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modifying ups to handle heavier load

?

~

Jan 1, 1970
0
i know you are going to be tempted to say "why not just get a bigger
ups" howeveri am on a tight budget and i have parts from a broken 520
ups and i was wondering is it enough to just replace the large
transformer in a 200 ups with a transformer from a 520 ups because on
aug 7 there was a power outage and i have 2 computers and a router and
cable modem connected to the ups.

and i noticed the famous smell of a transformer or motor getting too
hot so i had to shut down the computers and the ups to prevent burning
it out.

also the ups is connected to a deep cycle battery to allow longer run
time and i think the ups may be a 200 to 300 and i wanted to check if
just replacing the transformer is enough or if i have to replace the
transistors too.
 
M

Michael A. Covington

Jan 1, 1970
0
Replace the transformers, the batteries, the power transistors, some current
sensing resistors, fuses, circuit breakers...

A larger battery alone (more AH, same voltage) would give it the same output
power capacity but would enable it to run longer in a power failure. But
you say you've already done that...
 
J

Jerry G.

Jan 1, 1970
0
Generally speaking, the impedance of the transformer is an important factor
in the match to the existing output devices, when replacing it for another.
The transistors would definitely have to be replaced, or the output stage
redesigned using more of the same type in the proper arrangement to handle
more current. Then the drives to them would have to also be upgraded to
supply more drive current to the heavier output stage.

If you are not technically skilled and do not have the resources to modify
the UPS, you may end up with one that is not working, and not feasible to
service back to the way it was.

In other words you want to re-design the UPS. I would get another, and run
with two of them side by side. This would work, instead of having one great
big one. You can infact use a smaller UPS for each individual groups of
equipment.

--

Jerry G.
==========================


i know you are going to be tempted to say "why not just get a bigger
ups" howeveri am on a tight budget and i have parts from a broken 520
ups and i was wondering is it enough to just replace the large
transformer in a 200 ups with a transformer from a 520 ups because on
aug 7 there was a power outage and i have 2 computers and a router and
cable modem connected to the ups.

and i noticed the famous smell of a transformer or motor getting too
hot so i had to shut down the computers and the ups to prevent burning
it out.

also the ups is connected to a deep cycle battery to allow longer run
time and i think the ups may be a 200 to 300 and i wanted to check if
just replacing the transformer is enough or if i have to replace the
transistors too.
 
D

David

Jan 1, 1970
0
What you will wind up with is no working UPSs if you proceed with your
modification plans. It will cost much less to simply get another UPS
for the second computer system.

David
 
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