Re: 365 Main reason for outage report published
Register4Less recently reported a power failure in Montreal where the return of a single cycle from the utility tricked generators into shutting down all three cycles, throwing the data center onto UPS until the batteries died. They did not report make of generator or of the board that failed them. Many generator control systems (and transfer switches) do not monitor all three phases for voltage, and stability (phase sync). Any of these can cause a UPS to use its batteries (without charging) and not fire up the generator. Or conversely, allow a generator to power down. Its happened to lots of people in various places, but I am not going to name-names. DJ
Re: 365 Main reason for outage report published
On Wed, Aug 01, 2007 at 04:50:04PM -0400, J. Oquendo wrote: Sean Donelan wrote: The 365 Main San Francisco data center has published its report concerning the outage on July 24 after a utility problem. http://www.365main.com/status_update.html Other data centers using Hitec backup generators will want to review the 365's report and those with specific Hitec controllers may want to update them. www.infiltrated.net/hitecDDEC.jpg That JPEG is obscene! ;-) Register4Less recently reported a power failure in Montreal where the return of a single cycle from the utility tricked generators into shutting down all three cycles, throwing the data center onto UPS until the batteries died. They did not report make of generator or of the board that failed them. -- Joe Yao Analex Contractor
Re: 365 Main reason for outage report published
Sean Donelan wrote: The 365 Main San Francisco data center has published its report concerning the outage on July 24 after a utility problem. http://www.365main.com/status_update.html Other data centers using Hitec backup generators will want to review the 365's report and those with specific Hitec controllers may want to update them. www.infiltrated.net/hitecDDEC.jpg smime.p7s Description: S/MIME Cryptographic Signature
