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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: BBN (GTE) Suffers another major power problem.
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
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