Do you have any pictures of it installed? I'm curious how you mount
that in the rack or equipment box.
On 6/28/2021 4:39 PM, Ryan McAfee wrote:
Depending on mounting, I really like the BlueSea marine fuse blocks.
https://www.bluesea.com/products/5031/ST_Blade_Fuse_Block_-_12_Circuits_with_Negative_Bus
On Mon, Jun 28, 2021 at 4:35 PM <[email protected]
<mailto:[email protected]>> wrote:
Message: 4
Date: Mon, 28 Jun 2021 16:33:39 -0500
From: Nate Burke <[email protected] <mailto:[email protected]>>
To: AnimalFarm Microwave Users Group <[email protected]
<mailto:[email protected]>>
Subject: Re: [AFMUG] Tower UPS's (again)
Message-ID: <[email protected]
<mailto:[email protected]>>
Content-Type: text/plain; charset=windows-1252; format=flowed
How do you distribute the 48/24v power? A row of fused links?
circuit
breakers? That's always been the part that looks cobbled
together. I
see Windstream rectifier racks with wire nuts, and wire just
hanging out
in the open, and an autozone inverter sitting on a shelf, so
apparently
even the Telco's don't always have good solutions.
On 6/28/2021 12:35 PM, [email protected]
<mailto:[email protected]> wrote:
> You already pointed out the major plus to A/C power: It's
simple. Any joker
> can come along and plug something in. Almost every device has a
110VAC
> option.
>
> UPS's are looking cheaper because you're getting used/refurb.
You'll come
> out more comparable with a new DC system compared to a new UPS
with similar
> runtime and capacity.
>
> I've never had a UPS as reliable as a rectifier. A handful of
failures out
> of dozens over several years does not actually sound reliable at
all. It's
> obviously tolerable to you in your scenario, but it's not telecom
> reliability. Scale that up to 100's of deployments and you'll
be chasing
> dead UPS's more often than you'll want to.
>
> The good rectifier systems will be -48v because that's the
standard for
> telecom power. If you're in Ubiquiti/Mikrotik land you'll have
to use
> converters to +24V. If you're in Cisco/Juniper/Arista land then
it can all
> be -48v and then you don't need the converters.
>
> I absolutely have been where you are now. If you're on a budget
where what
> you can afford is the used APC XL then maybe you just stick with
that. DC
> plant is better, but you will pay more for it and you'll pay
more for the
> routers and switches designed for it.
>
> These are all statements of opinion, but it's opinion informed
by 22 years
> of playing this game.
>
> -Adam
>
>
> -----Original Message-----
> From: AF <[email protected]
<mailto:[email protected]>> On Behalf Of Nate Burke
> Sent: Monday, June 28, 2021 12:58 PM
> To: Animal Farm <[email protected] <mailto:[email protected]>>
> Subject: [AFMUG] Tower UPS's (again)
>
> We've been using the APC SmartUPS 750XL as a Tower UPS for
several years.
> Put 2-8 100+AH AGM Batteries on them, and they've been rock
solid for us. I
> can think of only a handful of failures in the dozens deployed
over the last
> several years. I used to source them off ebay for $50-$70 each,
but they're
> becoming more and more scarce. Anybody have a recommendation
for a simple
> UPS that will do all the monitoring that the APC does and accept big
> batteries?
>
> We're a Metro-Rural Area, our power outages are usually measured
in Hours,
> not days. So I'm not as concerned with the inefficiency of
doing the
> DC/AC/DC Conversion for Runtime, just power stability during
> outages/fluctuations. I like the ease of connecting the external
> batteries to the APC, since the XL line has an Anderson plug on
the back for
> them, and has a larger charger than the normal UPS, so recharge
times are
> very quick.
>
> When the boss goes to the WISPA Shows, his head is filled with
all kids of
> ideas, so he want's me to investigate doing everything as a DC
Plant, When I
> price that out, with chargers, voltage converters (24/48),
inverters, fuse
> protection, LVD, Monitoring, etc, it always seems like the price
is a couple
> hundred dollars of parts and it would be cobbled together.
>
> Am I missing something with doing a DC Plant? I see the telco's
at the
> sites using a rackmount rectifier with power supply modules, but
those are a
> several hundred by themselves, and they are only 48V, they don't
have to
> worry about 24v radios. When I build a site now, I drop in 2
batteries, and
> the APC, and the site is up and running in a couple minutes. A
DIN rail
> with a couple power supplies and the box is done, and has fully
monitored
> power, and I can plug in whatever I want without any equipment
> modifications.
>
> --
> AF mailing list
> [email protected] <mailto:[email protected]>
> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
>
>
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