TP-6907 5/1682 Section 6 Component Testing and Adjustment
6.4.2 Voltage Regulator Average
Vo ltage 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
Kohlerr 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
voltage amplitude matches the Voltage Regulator
Average Voltage Adjustment setpoint.
The Hybrid Voltage Regulator regulates to the average
RMS voltage of all three phases on a three-phase
generator set.
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 6-3 and Figure 6-4.
tp6809
Genset ---->
System
System Voltage:
240 V
System Battery:
12 V
System Phase:
Single
<---- Return
System Freq:
60 Hz
VR Voltage Adj:
240.0V
System Voltage:
240 V
System Freq:
60 Hz
VR Voltage Adj:
240.0V
System Phase:
Single
Press the Up or Down arrow button
to change the setting.
Press the Select button to save the set-
ting and move to the next screen.
Figure 6-4 Voltage Regulator Voltage Adjustment Using RDC2 Controller4 Menus and Keypad
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