© 2019 Power-Tronics, Inc.
15
Application Troubleshooting
Problem:
Possible Cause
No Voltage
1 3 5 7 9 11 13 15 20 21
Pulsating Voltage
4 5 6 12 16
Flickering Voltage
4 6 7 14 21 22
High Voltage
6 7 8 9 12 13 17 18 20 21 22
Voltage Drop on Load
5 8 10 12 16 23 24
Low Voltage
5 8 12 13
Poor Voltage Regulation
2 4 10 12 13 16 23 24
No Voltage Control
13 19 20 21 22 23 24
Possible Causes:
1. Residual input voltage to the exciter is below 3.5vac, main or battery fuses blown, dead battery.
2. Unbalanced generator load.
3. Open exciter field or defective generator.
4. Non-linear load or defective connection in exciter field.
5. Open diode in exciter or shorted rotor in generator.
6. Loose component in voltage regulator.
7. Loose wiring connections.
8. Input voltage to regulator is too low.
9. Exciter field is grounded.
10. Non-linear load or wrong selection for regulator hookup.
11. Exciter fields are reversed.
12. Wrong selection of regulator wiring configuration.
13. Defective voltage regulator.
14. SCR or Inverter drive effecting generator waveform.
15. Regulator needs battery flashing circuit.
16. Isolation transformer is too small.
17. Isolation transformer is needed.
18. Exciter fields are not isolated from other circuits.
19. Input and field circuit are being fed by a common cable or conduit.
20. Incorrect hookup or wiring.
21. Poor brush contact to commutator or sliprings.
22. Damaged, pitted, or grooved slip ring surface.
23. Current transformer has reversed polarity or is not shorted during non-parallel operation.
24. Input to regulator is from an auxiliary winding and not the generator main stator.
