Voltage Regulator; Voltage Regulator And Calibration Specifications; Voltage Regulator Adjustments - Kohler 6EKOD Service Manual

8.10 Voltage Regulator

WARNING
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
are in place.
Short circuits. Hazardous voltage/current can cause
severe injury or death. Short circuits can cause bodily injury
and/or equipment damage.
connections with tools or jewelry while making adjustments or
repairs. Remove all jewelry before servicing the equipment.
Grounding electrical equipment. Hazardous voltage can
cause severe injury or death. Electrocution is possible
whenever electricity is present. Ensure you comply with all
applicable codes and standards.
generator set, transfer switch, and related equipment and
electrical circuits. Turn off the main circuit breakers of all
power sources before servicing the equipment. Never contact
electrical leads or appliances when standing in water or on wet
ground because these conditions increase the risk of
electrocution.
8.10.1 Voltage Regulator and Calibration
Specifications
The Advanced Digital Control IId (ADC IId) has a voltage
regulation function that is internal to the processor. This
means that no external voltage regulator is necessary.
The voltage regulation of the controller uses root mean
square (rms) sensing for fast response to changes in
indicated and regulated voltages resulting in excellent
regulation accuracy.
TP-6774 2/14a
Moving parts.
Do not contact electrical
Electrically ground the

8.10.2 Voltage Regulator Adjustments

The descriptions of the voltage regulator adjustments
and features follow.
Voltage Adjustment. The voltage adjustment allows
the user to enter the desired generator set output level.
This regulated level setting is the average of the three
line-to-line voltages in three-phase configurations or
L1-to-L2 in single phase configurations.
Submenus display the individual line-to-line voltages.
These voltages are for reference only and are relevant
in unbalanced load conditions.
setpoint can be changed to accommodate an important
phase in an unbalanced system.
Underfrequency Unload Frequency Setpoint. This
adjustment affects the voltage droop (volts per Hz) when
load is applied and underfrequency occurs.
underfrequency unload setting defines the setpoint
where underfrequency starts. Any frequency below the
setpoint causes the voltage to drop thus reducing the
load allowing the engine speed to recover according to
the underfrequency unload slope setting.
Engine speed recovery depends upon characteristics
such as engine make, fuel type, load types, and
operating conditions.
setting should match the engine speed recovery
characteristics for the application.
Underfrequency Unload Slope.
determines how much the voltage drops during an
underfrequency condition. Typically, applying a large
electrical load causes a dip in engine speed and
frequency. The voltage regulator reduces voltage,
allowing engine speed recovery.
setting determines the amount of voltage drop.
Regulator Gain. Regulator gain refers to the gain of the
control system. Generally, the higher the gain the faster
the system responds to changes and the lower the gain,
the more stable the system.
If the voltage is slow to recover when loads are applied
or removed, increase the regulator gain. If the voltage is
unstable, decrease the regulator gain.
Section 8 Component Testing and Adjustment
The voltage adjust
The underfrequency unload
This setting
The volts-per-Hz
The
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