shortcircuit2
Senior Member
- Location
- South of Bawstin
Inside the larger 3phase inverters are transformers that change the voltage from a 200-220 volt delta to a 208 wye or 480 volt wye for connection to the buildings utility supplied power to feed back to the grid. So at the inverters transformer they don't solidly ground the mid point of the wye side on the output to create a grounded conductor and it is not used to connect to the utility's power system. They just run the 3 phase without the grounded conductor. It is not used or needed. That how it was explained today at Solectria inverter presentation.