The Islatran looks like it might just do the job. Presumably very low loss, as the inductors are high impedance at the spike frequencies, not the line frequency. Many layers of protection. Looks like a good find!
Yeah, I know. But I'm charged with finding solutions in an almost zero budget. :-) The large CVT at the generator was something I gave a thought to, but again, the generator would never run economically, as when all the a/c is off and we have just lights and computers running. The CVT would be loading the generator when it had no load or miniscule load on its output.
Today, a Seasonic power supply arrived, and I installed it in the PC that was rebooting when the UPS switches over on medium sensitivity setting. I did repetitive testing of interrupting power to the UPS and the PC just kept running like nothing was happening to the power. So the large Seasonic supply has enough storage capacity to holdover through the switchover.
Another nice benefit is that the current draw dropped by over 40%, as measured on a variac/current meter test set that we used to use for measuring power supplies at Penril/Technipower Corp years ago. Since part of my objective is to cut our electric costs, the switch to Seasonic S series PSUs will go a long way to realizing our goal of energy efficiency. (Seasonic is a PF-corrected PSU with a very high eff. rating, approaching
83%) It also runs cool. The old supply could be used as a space heater. :-)I am going to order another Seasonic S series supply for the other graphics workstation. If cutting 8 amperes down to 4.5 amperes will save us money, then the price is worth the investment.
-- Best Regards,
Mark A. Weiss, P.E.