Yes, there is temp compensation, but not that important to me with the
sites we're putting it in. The load is isolated from the batteries,
which is why it can do multi-stage charging (recovery/boost/float).
However, based on the literature, the load voltage will follow the
battery voltage. We do use a Traco to knock that down to 24V for some
devices like MT and UBNT.
So I am trying these out. Will let the group know after I have some
experience with them.
bp
<part15sbs{at}gmail{dot}com>
On 1/6/2015 7:56 PM, George Skorup (Cyber Broadcasting) wrote:
What about temperature compensation? And is the output regulated or is
it essentially parallel operation and you get battery float voltage? I
went with the Traco because the temperature compensation is one thing
that I absolutely need. And I can handle the unregulated voltage with
an RSD. For smaller sites/micro POPs, now I'm just throwing in Mean
Well AD-155's. No temp. comp. but I'm not all that worried about those
because they're not supporting hundreds of $$ worth of batteries that
I'd like to last. So far they have not severely overcharged batteries
like the APC UPS's do in only a few months, so I'm happy with that.
On 1/6/2015 5:04 PM, Bill Prince wrote:
We just got a couple of the 24V versions and it was only $300 each.
About the same as the Traco for the two separate units. I sure
appreciate the differences, but I was looking for extra-small form
factor on a DIN rail. Because this site is on AC power 99.99% of the
time, it's not a big deal (to me) if it takes 24 or even 48 hours to
get a full charge. IIRC, these units also have LVD.
bp
<part15sbs{at}gmail{dot}com>
On 1/6/2015 10:26 AM, George Skorup (Cyber Broadcasting) wrote:
Those are really expensive. A Traco TSP+BCM is several hundred less
at almost every wattage, last time I looked anyway. I like the split
power supply and battery module. A lot cheaper to replace a failed
component than an entire $700-1k all-in-one. But that's just me. The
Traco gets you temperature compensated charging and LVD. You get
contacts for DC input OK, batt OK/fail, etc. Hook that up to a
SiteMonitor switch closure module and you have pretty good remote
visibility. Put shunts wherever you want to monitor, battery
charge/discharge current, output rail current, etc.
On 1/6/2015 10:49 AM, Bill Prince wrote:
Try these. We are about to install a couple of them. Some models
have ethernet ports for a GUI (no SNMP :-( ). But they do have
contacts to send alerts through a SiteMonitor (for example).
http://www.altechcorp.com/power/CBI-UPS.html
On Tue, Jan 6, 2015 at 8:23 AM, Christopher Tyler
<[email protected] <mailto:[email protected]>> wrote:
I'm at my end. I've been looking at this for a while now and
it's obvious that no one makes an industrial APC UPS that works.
We've tried the Alpha Cordex (DIN rail) and the ICT (19" rack)
and neither one can do what a APC management card can. We just
need it to provide 24vDC to a load and when the AC power goes
out, send an alert and let us monitor the system status via SNMP.
Alpha:
PROS: DIN rail mounted
CONS: Web interface is IE only, SNMP requests are completely
broken, have not tested SNMP traps, cost is about $700.
ICT:
PROS: It works well as a dumb power supply/charger with UPS
functionality, web interface works in all browsers.
CONS: SNMP is limited to about 6 values, all remote
communication is lost when AC is removed, no battery monitoring
at all other than the voltage for use with LV cutoff which is
one of the values that is not available via SNMP. Also costs
about $700
I have to give it to Alpha at this point, at least their unit
remains "intelligent" when AC power is removed. If they would
fix their web interface and SNMP it would be perfect.
So... Does anyone have a solution that works that isn't
completely cobbled together? I need to know when we lose/regain
AC power, that the battery is draining, what the battery
voltage is so that I know when it's about to cut off, it needs
a LV cut off to protect the batteries, and all this information
needs to be available via SNMP and web. Am I asking for too
much or does something of this nature exist outside of
TrippLite and APC?
--
Christopher Tyler
MTCRE/MTCNA/MTCTCE/MTCWE
Total Highspeed Internet Services
417.851.1107 <tel:417.851.1107>
--
--
bp
part15sbs{at}gmail{dot}com
