how large a UPS?
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Thread: how large a UPS?

  1. August 9th, 2004, 10:54 PM #1
    sethfp
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    Question how large a UPS?

    How do you figure out how large a UPS a system needs?
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  2. August 10th, 2004, 08:36 AM #2
    Spork
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    Quote Originally Posted by sethfp
    How do you figure out how large a UPS a system needs?
    Depends on how much stuff will be running off it.
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  3. August 10th, 2004, 08:49 AM #3
    confus-ed
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    Quote Originally Posted by Spork
    Depends on how much stuff will be running off it.
    True, but it don't tell you so much .. - it goes like this..
    On the back of the equipment there should be a listing in either watts or amps. You need to calculate the voltage-amps (VA) power rating. If watts is given, VA=watts x 1.7. If amps is given, VA=amps x 120. Add up the total VA values. You will need an UPS with at least the total VA value.
    You also need to consider how much protected run time you need in the event of any failure, generally the more over the power rating you are the more time that should guarantee.

    Try here (where I nicked that quote from above -{there's even a wizard to work it out!} brief but it'll give you the idea)
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