hey E-man, the setup you are inquiring about is a external wye connected motor, not a delta connected setup. It is basically a modified across the line starter with the modification being the insertion of the grid resistors to limit inrush current so that you could have a smaller kva rating of the incoming power, not to mention lower rated fuses and smaller gauge wiring. as far as the connections go, it depends on the Input voltage High, or Low. For High voltage, the connections are L1-t1, L2-t2, L3-t3, tie together 10-11-12, and 4-7, 5-8, 6-9. I had one of these grid resistors insulation go bad, and when the generator started, the grid resistor was shooting hot chunks of grid across the machine room, very scary. It cost to much to redo the grids, so we ended up putting in a Soft starter. I could not use any of the siemens products at the time, since this was a 75 horsepower across the line motor, we had to use one of the ABB PST series soft starters, It worked great. It really is intimidating when you start working on generators this big, it took me a little while to get it all working, as i was pretty nervous turning it on the first time.
