[Halla_running] Update on Power to the CH [ was: Counting house computers will be down ]

[Brad Sawatzky]

Hi all,

Just a quick update on the power situation.

Upshot:
  Emergency power will dropping out again tomorrow (Friday) morning.
  The adaq and cdaq machines should be back up noon on Friday and should
  stay up.


What's happening:
  The emergency circuit that is currently providing power to the Hall A
  racks and some IT switches is currently up, /however/ it will be going
  down again tomorrow sometime after 6am and will be back before noon.

  During that time Facilities will wire in a few more power sockets off
  the emergency circuit to supply power to the Hall C computer racks.

  After that both Hall A and C should have stable power off the
  emergency line for about 1.5--2 weeks.  Note that the generator
  that normally backs the emergency circuit is /not/ in the loop
  right now (see Walt's message below.)

  At some point after the generator is repaired the emergency power
  circuit will need to be shut down in order to hook the generator back
  into the circuit.  _Hopefully_ we can defer that interruption until
  after other non-emergency circuits are re-energized.  That means we
  should /not/ have to shut down the computers again.

  Either way, we (Walt, Ole, Brad, Bryan, etc) should be notified before
  any future interruptions so we can plan for them and minimize
  downtime.

-- Brad

On Wed, 10 Sep 2014, Walt Akers / JLAB wrote:

> All:
> 
> I've put together a draft plan/outline of events and sent
> it to Rusty for discussion.  I'd like to have them check it
> for factual accuracy before I send it out, but we are
> close to a solution for the ongoing power issues.
> 
> Regarding emergency power, I did discuss the situation
> briefly with Brad this evening,  and I can give you the
> same information I shared with him.
> 
> 1) Transformer T-8 (the one that is backed-up by the
> generator) is back online and fully operational.
> 
> 2) The generator is NOT running at this time.
> 
> 3) Facilities is contracting to have the generator rebuilt
> and exhaustively tested immediately.
> 
> 4) In the event that a tropical storm or hurricane is projected
> before the generator is repaired, Facilities will procure a
> temporary generator for the End Station Loop and connect
> it before the storm arrives. (This connection will require
> a half day outage to connect and another to disconnect - so
> it is not the best option unless an outage is expected).
> 
> Just today we have implemented several decisions that
> should minimize unexpected and unplanned outages, all
> of which are detailed in the draft document.
> 
> For now, I would encourage you to bring the systems
> back online on the existing power and I will provide you
> as much other information as possible in the very near
> future.
> 
> Walt