[ale] OT: slow back-UPS

Cor van Dijk cor.angela at mindspring.com
Fri Jul 23 14:43:24 EDT 2004


"Keith R. Watson" wrote:

> At 20:20 7/22/2004 -0400, you wrote:
> >Greetings,
> >I have several power backup units and they work ok with pc's. I also
> >have a digital audio recorder,
> >for which they do not work. It appears that the response time is too
> >slow. All of the ones I have
> >checked have a response time of 150 ms (or better they say), which is
> >almost 9 cycles.
> >Is anybody aware of faster ones or a way around this problem? The
> >recorder takes only 30 Watts,
> >so that should not be a problem. TIA.
> >Cor van Dijk.
> >
> >_______________________________________________
> >Ale mailing list
> >Ale at ale.org
> >http://www.ale.org/mailman/listinfo/ale
>
> Cor,
>
> There are different kinds of UPS's. See 02.04.3 of the UPS FAQ.
>
> http://www.non.com/news.answers/UPS-faq.html
>
> 3. What I call "true" UPS systems, those supplies that continuously operate
> from an inverter. Obviously, there is no switchover time, and these
> supplies generally provide the best isolation from power line problems. The
> disadvantages to these devices are increased cost, increased power
> consumption, and increased heat generation. Despite the fact that the
> inverter in a "true" UPS is always on, the reliability of such units does
> not seem to be affected. In fact, we have seen more failures in cheaper SPS
> units. [ Note, though, that given the same quality inverter, you'd expect
> the one that runs least to last longest. ]
>
> keith
>
> -------------
>
> Keith R. Watson                        GTRI/ITD
> Systems Support Specialist III         Georgia Tech Research Institute
> keith.watson at gtri.gatech.edu           Atlanta, GA  30332-0816
> 404-894-0836
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://www.ale.org/mailman/listinfo/ale

Thanks Keith,
There appears to be a whole lot more to a UPS than I thought. The search for a
"true UPS" is on. In case you happen to know where I can get one I would
appreciate to hear from you. The vendor list at the end of the FAQ is ten
years old.
Thanks again, Cor van Dijk



More information about the Ale mailing list