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TP-6335 9/04 Reconnection/Adjustments 29
8.2.3 Adjusting the Voltage, Gain, and
Volts/Hz
After setting the system voltage, check the output
voltage and adjust, if necessary, using the following
procedures. Follow the instructions in Figure 8-6 to
adjust the voltage, gain, and volts/Hz while the engine is
running. An x in the Display column in Figure 8-6
indicates a number from 0 to 9. Use the up arrow to
increase a setting or the down arrow to decrease the
setting.
Note: Save your settings before exiting the
configuration mode.
Pressing the Select button when SAVE is displayed
returns to the first parameter, voltage adjust (1P).
Voltagechanges are lost ifthey arenot savedbefore the
generator set shuts down. The generator set continues
to run with the new settings until it shuts down but then
reverts to the previous settings at the next startup if the
changes have not been saved.
Note: A digital multimeter is required for these
adjustments.
8.2.4 Voltage Adjustment
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
Movingrotor.
WARNING
Short circuits. Hazardous voltage/current can cause
severeinjury or death. Short circuits can cause bodily injury
and/or equipment damage. Do not contact electrical
connectionswith 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. Open the main circuit
breakersofall powersources before servicing theequipment.
Configure the installation to electrically ground the generator
set, transfer switch, and related equipment and electrical
circuitstocomplywithapplicablecodesandstandards. Never
contact electrical leads or appliances when standing in water
oronwetgroundbecausetheseconditionsincreasetheriskof
electrocution.
Voltage Adjustment Procedure
Note: Refer to Figure 8-6 and Figure 8-7 for
instructions to adjust the voltage using the
ADC 2100.
1. With the generator set off, connect a digital
multimeter to the output leadsor an electrical outlet
on the load side of the generator set. Set the meter
to measure AC voltage.
2. Start the generator set by moving the generatorset
master switch to the RUN position.
3. Use the ADC controller to adjust the voltage
(parameter 1P) until the outputvoltage reachesthe
desired value. See Figure 8-5 for the approximate
change in voltage per step in parameter 1P.
Measured
V
l
V
A
C
Voltage Change per Step, VAC
Voltage, VAC
Coarse Adjust Fine Adjust
85--132 5 0.5
180--251 7 0.7
Figure 8-5 Voltage Adjustment
4. Adjust the voltage stability (gain, parameter 2P) to
minimize light flicker.
5. Readjust the voltage, if necessary.
6. Readjust the voltage stability (gain, parameter 2P),
if necessary.
7. Readjust the voltage (parameter 1P), if necessary.
8. Stop the generator set.