- Joined
- Dec 8, 2013
- Messages
- 2,651
There's also the computer and as someone up-thread suggested, a light bulb. So maybe for me 750 watts for five minutes would be enough with the software tweak to write present position to file for the restart. I suppose there's also nothing wrong with skipping all this except the light bulb and going back to the beginning since I'd be cutting air until i got to the place I was when the lights went out.
FWIW, the neatest UPS I ever saw was a system sold to hospitals. It had a motor with alternator windings which when land-power was on, turned a very large flywheel at a synchronous speed. There was a magnetic clutch (very big) and a Cat diesel engine which was kept warm by heating the coolant. the clutch popped on an outage and the engine started close to instantly and picked up the slight drop in flywheel rpm and now the motor generated such that the ripple in power seen in the hospital was low enough not to bother any of their equipment. it worked too.
A No-Break. AT&T used them at their microwave relay sites in the sixties. An elegant design.