[Halld-controls] Need requirements for UPS power in Hall D

[Elliott Wolin]

Hi,

In the next few weeks Giles will begin design of a UPS power 
distribution system in the hall.  The current plan is to run filtered 
power (according to Fernando's requirements) from the big UPS in the 
counting house down to a distribution center in the hall, then run 
branch circuits where needed.

We believe this is more robust and cost effective compared to placing 
small UPS's all over the place.  The big UPS has plenty of capacity for 
keeping computers and controls equipment running, is extremely reliable, 
routine maintenance is regularly performed through a Facilities 
contract, batteries are regularly checked and replaced, etc.

Tim asked me to collect our total power requirements and determine where 
power is needed.  Dave B and I have a good feeling for what's needed for 
much of the control system, but not for many other systems.  If you need 
reliable UPS power for your system please send me your requirements in 
the next week or two.  If your power requirements are too large we'll 
have to discuss options with our power engineers.

Note that once we run the big lines down from the UPS to the hall it is 
unlikely we'll run more, so we need to get the power requirements 
settled soon.

Thanks,


-- 

				Sincerely,
					Elliott
  

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  Those raised in a morally relative or neutral environment will hold
		    no truths to be self-evident.
				

Elliott Wolin
Staff Physicist, Jefferson Lab
12000 Jefferson Ave
Suite 8 MS 12A1
Newport News, VA 23606
757-269-7365

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