The failing ups problem might be protected against with a dpdt relay with a 120vac coil, wired to select power from the ups whenever the ups output is energizing the coil and to spring back to utility power when the coil is off. On Oct 7, 2011 6:17 PM, "Tom DeReggi" <[email protected]> wrote:
> We used these a lot in commercial building closets, because of their > compact > foot print, and excellent Power protection.. > (Although never used the snmp card) > > We've pulled almost all of them out to date. The reason we stopped using > them is that like all other consumer UPSes, they tend to fail bad, when > batteries die, and not restore power to the equipment until a site visit to > remove UPS from service. (although we did like that it has a physical > on/off > switch, not just button, to force UPS on state). > > Whats also a pain is that the internal batteries are NOT easilly removable. > You have to take it apart in half, and hope not to short anything in the > process, and prey the leads stay on when put back togeather. (unless > they've changed the cases, for better access, since) > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > ----- Original Message ----- > From: "Matt" <[email protected]> > To: "WUG" <[email protected]>; "WISPA General List" <[email protected]> > Sent: Friday, October 07, 2011 5:12 PM > Subject: [WISPA] Adding External Batteries to a UPS > > > > Looking at this UPS. > > > > http://www.tripplite.com/en/products/model.cfm?txtModelID=3007 > > > > It is small enough to fit in our standard outdoor enclosures. It also > > supports being monitored by SNMP. Problem is it does not have an > > external battery connector. Has anyone had any luck adding external > > batteries to a UPS like this? > > > > > > > -------------------------------------------------------------------------------- > > WISPA Wants You! Join today! > > http://signup.wispa.org/ > > > -------------------------------------------------------------------------------- > > > > WISPA Wireless List: [email protected] > > > > Subscribe/Unsubscribe: > > http://lists.wispa.org/mailman/listinfo/wireless > > > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ >
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