Re: HP Power Trust UPS Info?

["Andy Whitfield" <andywhitfield2002@xxxxxxxxxxx>]

They are OK for small loads but for PCs and monitors see below.
Following the sequence....
www.trust.com   Products, Computer Products, Power Protection, 600=20
UPS Energy Protector, UPS back-up time calculator.
I put in the spec of ATX, Pent 4, 19" CRT, standard VGA card, 0 USB=20
devices, 2 HDDs, 1 CDRW, 0 DVD, 0 everything else.
And it came with the following runtimes....
400va  0 mins
500va  2 mins
600va  5 mins.

And remember the capacity of a battery reduces by around 25% per=20
year.  (battery capacity is how much electricity it can store).  So=20
runtime reduces accordingly.

I need to reduce my stock and I'm thinking of selling 10 APC Smart=20
700 with good batteries for =A3200.=20=20
It would be a cash only, bulk sale.
Is the enough interest in the group?

Regards
Andy Whitfield

--- In ukha_d@xxxxxxx, Dave McLaughlin <dave@v...> wrote:
> Thanks for that Andy. Useful info indeed.
>=20
> I only bought this one as I needed something to backup a 12V 5A=20
power=20
> supply that is used to power my control network so I therefor=20
didn't=20
> need anything fancy or expensive.
>=20
> I did try it on the PC and as you say, the runtime was way less=20
than=20
> they quoted. I only got about 5 mins at most and that didn't even=20
> include the monitor plugged in either. Very poor.
>=20
> I use multi-battery units on my PC equipment and use something that=20
> gives me at least 30 mins of run time. Have only ever had a major=20
outage=20
> once in the 3 years I have been here and that was about 4 hours=20
long.=20
> Most have been about 5-10 mins on average.
>=20
> Regards
> Dave...
>=20
> ---
> Very funny Scotty, now beam down my clothes...!!
> ---
> http://www.v8carlton.com
> http://www.embeddedcomputer.co.uk
> ---
>=20
> Andy Whitfield wrote:
>=20
> > Some small UPSs are cheap because....
> > 1) They cut back on batteries.  Eg. use a single 12v5Ah instead
of
> > two 12v7Ah (a third of the runtime!).
> > 2) When running on batteries they output a crude square wave=20
instead
> > of a sine wave.  Square wave output can cause interference on
some
> > equipment.
> > 3) Minimal front panel info.  Eg. One on/off button and one LED.
> >
> > And lastly they are greatly misleading on battery runtime by not
> > stating the load.  You'd never achieve anything like their stated
> > runtimes if using a standard PC + monitor.
> > Regards
> > Andy