UPS   what size do i need

Posted on 2014-10-19
Medium Priority
Last Modified: 2014-10-20

I need to purchase ups  for workstations.
They are regular workstations....    all of our work is done with remote desktop using these workstations in to our server
Question by:intelogent
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LVL 12

Accepted Solution

DarinTCH earned 668 total points
ID: 40391288
depends how lone you want them to stay up - not long if they are only server connected....
APC has a chart showing how long the Battery will provide power based on standard 200W draw

the basic unit start @ 400VA if i remember correctly and provide like 5 min - enough for a short power hiccup
we use at least a 500VA which is good for about 10 minutes
or sometimes the 650 if we can get it cheap usually they are like $75
there are definitely bigger and better
LVL 92

Assisted Solution

nobus earned 668 total points
ID: 40391388
determine first the power you need; best buy a kill-a-watt http://www.p3international.com/products/p4400.html
once you have the total power needed, you  can calculate what UPS model is needed
LVL 10

Assisted Solution

by:Scott Thomson
Scott Thomson earned 664 total points
ID: 40391461
If you are using remote desktop then the server is really the only thing that needs to have a UPS. All the lifting and data is help on the server and the connection will be kept alive.. seems like a strange thing to power proof these single workstations..

Do you get frequent power interruptions for 1 - 2 mins or something and its causing time issues..? otherwise I think this is an expenditure that is possibly pointless.

To keep alive at a minimum you need


And depending on how many switches/servers you use this may be quite high..
can you explain your setup a little more and what you are hoping to gain from power proofing these machines..?
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Author Comment

ID: 40391704
all good comments...

so let me be a bit more specific .

my units are all PS clones which i built from components.  i am looking to protect them for about 10 minutes.... until power  brown out is restored, and absolutely from power surges.   all have a 400   - 600 power supply.  All have  1 or two hard drive and the MB. and a non-gaming video card or on board video.
what is my power need.

they are rated in measures   650 Va /390 W       i just do not understand how to convert this to my needs..

perhaps this is a clearer picture as to what i am looking to do.

any help appreciated.

i see units are rate

Author Comment

ID: 40391713

styles like this    APC Back-UPS BE550G     can they by standing upright, or must they be flat on the floor.  much less of a foot print on its side..?
LVL 92

Expert Comment

ID: 40392076
don't use the power rating - measure what power you need for the pc, + screen, and whatevere devices you like to stay up

Author Closing Comment

ID: 40392151
thanks  Gents

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