705. Point of Connection.
(D) Utility-Interactive Inverters.
Nor did he give any indication that the load is connected to both sources. I would have expected that to be unusual enough to mention.
The premise of his question is 705 and quoted in part from D “Where distribution equipment including switchboards and panelboards is fed simultaneously by a primary source(s) of electricity and one or more utility-interactive inverters,”
Until he says otherwise my assumption is both loads have simultaneous supply from both solar and utility. it could be possible the second load is only solar supplied but he hasn't said that.
Especially as that load appears to be at a different voltage from the building 2 service voltage.At least that is how I read it.
We have two utility interactive inverters feeding step up transformer (208p/13.8kw s) then (due to distance) step down transformer
I’m not seeing it that way I see the reason to step up the voltage is distance, my thought was he is stepping down the voltage the same as the normal utility voltage
He didn't say that. If that is the problem you see (one building supplied by two feeders), then yes there are some code issues pertaining to that and some potential dangers. But he neither said that, nor do such dangers have anything whatsoever to do with the inverters and whether they would shut down.
I am talking about both loads being supplied simultaneously by a primary source(s) and solar . he is tapping the feeder between where he stepped up output voltage from the inverters and the step down transformer to building one. He is taking the tap to a second step down transformer to supply a second load (building) that I think is simultaneously supplied by utility power.
Both buildings being served by normal utility power, How would you get the solar system to shut down when one of the buildings lost utility power? In my way of thinking your design is dangerous!!!
I never once said the power loss was from the solar supply. If both loads are utility power supplied and the inverter at the origin of the first step up transformer, will still see utility power if only one load is disconnected from utility power.
(due to distance) step down transformer then feeding load side of a circuit breaker inside a switchgear
He is talking about making load side connections, load side connections implies a utility power present at the load. If one of the simultaneously supplied loads has a loss of utility power the inverters will still see utility power from the other load
And as said it is possible the second load is only solar, though i did not read his post that way, I do not have the same concerns.