nunyaWho is John Galt?Premium,MVMReviews:
O Fallon, MO
|reply to warwick |
Re: OT - Simple Disconnect/Isolation Switch
I was asking about the ATS because many have auxiliary contacts. You could accomplish what you need with a simple definite purpose contactor.
The contactor would be wired in a N.O. state between the Aux Source and the load. If the budget allows, and the Aux Source current is low enough, I would spring for a solid state contactor.
The coil would be powered off of utility power. However, once utility power is restored, it usually takes the ATS some time to switch back over. That's where the ATS comes into play. If properly equipped, you could loop the utility fed coil power through the ATS N.C. terminal(s) to keep the Aux Source from coming back online until after the generator goes off line.
E.G., the Aux Source only works when utility power is on line and generator is completely off line. Both conditions would have to be met.
Most decent ATS's have auxiliary contacts available.
If someone refers to herself / himself as a "guru", they probably aren't.
Hmm, thought about that as well. Didn't know those beasts came with aux. contacts. If I'm lucky the logic board will have these contacts in place and maybe I can put the corresponding relay in place.
Really overlooked the fact that the ATS really controls what is what, I.e. the ac could be fine and well however the ATS could still send Gen power to the load (haven't checked the delay).
Will do a more detailed drawing with relays and thingamajigs when I take a look at the transfer switch internals.
Preventing backfeeding* and the destruction of the Generator or PV system is paramount at this point.
Thanks for the help.