Hi Tim,
I have been specifying and running around one hundred APC 3000 UPS
units spread over about fifteen or more years and installed them in
different countries and running from one PC + monitor upwards with no
significant operational problems. I also specified and used many of
their 4KVA units without any operational problems. APC make very good
UPS units for USA and European markets.
APC's support department is quite another matter. I have had battles
with them over plainly incorrect specifications on their website, and
on technical matters such as not isolating Neutrals when tripped out
or when the APC is switched off (as I don't control wiring in the
locations I was installing, I was concerned that circuits could still
be at mains potential if Neutral/Live became reversed). There have
been deep conflicts within APC on the issues that I have tried to
resolve.
However, APC UPS 3000 units are very good in normal use and I still
specified them as well as AEG.
What is the specific problem you have encountered? (i.e., not the
problem APC say you have).
Charles
Quoting Peter Washington <[email protected]>:
Hi Tim,
On 21 October 2011 16:47, Tim <[email protected]> wrote:
I have and APC 3000 UPS <http://www.apc.com/resource/**
include/techspec_index.cfm?**base_sku=sua3000rmi2u<http://www.apc.com/resource/include/techspec_index.cfm?base_sku=sua3000rmi2u>>(see
link below) at work and it is causing a few problem. APC tech support want
me to run the UPS on battery on at least 30% load (but not using the current
server that are connected as the load for obvious reason). Now as this is a
3000va UPS how many basic PC will I need to plug into the UPS to attain a
30% load (I am assuming most PC have a 300w PSU?)
http://www.apc.com/resource/**include/techspec_index.cfm?**
base_sku=sua3000rmi2u<http://www.apc.com/resource/include/techspec_index.cfm?base_sku=sua3000rmi2u>
Any help would be appreciated
Tim
The simple answer of 30 % of 3000 is 900 VA so 3 PC's is definitely wrong.
This is because PC's nowadays generally have PSU's of anything from 250 W to
1000 W, AND because the load they draw from the mains is dependent on what
they are doing.
I suggest that a 1 KW electric fire would give a constant load of
approximately the right size, and if the APC tech wants a more precise load
then you need to look at other comparable electrically powered items.
If APC want a REALLY precise load, then you also need to take into account
Power Factor, which is a subject that needs considerably more space than a
simple email, so I'd suggest 15 x 60 Watt incandescent light bulbs, or, (if
you can find them), 9 x 100 W. You certainly can't use Compact Fluorescent
bulbs though, it's that Power Factor thing.
I hope this helps.
--
Cheers Peter
--
Next meeting: Bournemouth, Tuesday 2011-11-01 20:00
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--
Next meeting: Bournemouth, Tuesday 2011-11-01 20:00
Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/
How to Report Bugs Effectively: http://goo.gl/4Xue
