Voltage Regulator Average Voltage Adjustment - Kohler Power Systems 8RESV Service Manual

5.9.1 Voltage Regulator Average
Voltage Adjustment
Voltage regulation is performed by the controller. The
controller monitors generator output voltage and
adjusts the excitation current to the rotor.
Excitation current control is performed by the patented
Kohler Hybrid Voltage Regulator. This regulator
consists of a fast-reacting analog inner loop and a
slower digital outer loop. The inner loop regulates the
average output voltage to a setpoint which is controlled
by the outer loop, allowing the voltage to recover very
quickly during transient conditions. The outer loop
measures the RMS magnitude of the voltage and
adjusts the setpoint for the inner loop until the RMS
Genset ---->
System
Figure 5-13 Voltage Regulator Voltage Adjustment Using RDC2 Controller Menus and Keypad
84 Section 5 Component Testing and Adjustment
System Voltage:
240 V
System Freq:
60 Hz
VR Voltage Adj:
240.0V
System Phase:
Single
System Battery:
12 V
<---- Return
voltage amplitude matches the Voltage Regulator
Average Voltage Adjustment setpoint.
The hybrid regulator should require no voltage
adjustment, as it regulates the RMS output voltage to
the configured output voltage. The Voltage Regulator
Average Voltage Adjustment setpoint may require
alteration to more closely match the utility voltage at a
particular location or to compensate for voltage drop on
wiring between the generator and the ATS.
The Voltage Regulator Average Voltage Adjustment
can be adjusted from the Voltage Regulator menu on
the RDC2 controller, or adjusted using SiteTech. See
Figure 5-11 and Figure 5-13.
System Voltage:
240 V
System Freq:
60 Hz
Press the Up or Down arrow button
VR Voltage Adj:
to change the setting.
240.0V
Press the Select button to save the set-
ting and move to the next screen.
System Phase:
Single
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