TP-6805 8/15108 Section 6 Component Testing and Adjustment
6.9.2 Engine Speed Adjustment for
Governor
The Engine Speed Adjustment parameter in the Engine
Speed Governor group in SiteTech can be adjusted
while the generator set is running.
Note: The Engine Speed Adjustment parameter must
be left at the default value (50) for the generator to
operate at the correct frequency. If this parameter
is changed during troubleshooting and testing,
make sure to return it to the default setting before
disconnecting SiteTech from the generator
controller.
The Engine Speed Adjustment setting can be adjusted
from 0 to 99 for test purposes. Setting the Engine Speed
Adjustment to 0 will make the governor regulate speed
to 100 RPM slower than the rated speed. Setting the
Engine Speed Adjustment to 99 will make the governor
regulate speed to 98 RPM faster than the rated speed
setting.
Changing the Engine Speed Adjustment setting will
change the engine speed according to the following
formula:
(System Frequency x 60) + ((Setting -- 50) x 2) = RPM
Examples:
System frequency of 60 Hz, changing the setting to 40:
(60 x 60) + ((40 -- 50) x 2) = 3580 RPM
System frequency of 50 Hz, changing the setting to 99:
(50 x 60) + ((99 -- 50) x 2) = 3098 RPM
6.9.3 Advanced Speed Control
Note: Do not adjust the Advanced Speed Control
settings unless instructed to do so by the Kohler
Generator Service Department.
The four parameters under Advanced Speed Control
also permit adjustment of the governor function, but
have the potential of dramatically affecting the load
transient performance of the generator. They are set in
the factory and are tested to comply with factory
performance standards. They should never be changed
from the factory settings except under the direction of
factory personnel.
SiteTech Group Parameter Units
Adjustment
Range
Default
Setting
Engine Speed Governor Engine Speed Adjustment 0--99 50
Engine Speed Governor Engine Speed Gain Adjustment 35--65 50
Genset Personality Profile Engine Run Speed [ RPM 1000 -- 3900 3600
Genset System configuration Genset System Frequency Hz 50/60 60.0
[ Engine Run Speed is set automatically when the System Frequency is set.
Figure 6-18 Engine Speed and Frequency Parameters in SiteTech
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