nanog mailing list archives
RE: BBN (GTE) Suffers another major power problem.
From: Jonah Yokubaitis <barron () texas net>
Date: Sat, 9 Aug 1997 04:10:48 -0500 (CDT)
On Fri, 8 Aug 1997, Charles Sprickman wrote: | |Now at Telehouse NY, (our cabinet being right across from Genuity, btw) |they tell us that all power is coming from an inverter, and there is |enough battery power to keep the entire facility going until the generator |comes online. They even invite you to come out and see them |disconnect the utility co. power during their quarterly tests... This is |primarily a "datacenter" with a much higher count of things that say |"Cisco" on them than those that say "Lucent" or "AT&T". They also claim |they have 3 days of diesel fuel available... How long does it take your generator to kick in? IMO you had _better_ have 4hours of battery plant *MINIMUM* in case your generator does not start. The 4hours is needed so you can get your rollup generator (from a generator contractor) drive to your pop and hooked into your external power tap. We have a 225KW Onan that goes from off to fully operational in 5seconds. Its tested (non-loaded) every monday, and tested with full load every 4th monday. I have seen a _lot_ of generator problems. |So I guess the rule here is, put your 48V stuff at a telco colo, and put |the big AC stuff at a modern datacenter... huh? Every modern datacenter I have seen is running -48VDC. Are you aware of how much electrical interference AC power causes? Your equipment _all_ runs on DC power. The AC power supplies in your equipment is just rectifying the power from AC --> DC (usually 5v or 12v DC). By running AC power backup systems, you are losing ~20-30% effiency due to power conversions. Jonah
Current thread:
- RE: BBN (GTE) Suffers another major power problem. Rodney Joffe (Aug 08)
- RE: BBN (GTE) Suffers another major power problem. Charles Sprickman (Aug 08)
- RE: BBN (GTE) Suffers another major power problem. Jonah Yokubaitis (Aug 09)
- RE: BBN (GTE) Suffers another major power problem. Jonah Yokubaitis (Aug 09)
- <Possible follow-ups>
- Re: BBN (GTE) Suffers another major power problem. wb8foz (Aug 08)
- Re: BBN (GTE) Suffers another major power problem. John Curran (Aug 08)
- Message not available
- Re: BBN (GTE) Suffers another major power problem. Brian Hayes (Aug 08)
- Message not available
- Re: BBN (GTE) Suffers another major power problem. Robert T. Nelson (Aug 08)
- Re: BBN (GTE) Suffers another major power problem. John Hawkinson (Aug 08)
- RE: BBN (GTE) Suffers another major power problem. Charles Sprickman (Aug 08)
- RE: BBN (GTE) Suffers another major power problem. Chris A. Icide (Aug 08)
- RE: BBN (GTE) Suffers another major power problem. Hal Murray (Aug 08)
- Re: BBN (GTE) Suffers another major power problem. William Duncanson (Aug 08)
- Re: BBN (GTE) Suffers another major power problem. Sean M. Doran (Aug 08)