I don't think it really applies to the intent, but now that I thunk about it, a friend of mine owns a few gins. A single gin has a bunches of 3 phase large motors. As a result, he had some kind of load shunting system. He didn't know enough about it to explain it but it sounded like huge caps designed to even or the huge start demand the motors. I never actually saw the piece of equipment. His electric bill usually runs in the $40k range in cotton season for each gin.
On Thu, Jul 27, 2017, 9:07 PM Seth Mattinen <[email protected]> wrote: > On 7/27/17 6:51 PM, Colin Stanners wrote: > > Gino, can you say which gear? Most UPSes switch pretty much "instantly" > > (less than one AC cycle, which lasts 16ms) so a PSU that wouldn't last > > one AC cycle must have very questionable engineering. Or assuming that > > you use APC UPSes, you can change the sensitivity setting to switch > > quicker: http://www.apc.com/us/en/faqs/FA156514/ > > > > > Even on the cheapest BackUPS, anything with a decent power supply is > going to have capacitors with its own holdup time that's greater than > any line interactive UPS. I've got some old late 90's vintage BackUPS > units back when they were made out of metal still going strong. > > If the power supply is a linear wall wart though, that could be a problem. > > ~Seth >
