You can always 100% rely on a standby generator not starting when you need it
the most.
From: Jesse Dupont
Sent: Sunday, May 21, 2017 7:02 AM
To: af@afmug.com
Subject: Re: [AFMUG] 24V Battery Revert and Charge Module
Well, that is a concern. I think we'll be under 30A after all is said and done
and the DR-UPS40 handles 40A. Downside would be the 2A charging rate. I should
note this site will have an automatic standby generator so we won't need a huge
battery string.
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From: Af <af-boun...@afmug.com> on behalf of Gino A. Villarini
<g...@aeronetpr.com>
Sent: Sunday, May 21, 2017 4:47:19 AM
To: af@afmug.com
Subject: Re: [AFMUG] 24V Battery Revert and Charge Module
How do you plan to connect to batteries for this setup ?
From: Af <af-boun...@afmug.com> on behalf of Jesse Dupont
<jesse.dup...@celeritycorp.net>
Reply-To: "af@afmug.com" <af@afmug.com>
Date: Saturday, May 20, 2017 at 7:07 PM
To: "af@afmug.com" <af@afmug.com>
Subject: Re: [AFMUG] 24V Battery Revert and Charge Module
The Meanwell SDR-480P-24 and -48 do current sharing so you can stack up to 8 of
those in parallel to have a lot of capacity and N+1 redundancy without the
DR-RDN20 redundancy module.
We're getting ready to do a four unit N+1 at a site that has 16-17 Amps already
and is getting some LTE base stations added to it.
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From: Af <af-boun...@afmug.com> on behalf of George Skorup
<george.sko...@cbcast.com>
Sent: Saturday, May 20, 2017 4:55:25 PM
To: af@afmug.com
Subject: Re: [AFMUG] 24V Battery Revert and Charge Module
List price on the BCMU360 is about $215 IIRC. I think we pay about $175 from
PSUI. Plus $15 for the temp probe.
Are you asking run time? I have a couple with 40Ah of battery attached. A few
with about 90W load have ran for over four hours, but they never went down,
utility came back. A couple others with ~190-220W. Lost utility at one of the
sites the other day. It was running for about an hour and a half before I
brought a portable gen out. That site didn't go down either. Couldn't let it,
too much traffic. And of course utility came back 15 minutes after I got the
generator going.
Gino A. Villarini
President
Metro Office Park #18 Suite 304 Guaynabo, Puerto Rico 00968
On 5/20/2017 4:51 PM, Gino A. Villarini wrote:
How much are you paying for the Traco and how long does it last?
On 5/20/17, 4:44 PM, "Af on behalf of George Skorup" <af-boun...@afmug.com
ï¿1Ž2
Gino A. Villarini
President
Metro Office Park #18 Suite 304 Guaynabo, Puerto Rico 00968
on behalf of george.sko...@cbcast.com> wrote:
>Mean Well AD-155B
>or
>Mean Well SDR-240-24 + DR-UPS40
>or
>Mean Well SDR-240-24 (or 48) + Traco BCMU360 (jumper selectable for 24
>or 48) - I use this combo most often. The BCMU360 is only good for ~240W
>continuous.
>
>All this stuff is fine until you start looking to deploy things that are
>power hungry like 450m's @ 70W, LTE eNB's that pull 60-100W each,
>multiple AF24s or licensed radios, etc. Then you need big-boy
>rectifiers, which aren't all that expensive, but they aren't cheap
>either. Add good telco-grade batteries on top and it's easily 10x the
>cost of what we're used to with the smaller stuff.
>
>On 5/20/2017 1:16 PM, Matt wrote:
>> What is everyone using for switching from AC to battery backup at sites?
>>
>> I normally have our other guy take care of that part.ï¿1Ž2 But we normally
>> have a DIN mount 24V power supply, a DIN mount packetflux site monitor
>> that monitors power supply output and battery voltage and some DIN
>> mount module that does charging and switching between the two.ï¿1Ž2 Also
>> have a 24V to 48V converter to power our 450i etc stuff.
>>
>> Monitor the site monitor with SNMP and start emailing alarms if power
>> supply voltage drops.ï¿1Ž2 Also graph power supply and battery voltage
>> with MRTG.
>>
>> Curious what others are using here?
>
