Volts Per Hertz (Hz) Adjustments (Droop); Voltage Connections, Single-Phase - Kohler 8.5RES Service

6.7.3 Volts per Hertz (Hz) Adjustments
(Droop)
When the frequency falls below the cut-in frequency
(see Figure 6-13), output voltage is reduced to relieve
the engine. The magnitude of the voltage reduction is
set by the 3P parameter. Monitor engine speed and
output voltage as loads are applied.
If there is excessive droop in engine speed and little
D
droop in voltage, increase the 3P value.
D If there is little engine speed droop but excessive
voltage droop, decrease the 3P value.
Readjust the voltage stability (2P) and voltage (1P)
D
parameters after adjusting the 3P setting, if
necessary. See the instructions in Section NO TAG.
Remember to save your settings.
D
Each step of 3P changes the amount of voltage droop
approximately 0.5% of system voltage for each cycle
(Hz) below the cut-in frequency. See Figure 6-15.
Voltage Droop, % of System Voltage per
3P
0
1
2
3
4
5
6
7
8
9
Figure 6-15 Voltage Droop Adjustments
TP-6196 10/09
Downloaded from www.Manualslib.com
1 Hz Cycle Below Cut- -In Frequency
0
0.5%
1.0%
1.5%
2.0%
2.5%
3.0%
3.5%
4.0%
4.5%
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6.7.4 Voltage Connections,
Single-Phase
Single-phase generator sets are available from the
factory connected for 110/220 volt 50 Hz or 120/240 volt
60 Hz. See Figure 6-16 for the factory connections.
These generator sets are not reconnectable.
LO (Neutral)
Ground
Load
Side
Line
Side
4 3 2 1
Stator Leads
60 Hz
120 volt
L0-L1
L0-L2 120 volt
240 volt
L1-L2
Figure 6-16 110/220 and 120/240 Volt, 3-Wire
Configurations
Section 6 Component Testing and Adjustment
LO
GRD
L2
L1
Factory two-pole
circuit breaker
50 Hz
110 volt
110 volt
220 volt
TP-5867
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