----- Original Message ----- > From: "Michael DeMan" <na...@deman.com>
> It is my understanding also that most commercial grade gensets have > built into the ATS logic that when utility power comesback online, > that the transfer back to utility power is coordinated with the ATS > driving the generator until both frequency and phases are within a > user specified range? I don't believe that's actually true, Mike. In a *load transfer* configuration, it's really not all that critical if the power presented to the load skips phase a touch on the transfer; there's a 50-500ms gap in the power anyway, since such transfer switches are required by the NEC to be non-shorting, so they don't electrocute power workers. Cheers, -- jra -- Jay R. Ashworth Baylink j...@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
