13
OPM-137/D
GENERATOR PROCEDURES
START-UP
1. With the power take-off drive disengaged, start the
engine which will drive the generator. Run the engine
long enough to warm it up before proceeding, so that it
will run smoothly and achieve full power under
generator load.
2. With the engine idling, engage the power take-off drive.
3. Watch the frequency meter on the generator and slowly
increase engine speed until frequency reaches
approximately 60 Hz. The voltage output of the
generator is controlled by an Automatic Voltage
Regulator (AVR). Before turning on any load, check your
voltage output from the generator using a Volt/OHM
meter. If the voltage is either high or low, adjust the
voltage level by turning the voltage adjustment screw on
the AVR. The AVR is located inside the generator control
cabinet. Once the proper voltage level is set, the AVR
should bring the voltage back to the same levl each time
the unit is started up. But, as a precaution, it should be
checked each time you use the generator. As a quick
check you can plug in a trouble light and check for
normal brightness.
4. With engine and generator running smoothly, switch on
the electrical load while watching the frequency meter
CAUTION: EQUIPMENT DAMAGE
If the load includes motors, turn them on one at a time,
highest starting current motor first, next highest second, etc.
Adjust engine throttle to keep generator output under load
at 60Hz. If the engine is equipped with a governor, it may
automatically adjust the throttle as the load changes and
keep the generator output at the proper level. However,
some governors are not sensitive enough to maintain
proper output under changing loads, and in such cases, the
frequency will have to be monitored closely and manually
adjusted.
SHUTDOWN
1. Switch off electrical load.
2. Reduce Speed of engine driving generator to idle.
3. Disengage power take-off drive and allow generator to
coast to a stop.
WARNING: PERSONAL INJURY
Never try to manually stop the generator. Always let it coast
until it stops.
4. Shut off the engine.
5. Disconnect drive shaft. Power take-off end first, then the
generator end.
