,
Try not grounding at all?
On Sun, Oct 25, 2015 at 1:39 PM, George Skorup <[email protected]> wrote:
I
have no doubt it's the SS clamping that's blowing the fuse. If there was no
fuse, I bet the SS would continue clamping and start smoking if there's
enough
current to supply it. I don't know if it helps save things, but I'm leaning
towards yes. Just getting all of the radios on the same DC bus seems to have
helped quite a bit as well.
On 10/25/2015 12:51 PM, Ken Hohhof
wrote:
Speaking
of fuses, I know sometimes we get overcurrent trips on CTMs and
SyncInjectors and have to reset them. Very rare, but always during
storms. It is possible this is saving radios, I can't say for
sure.
-----Original Message----- From: George
Skorup
Sent: Sunday, October 25, 2015 12:34 PM
To: [email protected]
Subject: Re:
[AFMUG] Site Grounding - what we are doing wrong?
One
thing we've been doing for several years now is a bonding wire up
the
tower. I do not trust the tower steel/leg joints being low
enough
resistance. Failure rate went way down. DC and fuses doesn't hurt
either.
On 10/25/2015 10:57 AM, Gino Villarini
wrote:
So
we are loosing radios left and right due to lightning!
Typical site
setup:
Radios on tower grounded to tower
Shielded
cable
Shielded patch panel - grounded
Regular cat5
jumpers
Wbmfg SS - grounded
Regular cat5 jumpers
Poe
device
What's
wrong?
