TP-5737 5/0182 Section 7 Component Testing and Adjustment
Governor Calibration for Paralleling
Generator Sets
Calibration Procedure
1. Place the generator set master switch in the OFF
position. Do not run the generator set.
2. Set the gain potentiometer at 30% and turn the
droop potentiometer completely counterclockwise.
3. Turning the 20-turn potentiometer clockwise
increases idle speed and turning it
counterclockwise decreases idle speed.
4. Turning the 20-turn potentiometer clockwise
increases run speed and turning it
counterclockwise decreases run speed.
5. Place the generator set master switch in the RUN
or TEST position to start the generator set.
6. Slowly turn the gain potentiometer clockwise until
the engine becomes unstable. After the engine
becomes unstable, slowly turn the gain
potentiometer counterclockwise until stable.
Interrupt the governor by momentarily removing
power from the governor. The engine should
recover in 3--5 seconds with diminishing
oscillation.
7. Stop the generator set.
Droop Adjustment Procedure
1. Place the generator set master switch in the RUN
or TEST position to start the generator set.
2. Use the run speed potentiometer to set the engine
rpm to the desired no load speed (frequency) on
the frequency meter.
3. Apply full load to the generator set.
4. While observing the frequency meter, slowly turn
the droop potentiometer clockwise to the desired
droop percentage.
5. Remove full load from the generator set.
6. Using the run speed potentiometer, readjust the
engine rpm to the desired no load speed
(frequency) on the frequency meter.
7. Stop the generator set.
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