Voltage Regulator Adjustment - Kohler 7.5EOR Service

7.6 Voltage Regulator Adjustment

The factory sets the voltage regulator and, under normal
circumstances, the regulator requires no further
adjustment. However, if the voltage regulator has been
replaced or tampered with, or if voltage/frequency
reconnection has been done, readjust the voltage
regulator according to the following procedure. The
following paragraphs and Figure 7-8 and Figure 7-9
identify and describe the voltage regulator.
Note: The voltage regulator is located inside the
generator set controller.
Note: The 7.5 and 10 kW models have the volts/Hz
feature disabled by turning the volts/Hz pot out
(fully counterclockwise).
Voltage Adjustment Potentiometer adjusts the
generator output.
Stability Potentiometer fine tunes the regulator
circuitry to reduce light flicker.
Volts/Hz Potentiometer determines the engine speed
(Hz) at which the generator output begins to drop.
3
4
14
33 44
13
B1
55
11 12
B2
10
2 1
1. Voltage adjustment pot
2. PowerBoost™ IIIE voltage regulator
3. Stabilizer pot
4. Volts/Hz pot
5. Stator/rotor connections (for reference only)
6. DC output
7. Rotor
8. 10-amp fuse
9. AC power input (aux.)
10. Main (2 and 1)
11. Control
12. Stator
13. Sensing
14. Main (3 and 4)
Figure 7-8 PowerBoostt IIIE Voltage Regulator
Connection
TP-6073 4/06
1 3 4
2
5
66 44 33 55 -- +
GY R Y O W BK
6
--
+
8
9
TP-598655
Output
Input
Green
Stab Volts
V/HZ
Sensing
Yellow
6
5
1. Sensing leads
2. Main field (rotor)
3. Stator windings
4. Rectifier
5. Armature
6. Exciter field
7. Voltage regulator power supply leads
Figure 7-9 PowerBoostt V Voltage Regulator
Connection
7
8
Red
7
6
5
4
3
2
1
7
66
F +
AC
AC
AC
F - -
4
B1
3
Section 7 Generator Troubleshooting
1
55
4
3
2
B2
1 2
TP-593656
43