Exciter Field - Kohler 5EOZ Manual

Voltage Regulator Adjustment Procedure
1. Stop the generator set.
2. Turn the remote rheostat, if equipped, to the
midpoint. Turn the voltage and stability pots fully
counterclockwise. Connect the voltmeter to the AC
circuit or an electrical outlet.
3. Start the generator set.
4. Adjust the engine speed to 1800 rpm on 60 Hz units
and 1500 rpm on 50 Hz units.
5. Rotate the voltage adjustment pot clockwise to
increase the voltage or counterclockwise to
decrease the voltage to achieve the desired output
voltage.
6. Rotate the stability pot clockwise until the light
flickers minimally.
7. Readjust the voltage adjustment pot to achieve
the desired output voltage.
1
17
66
33
4
3
16
44
33
15
B1
55
13
14
B2
2 1
12
1. Voltage adjustment potentiometer
2. Stabilizer potentiometer
3. Volt/Hz potentiometer
4. Exciter connections (for reference only)
5. Lead color
6. DC output
7. Exciter
8. Rotor
9. Armature
10. 8-amp fuse
11. AC power input (aux.)
12. Main (2 and 1)
13. Control
14. Stator
15. Sensing
16. Main (3 and 4)
17. Remote rheostat (optional)
Figure 7-5 PowerBoosttIIIE Voltage Regulator
Adjustment
36 Section 7 Generator Troubleshooting
2
3
4
66 44 33 55 -- +
GY R Y O W BK
5
6
7
10
11
9
8. Use the remote rheostat, if equipped, to make final
voltage adjustments.
9. Stop the generator set.

7.5 Exciter Field

DC current from the battery magnetizes the exciter field.
When the exciter armature rotates within the
magnetized exciter field windings, an electrical current
develops within the exciter armature. There will be low
or no generator output if the exciter field is inoperative.
Test the exciter field according to the following
procedure.
Exciter Field Test Procedure
1. Place the start/stop switch in the STOP position.
2. Disconnect the generator set engine starting
battery, negative (--) lead first.
3. Disconnect the P6 and P7 connectors.
4. Check the exciter field resistance by connecting an
ohmmeter across exciter field FP and FN leads.
See Section 1, Specifications, for the resistance
reading of a cold exciter field.
indicates an internal short and a high reading
indicates an open winding. Repair or replace the
exciter field if the ohmmeter readings indicate a
inoperative exciter field. If the resistance test
8
proves inconclusive, perform a megohmmeter test
on the exciter field as described in the next step.
605375
1. Ohmmeter
2. Exciter field
3. Exciter armature
Figure 7-6 Exciter Field Resistance Check
A low reading
1
P7
2
FP FN
3
558857
TP-6053 7/04