(tower top) On Mon, Jun 28, 2021 at 3:18 PM TJ Trout <t...@voltbb.com> wrote:
> > https://www.amazon.com/gp/product/B08PT3PXSB/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 > > On Mon, Jun 28, 2021 at 2:58 PM Robert <i...@avantwireless.com> wrote: > >> Anderson Power pole gear. >> >> On 6/28/21 2:33 PM, Nate Burke wrote: >> > 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, dmmoff...@gmail.com 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 <af-boun...@af.afmug.com> On Behalf Of Nate Burke >> >> Sent: Monday, June 28, 2021 12:58 PM >> >> To: Animal Farm <af@af.afmug.com> >> >> 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 >> >> AF@af.afmug.com >> >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> >> >> >> > >> > >> >> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >
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