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As a follow up to yesterday's event, the ITC has this update<br>
<br>
As best we can determine, an accidental discharge by the HVAC
technician caused the Emergency Power-Off (EPO) circuit in the PDU
to fire.(See diagram below.) This update does not reflect any new
events, nor require any additional action on your part, it is
provided for informational purposes only.<br>
<br>
<img src="cid:part1.09060509.05040503@noaa.gov" alt=""><br>
<div class="moz-cite-prefix">On 7/16/2012 6:13 PM, John Unekis
wrote:<br>
</div>
<blockquote cite="mid:50049205.2070105@noaa.gov" type="cite">Update
on the ITC power event.
<br>
<br>
At this time, ITC staff have determined that:
<br>
<br>
1) Street power did not fail
<br>
2) No fuses in the main fuse panel blew
<br>
3) The UPS saw no power events
<br>
4) The generator was never started
<br>
<br>
However, the main PDU for the computer room had its main breaker
fail. Causing most systems at the ITC to suffer a service
interruption.
<br>
<br>
The only visible explanation appears to be that an HVAC technician
was here, and at the time of the event, was working on the main
HVAC unit for the computer room. Something done during that
service probably caused a short or spike that defeated the main
PDU circuit breaker.
<br>
<br>
ITC staff are working diligently to restore the ITC systems to
service. Further updates will be forthcoming as systems are
brought back online.
<br>
<br>
<br>
On 7/16/2012 5:53 PM, John Unekis wrote:
<br>
<blockquote type="cite">My apologies, I am home with the flu, and
was not there to intervene.
<br>
<br>
At approximately 17:30 on 7/16/2012 the ITC has suffered an as
yet undiagnosed power event which caused , at a minimum, the
phones and network connections to fail temporarily.
<br>
<br>
Further diagnosis is being performed and more information will
be provided as it is known.
<br>
</blockquote>
<br>
<br>
</blockquote>
<br>
<br>
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