The better transfer switches have a contact output to shed AC load to prevent that from happening. They will delay the AC load until the generator is up to speed and below the AC draw. You need to to a little bit of planning to keep both units from running in parallel if the generator isn’t sized for it.
Mark > On Aug 14, 2020, at 11:02 AM, ch...@wbmfg.com wrote: > > I have seen backup generators actually stalled out when attempting to start > two bard AC units on a telecom shelter. That is what happens when a guy goes > cheap on the generator sizing. Sure it would pull the running load just fine. > > I had to develop some kind of circuit to not start the AC until the gen had > been running for a while. I think I also did something to prevent them from > both operating during a power outage. > > From: Mark Radabaugh <> > Sent: Friday, August 14, 2020 8:43 AM > To: AnimalFarm Microwave Users Group <> > Subject: Re: [AFMUG] OT: Geothermal Power Quality > > Most of the new ones are AC Variable speed drives. The drive rectifies the > incoming power into about 350V DC before converting it back to a variable > frequency AC to drive the compressor at whatever speed it needs. Good > drives could care less what the incoming power looks like since all they are > doing is turning it into DC through a big rectifier. Now what feeds back > to the power line from the drive can be really ugly but that’s a different > subject. > > Biggest issue with the older geothermal was the compressor inrush current was > high. You needed a pretty substantial generator to get them started. > > Mark > >> On Aug 14, 2020, at 10:05 AM, Mike Hammett <af...@ics-il.net <>> wrote: >> >> My brother has a geothermal heating\cooling system. The primary reason he >> got a generator was to run the geothermal system. >> >> The people that sold the geothermal system to him told him that he shouldn't >> run the geothermal system on the generator. >> >> Why would this be? >> >> Could he purchase a line conditioner of some sort to clean the power before >> it gets to the geothermal system? >> >> >> >> I'm not sure of the size, but it's one of those Bobcat portable >> welder\generators and he hooks it up to a transfer switch at the meter for >> his farm. >> >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions <http://www.ics-il.com/> >> <https://www.facebook.com/ICSIL> >> <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> >> <https://www.linkedin.com/company/intelligent-computing-solutions> >> <https://twitter.com/ICSIL> >> Midwest Internet Exchange <http://www.midwest-ix.com/> >> <https://www.facebook.com/mdwestix> >> <https://www.linkedin.com/company/midwest-internet-exchange> >> <https://twitter.com/mdwestix> >> The Brothers WISP <http://www.thebrotherswisp.com/> >> <https://www.facebook.com/thebrotherswisp> >> >> >> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> >> -- >> AF mailing list >> AF@af.afmug.com <> >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
