Jahntassa
What, I can have feathers
Premium
join:2006-04-14
Conway, SC
| reply to phoneboy3
Re: What about backup generators
Um..wow. Obviously they had backup generators, but if the generator is feeding the transformer, which then feeds power to the air handlers, then there's no real backup for that.
Backup generators can't help much if someone knocks out the device between the generator and what you're trying to power. |
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jtel
join:2005-06-28
Bristol, RI
| said by Jahntassa  :Um..wow. Obviously they had backup generators, but if the generator is feeding the transformer, which then feeds power to the air handlers, then there's no real backup for that. Backup generators can't help much if someone knocks out the device between the generator and what you're trying to power. Thats not what happened though. They successfully transitioned to back up power and then switched back to utility power w/o knowing that the utility was planning to kill the power again for the safety of rescue personnel. They shut down some servers as a precautionary measure because of repeated cycling of the chillers. My take from the press release is that the chillers aren't fully on the back up system or they wouldn't be cycling repeatedly.
Whats the application for private back up generators that feed utility company transformers? Their generator would most likely connect to a switching unit that was connected to the battery room and the power co. They lose power and it switches to the generator running on battery till the generators come online. |
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marigolds
Gainfully employed, finally
Premium,MVM
join:2002-05-13
Saint Louis, MO
| said by jtel :They shut down some servers as a precautionary measure because of repeated cycling of the chillers. My take from the press release is that the chillers aren't fully on the back up system or they wouldn't be cycling repeatedly. I think it went like this:
Chillers are on main power.
Main power goes off. Generators kick in immediately. Chillers reset.
Power switches from Generators to secondary. Chillers reset.
Secondary power goes off. Generators kick in again. Chillers reset.
Secondary goes back on. Chillers reset.
Main power goes back on. Chillers reset.
After four-five cycles of the chillers reseting like that, they had lost enough cooling capacity for enough time to be concerned.
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