Frankly, Bill, this is what you need:
http://ce.eng.usf.edu/pharos/wonders/Modern/itaipu.html
Yours,
Bob
On Thu, 22 Mar 2007, [log in to unmask] wrote:
> CCP4 bulletin board <[log in to unmask]> wrote on 03/22/2007 04:46:35
> PM:
>
>> Hi Citizens:
>>
>> Does anyone use an uninterruptible power supply for their X-ray
>> generator? Here at UCDIY, the electricity supply is pretty sketchy,
>> and it is hammering our X-ray generator every time someone forgets to
>> feed the hamster or grease his wheel. If so, how much does such a
>> thing cost, and how unpleasant is it to maintain (since at UCDIY, you
>> get to do all your own maintenance)?
>>
>> Thanks in advance.
>>
>> Bill
>
> Hi Bill -
>
> I'm afraid a UPS for that kind of power load may be very expensive. My
> 007HF needs a 20 amp, 200 VAC circuit, so let's say the UPS needs to be
> able to deliver 4 kW of power (you could probably get away with less). If
> you're talking about an older power hog like an RU-H3R, that wants an 85
> amp (!) 200 VAC circuit, so your UPS needs to handle 17 kW load.
>
> Let's assume that you're trying to ride out little glitches (seconds to
> minutes), not long outages. So you don't need huge battery capacity, just
> high wattage.
>
> Here's a couple of sites that might help you - they helped me when I was
> looking for a UPS:
>
> http://www.powerware.com/UPS/selector/SolutionOverview.asp
> http://www.apcc.com/template/size/apc/index.cfm?
> http://www.advizia.com/tripplite/
>
> You'll find that a UPS to run a low-power generator like the 007HF will
> cost you $5000 - $10,000, while something that can handle an RU-H3R looks
> like it'll cost $20k and up. I'm not even sure that all of these systems
> will deliver 3-phase power like the generator needs.
>
> I never considered getting a UPS for my generator, even though our building
> has no backup power and Con Ed also forgets to feed their hamsters
> occasionally. What I did get was a UPS for my cryostream - I figured that
> the data collection can always be restarted if the generator died in the
> middle of the night, but once the crystal is gone, it's gone. I paid less
> than $10k for a UPS that can run my Cryojet for over 15 hours, so even if
> the power goes out in the middle of the night, I can come in and rescue the
> crystal the next day.
>
> Email me if you want more info on my choice of UPS for my cryo.
>
> - Matt
>
> --
> Matthew Franklin , Ph.D.
> Senior Scientist, ImClone Systems
> 180 Varick Street, 6th floor
> New York, NY 10014
> phone:(917)606-4116 fax:(212)645-2054
>
>
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--
========================================================================
Robert M. Sweet E-Dress: [log in to unmask]
Group Leader, PXRR: Macromolecular ^ (that's L
Crystallography Research Resource at NSLS not 1)
http://px.nsls.bnl.gov/
Biology Dept
Brookhaven Nat'l Lab. Phones:
Upton, NY 11973 631 344 3401 (Office)
U.S.A. 631 344 2741 (Facsimile)
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