Quote:
Originally Posted by red-beard
Also, most UPS units are not designed to last more than 15 minutes. The batteries are tiny.
|
I think he is thinking a pass through.
With some UPS's, usually you find in data centers or whole building where clean power is critical, you are always running off the UPS which is providing clean conditioned power on the output side and the utility side keeps the batteries topped off.
One day I will regale you with the tale of a corporate HQ that had a bus size UPS which fed the building and how a worker took a ceiling tile down and placed it on top of the cooling fan which would have the obvious effect of causing it to overheat which in itself would not have been terrible had someone not forgotten to plug the UPS's modem line in preventing it from sending status alerts to the IT staff until it eventually gave up at 3 am and tripped itself to prevent it from burning itself up bringing down everything including the global WAN.
Fun times