nanog mailing list archives

Re: San Francisco Power Outage


From: "Brandon Galbraith" <brandon.galbraith () gmail com>
Date: Tue, 24 Jul 2007 21:57:09 -0500

On 7/24/07, Owen DeLong <owen () delong com> wrote:



On Jul 24, 2007, at 4:57 PM, Patrick Giagnocavo wrote:

I have no idea what the root cause of today's outage is.  I will be
interested in hearing from any credible source as to any actual details,
but, I'm betting that right now, any such credible source is a bit busy.

Owen


It appears that 365 is using the Hytec Continuous Power System [
http://hitec.pageprocessor.nl/p3.php?RubriekID=2016], which is a motor,
generator, flywheel, clutch, and Diesel engine all on the same shaft. They
don't use batteries.

If the flywheels spent their energy before the generators came online, they
don't have the ability to start the generators up without utility power
(unless they purchased the Dark Start option, which is simply extra
batteries).

-brandon

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