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You think that they want you to replace the batteries?Good comments...
If cells will swell and it is a known condition, then why do UPS
manufactures not allow for it in their battery case designs?
It would seem to be a common complaint from users and you would think
sooner or later the products would have space dedicated to this
condition.
"Where's my damn carrots, I want my carrots .....""This company wasn't serious about anything except the ceo's morning
plate of carrots "
Funny....wish I had come up with that comment.
TMT
You had to be there, listening to him stop down the halls yelling
In <LawrenceSMITH-C162AA.11573419102005@news.verizon.net> Ecnerwal
LawrenceSMITH@SOuthernVERmont.NyET> writes:
[ snip ]
with a flight plan to make your life miserable). A serious computer
center UPS should be down in some nice isolated basement room...
err, you're much better off with it
above any flood level...
which reminds me of what may, or may not, be a true
story back during the 1965 blackout.
(like all good urban legends, there's enough
plausability here, but I've been unable
to directly verify it).
In the Good Old Days before all the blackouts,
(and before modern day computers and such)
emergency power and lighting was in very few places.
One place usually equipped with something or another
was the local hospital.
NYC had (and has...) a very large municipal
facility called Bellevue. Well known (no) thanks
to generations of tv and movies as a psych place,
it's actually a fully capable (and nowadays
very highly regarded) institution.
Anyway, back in 1965 it had, by 1965 standards,
a pretty good emergency generator setup.
(In fact, in the early 1970s I saw the physical
power plant which had been installed Way Back When
We Built Things Right).
So... when the Sir Adam Beck substation did
its thing and plunged the northeast US (including NYC)
into darkness in 1965, Bellevue went out as well. But
a few minutes later, the generators came on and things
were back to (by 1965 standards) normal.
Except for one little problem.
Generators, especially back then, were big and ugly
and heavy. So... would be in a basement. (Additional
reason for this is it made getting the fuel to them
quite a bit simpler and more reliable).
ok... you know where I'm going...
Guess how high above sea level Bellevue is...
That's right, it's only a couple of dozen feet.
Now guess how high above sea level the
sub, sub, basement... where the generators
were located... is.
Eyup.
Now guess what critical part of the Bellevue plant
was _not_ hooked up to emergency power?
Eyup... the sump pumps.
So a couple of hours after the power went out,
the generators were underwater.
The end.
--
_____________________________________________________
Knowledge may be power, but communications is the key
dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]
batteries fit loosely.Good comments...
If cells will swell and it is a known condition, then why do UPS
manufactures not allow for it in their battery case designs?
It would seem to be a common complaint from users and you would think
sooner or later the products would have space dedicated to this
condition.
TMT
My guess: shock damage during shipping and handling would be higher if the
I just had 2 Tripp Lite UPS fail the same way. Charging voltage was 17.5I just finished working on a number of UPSs.
One thing I noticed was that many of the Sealed Lead Acid (SLA)
batteries were swollen and hard to remove.
Why do SLA batteries swell?
I did notice that the UPS manufacturers apparently do not design for
this problem. Many of the UPSs had to be partially disassembled to
remove the batteries because of the tight quarters the battery
containers presented. Very poor design in my opinion.
Any suggestions for preventing a recurrence of this problem?
Thanks
TMT
Sulfation, mostly. Crystal growth pries the plates apart.I just finished working on a number of UPSs.
One thing I noticed was that many of the Sealed Lead Acid (SLA)
batteries were swollen and hard to remove.
Why do SLA batteries swell?
Yes, they did. They designed for you to have this problem (tight case,I did notice that the UPS manufacturers apparently do not design for
this problem.
Sure - Buy an Outback inverter/charger and set up a battery bank (in aAny suggestions for preventing a recurrence of this problem?
TrippLite and the old Minuteman. Anywhere they can save a penny perI just had 2 Tripp Lite UPS fail the same way. Charging voltage was 17.5
volts. I e mailed Tripp Lite and asked for a schematic so I could tweak the
charging voltage down. They would not reply so I replaced with UPC brand. I
hope these are better designed. WW
In your dreams. They are just about as chintily designed and built as
Tripp Lite has always been very BAD for supporting theeir stuff....."Too_Many_Tools" <too_many_tools@yahoo.com> wrote in message
news:1129690971.151682.228850@f14g2000cwb.googlegroups.com...
I just finished working on a number of UPSs.
One thing I noticed was that many of the Sealed Lead Acid (SLA)
batteries were swollen and hard to remove.
Why do SLA batteries swell?
I did notice that the UPS manufacturers apparently do not design for
this problem. Many of the UPSs had to be partially disassembled to
remove the batteries because of the tight quarters the battery
containers presented. Very poor design in my opinion.
Any suggestions for preventing a recurrence of this problem?
Thanks
TMT
I just had 2 Tripp Lite UPS fail the same way. Charging voltage was 17.5
volts. I e mailed Tripp Lite and asked for a schematic so I could tweak the
charging voltage down. They would not reply so I replaced with UPC brand. I
hope these are better designed. WW
living the group I was working with had standardized on APC UPSsA few years ago we did a check on a bunch of UPS systems
installed locally for computer backup in some local city and
company offices - about 30 total.
Of those, about 1/2 had batteries good enough to even fire up
the UPS, and about 1/2 of those that did were very marginal,
such as only having enough capacity for 10 minutes instead of
the rated 30 minutes or so.
Going by that, I would bet that nearly half of the UPS systems
in the country don't work.
Back a few years ago when I was doing this kind of thing for a