Kohler 20RESL Manuale di installazione - Pagina 34
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1.15.1 Voltage Adjustment
Note: Refer to the flowchart in Figure 1-31 during the
following procedure.
Voltage Adjustment Procedure
1. With the generator set off, connect a digital
multimeter to the output leads or an electrical outlet
on the load side of the generator set. Set the meter
to measure AC voltage.
2. Start the generator set by pressing the RUN button
on the RDC controller.
3. Use the RDC controller to adjust the voltage
(parameter 1P) until the output voltage reaches the
desired value. Refer to the flowchart in Figure 1-31
for instructions to adjust the output voltage. See
Figure 1-32 for the approximate change in voltage
per step.
Measured
ADC
Voltage, VAC
Display
85--180
1P00--99
180--360
1P00--99
Figure 1-32 Voltage Adjustment (approximate)
4. Adjust the voltage stability (gain, parameter 2P) to
minimize light flicker.
5. Readjust the voltage, if necessary.
6. Save settings. See Figure 1-31.
7. Stop the generator set.
Note: Volts-per-hertz parameter 3P can be adjusted
only by a Kohlerr authorized distributor/dealer
using a personal computer and Kohlerr
SiteTecht software.
34
Section 1 Installation
Voltage Change per
Step, VAC
Coarse
Fine
5
0.5
7
0.7
1.15.2 Frequency Adjustment
The engine speed determines the generator output
frequency; 60 Hz units operate at 3600 rpm and 50 Hz
units run at 3000 rpm. Adjust the engine governor
speed and gain to set the output frequency and stability
using the following procedure.
Note: Refer to the flowchart in Figure 1-31 during the
following procedure.
Frequency Adjustment Procedure
Note: Refer to the flowchart in Figure 1-31 during the
following procedure.
1. Attach a frequency meter to the AC output leads or
an electrical outlet on the load side of the generator
set.
2. Start and run the generator set until it reaches
normal operating temperature (at least 10 minutes).
3. Adjust engine governor speed (parameter 4P) to
obtain a frequency reading of 60 Hz (or 50 Hz if
appropriate). See Figure 1-33.
4. Check stability with the generator set running and
with no load applied. If the generator set speed is
unstable, hunts, or surges, adjust the engine
governor gain, parameter 5P, until the generator
set becomes stable with no hunting or surging.
(Increasing the gain slows the governor response.)
5. Check the frequency reading. Repeat steps 3 and
4 if necessary to obtain the rated frequency and
stable operation.
6. Save settings. See Figure 1-31.
60 Hz
4P
RPM
Frequency
Setting
00
3420
50
3600
99
3776
Figure 1-33 Engine Speed Settings
50 Hz
RPM
Frequency
57
2850
47.5
60
3000
50
63
3150
52.5
TP-6733 8/11