Got a chance to put the generator back together and test run it on a load bank. Overall the results are pretty good.
No load---59 cycles---127.9/125.1/253 volts
5000 watt load---58.4 cycles---118.8/120.1/239.0
10000 watt load---57.3 cycles---117.6/118.4/236.2
I then went back and adjusted the rpm to check voltage at each load and got the following:
5000 watt load---58.8 cycles---121.9/123.2/246.1
10000 watt load---59.0 cycles---120.5/121.7/243.3
There is 1 volt difference in the combined voltage when I tried to maintain 59 cycles, where it is not there when I let the voltage (rpm) drift down under load. Not enough of an engineer to know what is causing that.
Although this is a 15,000 watt generator, it would not see anything in the 10,000 watt range. Doubt the tractor would support much above 12,000 watts either (
L3130). Have a new APC 550 watt ups and it seemed to like it and went online. Have not checked it with the APC 1550 watts yet.
This generator is old, heavy, and seems built well. There is a flywheel affect with varying loads. The main bull gear in the speed increaser is 3" thick,14" in diameter, and is about 50 pounds. It rides through better than a Coleman 6500 watt gas generator I used a while ago. When loads started or stopped, the voltage fluctuated all over the place. The lights went bright and dim a lot. I like most old equipment over new-built to last!
All this is with the heads 180 degrees out. Oh, and with no bearing noise! Good for another 50 or so years....
Comments?
Thanks,
David