I'm always torn about having one at the top. Seems like one more thing
that might leak or give me an issue. For a lot of WISP equipment, the
cost of replacing it vs the cost of replacing a blown SS is irrelevant
compared to the cost of the downtime and the tower climber.
Maybe I'm wrong. I'm open to other opinions.
On 8/31/2020 10:48 AM, [email protected] wrote:
OK, but did the surge suppressors protect the Tik?
Nearby strikes induce hundreds to thousands of volts per meter in all
conductors.
Most of the stories I hear is that the surge suppressor is blown to
bits but the devices it is connected to are OK.
But the closer the strike, the more damage.
Some folks have surge suppressors at the top, some at the bottom, some
at top and bottom.
*From:* Josh Luthman
*Sent:* Monday, August 31, 2020 8:35 AM
*To:* AnimalFarm Microwave Users Group
*Subject:* Re: [AFMUG] Surge cards, what should I expect?
The Tik is grounded to the bus bar. The surge cards use the WBMFG
metal boxes which ground to the same ground, but a different bus bar.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mon, Aug 31, 2020 at 10:30 AM <[email protected]> wrote:
And was the Tik connected to the surge suppressors?
*From:* Josh Luthman
*Sent:* Monday, August 31, 2020 8:21 AM
*To:* AnimalFarm Microwave Users Group
*Subject:* Re: [AFMUG] Surge cards, what should I expect?
Surge cards are only inside the building.
We lost 0 ethernet ports on the Tik.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mon, Aug 31, 2020 at 9:59 AM Ken Hohhof <[email protected]> wrote:
We’ve gone to the “Cat6” (gas tube) versions but I don’t think
that has any bearing on your question, if anything they may
offer less protection, but better Ethernet data integrity.
Are you putting these at both ends of the cable, or only at
the switch or router end?
I never assume they protect the radios, unless the surge is
coming from the network side, e.g. a power line surge. They
protect the network equipment like switch, router or POE. If
the surge is coming from the radio end, my personal opinion is
a surge protector may actually increase the chance of radio
damage by giving the surge a path to ground via the cable.
But let’s face it, if the tower take a hit, you may lose
equipment no matter what you do for grounding or surge
protection. Best bet may be fiber for data and a direct power
cable with a DC surge protector right at the radio.
Strange that the Powerbridge was the only survivor, as you
say, it’s not exactly a high end piece of equipment, basically
a Rocket PCB built into a panel antenna. But it might be
interesting to do a failure analysis on the stuff that died.
Most of the time I find it’s the power supply that got fried,
the radio won’t even power up. I looked at a Transtector
product once that had fuses in the protection modules, that
would seem to mean you always have to replace the modules
after a surge, but maybe the fuse opening up is better for the
radio.
I suspect you just had a bad day. It happens despite best
efforts.
*From:* AF <[email protected]> *On Behalf Of *Josh Luthman
*Sent:* Monday, August 31, 2020 8:27 AM
*To:* AFMUG <[email protected]>
*Subject:* [AFMUG] Surge cards, what should I expect?
I've regularly used the 444 cards. Pretty much exclusively
for years we've been using the GIGE-APC-HV.
On a tower with 9 devices, I lost 8 of them. We've had 0
problems on this tower since adding the surge cards almost 6
years ago. A mix of Ubnt/Cambium. The one device that
survived was a Powerbridge (the shitty panel) with one of the
old surge cards that has an LED on it indicating power. All 8
other devices needed to be replaced on the tower.
What should I expect the surge cards to do? I keep reading
that the card should sacrifice itself so we can just replace
the card on the ground instead of the radio on the tower -
better for a 1 person fix, way cheaper, ground instead of
tower, faster, etc. The tower owner is a big Motorola R56 guy
and gave us the thumbs up with how we did the grounding.
Did I just get screwed hard for some reason? An employee of
the tower owner came out and had to fix some of their gear for
their two way Motorola radio stuff, too, so maybe it was just
a really shitty day.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
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