Big sites ( 500 watts or more) we go Emerson. Great units! Mark pointed us that way...
Smaller sites go APC, our situation is that many remote sites have long power outages... 3-4 days sometimes Gino A. Villarini @gvillarini On Jan 6, 2015, at 3:21 PM, Ken Hohhof <af...@kwisp.com<mailto:af...@kwisp.com>> wrote: Have you looked at Eltek and Emerson? Although Eltek seems to be oriented around –24 or –48, and not so good for +24. Not familiar with Emerson, Mark Radabaugh has posted they use them. I have an Eltek Micropack –48V system and the web and SNMP capability is excellent. I did have one rectifier module fail, but it was pretty painless given they are N+1 redundant. From: Gino Villarini<mailto:g...@aeronetpr.com> Sent: Tuesday, January 06, 2015 1:15 PM To: mailto:af@afmug.com Subject: Re: [AFMUG] 24V UPS The problem with xl units it's the charger ... It has low amperage (5-8 amps dep model) and don't maintain well big banks The idea is to have the xl with internal batt and have a big bank connected to the external batt connector This bank will be isolated from the apc during AC operation. The bank will have a good charger and will run 24 dc loads(still under consideration) AC fails, the apc ups will see the big bank for extended runtimes Gino A. Villarini @gvillarini On Jan 6, 2015, at 2:51 PM, Josh Baird <joshba...@gmail.com<mailto:joshba...@gmail.com>> wrote: Hmm, give us details when you get them regarding the XL! Josh On Tue, Jan 6, 2015 at 1:45 PM, Gino Villarini <g...@aeronetpr.com<mailto:g...@aeronetpr.com>> wrote: Chris Thanks for this compressive evaluation. We bought 2 Alpha/Cordex unit for testing. We are in a similar spot, looking for a web managed power system in 24 and 48 vdc. You saved us the expense of buying an ICT unit. That being said, we are looking into using a slightly modified apc xl unit to run 24 dc direct from the UPS DC rail Gino A. Villarini @gvillarini > On Jan 6, 2015, at 12:24 PM, Christopher Tyler > <ch...@totalhighspeed.net<mailto:ch...@totalhighspeed.net>> 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> >
