> How much current/watts does a PC (P200) and a sparc5 draw?
> I know the PC has a 250W power supply, but it wouldn't be
> actually using all that would it?
My 1100VA UPS is currently sitting at 40% (+/-10%) utilization.
It is powering:
- 3PCs (6x86-133, P133, P75)
- 6 hardisks between them
- 56k external modem and 3com 8-port hub.
- 21" DEC monitor (however the spike when it's turned on/degaussed will trip
the UPS and cause the main power to be supplied directly for a second)
P75 with 2 HDD is enough to raise the utilization to 60% (+/-10% .. the UPS
only display utilization to nearest 20%).
> Next question is regarding those Centralion "backup power
> supplies" Jaycar sell. They're cheaper at $399 for the 800VA
> model (what does VA mean anyway?) but the blurb mentions they're
> not true UPSs because whilst the power is on it's not running
> through the UPS' batteries. When the power fails it switches over
> to batteries.
>
> Does this mean it still does "line conditioning" - ie. filters
> out surges, spikes? what about "brown outs"? it would have
> to be a "proper" UPS to be able to supply the full power during
> a brown out I would've thought?
I used to have APC UPS which was not fully online and it tried to deal with
brownouts by tripping at the first sign of one. This was annoying becase:
1. It was very noisy while running on batteries (including a beeping alarm
which could not be disabled)
2. Sometimes it did not catch it in time as my computer seems to be very
sensitive to dirty power.
I since replaced it with fully online Powertech UPS and no problem since.
The only downside with online UPS is the extra noise as they continuosly
whir.
Dave.
---
David Zverina
Alt Key Pty. Ltd.
http://www.altkey.com
PO Box 3121, Parramatta, 2124, Australia
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