Lifetime RTU granted to James Van Meggelen :-) -dbc. -----Original Message----- From: Jim Van Meggelen [mailto:[email protected]] Sent: April-07-09 5:34 PM To: David Cook Cc: [email protected] Subject: Re: [biz] UPS: power conditioned
David, That bucket with the hole analogy is just about the best darn description I've ever heard! Thanks for that! Can I use that? Jim David Cook wrote: > I believe all APC upses qualify in that regard. Conditioning should refer to > methods of ensuring that transients and other oddities from the power line > never reach the equipment plugged into them. > > My understanding is that all APC upses (and most other "good" upses) are of > the variety that the line power only serves to charge the batteries - > nothing more. The batteries subsequently feed constant power into the > inverters which create the 110VAC (hopefully a sine wave) to power the > equipment. Therefore at no time are the products plugged into the UPS ever > connected to the line current and therefore not subject to stuff outside > affecting your equipment. > > The analogy used to explain it to me was filling a bucket (batteries) with > water with a fixed size hole in the bottom (VA rating of the UPS). As long > as some volume of water is retained in the bucket, you can fill the bucket > evenly or sporadically but the flow rate out the hole remains the same. > > If my understanding of this is full of crap, please let me know :-) > > -dbc > > -----Original Message----- > From: Frank Bax [mailto:[email protected]] > Sent: April-07-09 3:00 PM > To: [email protected] > Subject: [biz] UPS: power conditioned > > In the Asterisk book from O'Reilly; it says "Make sure your UPS is power > conditioned. If it doesn't say exactly that, it isn't." > > http://astbook.asteriskdocs.org/en/2nd_Edition/asterisk-book-html-chunk/aste > risk-CHP-2-SECT-2.html#asterisk-CHP-2-SECT-2.1 > > I don't see this wording on any UPS devices from APC; do they sell one? > If not, who does? > > Frank > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > -- -- Jim Van Meggelen [email protected] http://www.oreillynet.com/pub/au/2177 "A child is the ultimate startup, and I have three. This makes me rich." Guy Kawasaki -- --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
