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

[Elliott Wolin]

Hi Fernando,

The current plan is to use the EMI line filters you looked at a few 
months ago and thought should work.  If I recall they give something 
like 30 dB noise reduction.  Giles can give you more details.



On 07/29/2013 09:58 AM, Fernando J Barbosa wrote:
> Hi Elliott,
>
> What steps have been taken to address the EMI non-conformance of this 
> UPS?
>
> Best regards,
> Fernando
>
>
> On 7/26/2013 4:23 PM, Elliott Wolin wrote:
>> 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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