1. Short-circuited stator winding or open-circuit winding
2. The rotor winding is short-circuited or open-circuit winding.
3. Slip-ring short-circuit
4. Internal humidity
5. There is no voltage on the carbon brushes on the slipring. or no direct voltage from the exciter
6. The voltmeter is defective.
7. Loose connection point8. Forgot to adjust the voltage regulator
- – Inspect and replace damaged coils
- - Check the insulation resistance, slipping with a maker
- -Check the resistance of the coil and dry it.
- - Check for faults of switch, check fuse from exciter wire.
- - Check the voltmeter Clean the slip ring and carbon brush.
- - clean and adjust contact firmly
- – Adjust Governor speed control
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