Woodward 9907-252, Installation And Operation Manual, Page: 22 / 36

Load Sharing Module Manual 02035
18 Woodward
Setting Droop for an Infinite Bus
1. With the generator not paralleled, adjust the speed above rated frequency
by the percent droop required (set engine at 63 Hz for 5 percent droop on a
60 Hz system).
2. Mark the speed setting potentiometer position or measure dc voltage on
TB27(+) and TB26(–), and re-adjust the engine speed for rated frequency.
3. Turn the DROOP potentiometer fully clockwise for maximum droop.
4. Synchronize the generator with the bus and parallel it with the bus.
5. Increase the speed setting potentiometer to the position marked in step 2,
increasing load.
6. Slowly adjust the DROOP potentiometer counterclockwise, decreasing
droop, until 100 percent load is obtained.
If it is necessary to set the droop without pulling 100 percent load, set the engine
speed accordingly for the desired percent of droop at the load to be pulled. For
example: Five percent droop at 50 percent load will require a no load rated speed
of 61.5 Hz, not 63 Hz, on a 60 Hz system.