[ale] OT: slow back-UPS

[Keith R. Watson]

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