On Thu, Dec 29, 2011 at 4:53 PM, Richard C. Steffens <[email protected]>wrote:
> I had a power outage this afternoon. I had saved my work beforehand and > was away from the computer at the time. When I saw the lights go out I > went to the computer to shut it down. It was already down and the > battery backup was not telling me it was dealing with a power failure. > The power is restored and all is working normally. But I'd like to > figure out why the battery backup failed. Recommendations on what to > look at will be appreciated. > > The battery backup is a Belkin F6C325-SER, which is rated for 325 VA or > 211 W. I've had this unit for quite a few years, possibly over 10. > > According to my Kill a Watt, my computer is drawing 1.40 A @ 118.2 volts > (drifting between 117.9 and 118.4), and the Kill a Watt says 112 W. > 118.2 V x 1.4 A = 165.48 VA. > > When the power failed I also had one monitor powered through the battery > backup. I have no monitor plugged in to the battery backup at this time > -- just in case it was the straw that broke the lead-acid battery's > back. The monitor that was plugged in at the time of the power failure > is currently drawing 0.29 A @ 118.2 V (similar voltage drifting as > above), 24 W. 118.2 V x 0.29 A = 34.278 VA > > My other monitor is drawing 0.25 A @ 118.2 V, 20 W. 118.2 V x 0.25 A = > 29.55 VA > > The battery was deemed to be working by a battery shop back in 2010. > > In theory I should be able to run the computer and both monitors. > (112 + 24 + 20) W = 154 W. (165.48 + 34.278 + 29.55) VA = 229.308 VA > > Is there some rule of thumb that says one should only count on some > percentage (less than 100) of the rated capacity of a battery backup? > > Thanks for hints, ideas, pointers, etc. > > -- > Regards, > > Dick Steffens > > > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug HI The specs.. *Belkin 325 VA UPS* Cord Length: 6 ft. Voltage: 120 VAC Volt Amps: 325 VA Watts: 210 Watt Output Voltage Regulation: Automatic Voltage Regulation Half Load Run Time: 13 minutes Battery Recharge Rate: 4 - Hours Dimensions: 8.6" x 6.2" x 8.8" Weight: 12.13 lbs. Outlets: 8 Outlets Outlet Orientation: 4 Battery and Surge 4 Surge Only The important information... Half Load Run Time: 13 minutes. It doesn't state Full Load run time..... Could assume 50%.. or 6.5 minutes in a perfect world.. I assume the software provides controlled shutdown with the time on the unit? HTH Marvin _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
