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Shopping for UPS, need help choosing how much power I need.

by obsessed / June 30, 2008 12:20 AM PDT

I have delayed purchasing a UPS because I have been confused by all the options out there. There is every price range and power rating on these units and I am not sure what to look for. Does it relate to what my power supply on my computer is? I have a 600 Watt power supply for my desktop. I might also like to keep my VCR and TV cable box on the unit, as we have to reset these every time there is a power surge. Thanks for any advice.

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Let's try simple.
by R. Proffitt Forum moderator / June 30, 2008 12:49 AM PDT

Let's say your 600 Watt PC needs to run for one hour after power loss (not surge!) You need at least the 600 Watt Hour UPS to get to about one hour. As the unit ages a year they don't tell you to expect up to 50% less time. So I'd size that to 1200 Watt Hours.


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Can you clarify "loss" versus "serge?"
by obsessed / June 30, 2008 12:55 AM PDT
In reply to: Let's try simple.

Thanks, Bob, that's where I was leaning. I noticed your correction on power "loss." In my area, we don't get too much of that, and I usually would only need a few minutes to safely shut down. Just to give you an example of the need I am talking about, last night my kid used a faulty blow dryer that blew the circuit braker. Of course the computer lost power, and I wasn't in the middle of anything but am afraid of electronic damage from an unsafe shut-down. It only took a minute or two to reset the circuit braker. By the way, my processor is an AMD Athlon x2 5200.

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Surge, sag and power loss
by Steven Haninger / June 30, 2008 1:17 AM PDT

Basically, power surge is a momentary increase in voltage, a sag is a decrease, and a power loss is self explanatory. That's when the lights go out. Sometime during a surge you'll see incandescent lights brighten and a sag will cause them to dim. A UPS will have triggers to detect either of these two conditions and switch to battery as quickly as it can. During a power loss, the battery hangs on as long as it can until power returns. This gives you the opportunity to save your work and shut down. I use a UPS for those quick sags, surges and total dropouts that shut down or reset the PC. To me that's more important than using it as long as possible after the lights go out.

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But Serge is a type of fabric.
by R. Proffitt Forum moderator / June 30, 2008 1:24 AM PDT

"Serge is a type of twill fabric that has diagonal lines or ridges on both sides, made with a two-up, two-down weave. The worsted variety..."

We have that on some furniture here.

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LOL, with my power loss, and age-related memory loss, comes
by obsessed / June 30, 2008 1:26 AM PDT

spelling loss!!!! My bad. Happy

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depends on how long a blackout you want to handle
by ramarc / June 30, 2008 3:17 AM PDT
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(NT) Nice link!
by Coryphaeus / July 1, 2008 10:04 AM PDT
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