nanog mailing list archives
Re: Backup Power Schemes
From: "Joseph C. Pistritto" <jcp () jcphome com>
Date: Sat, 09 Aug 1997 00:14:57 -0700
At 09:26 PM 8/8/97 -0700, Tony Li wrote:
That takes us back to UPSi on equipment, and generators. Technologies available are: ....Don't forget cogeneration equipment. One would think that local power, UPS, and one flavor of generator should suffice. For the "reasonable". ;-)
Having built a large datacenter recently (PointCast's), I can say that we planned for local power failures that lasted up to about 48 hours. If it's worse than that, you have A Big Problem. We made our system completely automatic since it might have to operate when there was no operator to initiate a transfer (although for the first year we didn't have this). One thing to watch out for is the problem of utility power "coming back" and then dying again. This caused at least one ISP accident since they had insufficient battery power to transfer from Utility->Battery->Generator and back to Utility and then do it again. This is especially a problem if you manually initiate your generators (which is by far the most common situation). These kinds of multiple transfers are actually more common than you think. -jcp-
Tony
-- Joseph C. Pistritto jcp () jcphome com Belmont, California http://www.wp.com/jcp
Current thread:
- Backup Power Schemes Eric Osborne (Aug 08)
- Re: Backup Power Schemes wb8foz (Aug 08)
- Re: Backup Power Schemes Tony Li (Aug 08)
- Re: Backup Power Schemes Joseph C. Pistritto (Aug 09)
- Re: Backup Power Schemes Paul J. Zawada (Aug 11)
- Re: Backup Power Schemes Felix Tang (Aug 09)
- Re: Backup Power Schemes wb8foz (Aug 09)
- Re: Backup Power Schemes Tony Li (Aug 08)
- <Possible follow-ups>
- Re: Backup Power Schemes Jerry Scharf (Aug 09)
- Re: Backup Power Schemes wb8foz (Aug 09)
- Re: Backup Power Schemes Bill McCauley (Aug 11)
- Re: Backup Power Schemes wb8foz (Aug 11)
- Re: Backup Power Schemes Justin W. Newton (Aug 11)
- Re: Backup Power Schemes Nathan Stratton (Aug 11)
- Re: Backup Power Schemes Robert T. Nelson (Aug 12)
- Re: Backup Power Schemes wb8foz (Aug 11)
- Re: Backup Power Schemes wb8foz (Aug 08)