There is problem while working. No output voltage

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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The output voltage is abnormally high.

1. Speed ​​is too high, abnormal.
2. Entering too many fields.
3. A set of open-circuit delta-connected stator windings    

• – Adjusted the governor to control the speed less.
• - Adjust the voltage regulator
• - Connect or replace the coil at one new set

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Invalid frequency keep changing

1. The speed is incorrect or keeps changing.
2. Direct input voltage The field is not fixed.    

• – Adjust the speed governor
• -Adjust the exciter drive belt to be stunned.

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High and low output voltage

1. The voltage regulator contacts are dirty.
2.The external field resistance is not tight.    

• – Clean and tighten the contacts.
• - Connect and adjust the contact face firmly.

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The stator got hot at some point.

1. Some phase armature windings are short-circuited.
2. The rotor is not centered.
3. Each coil unbalanced circuit
4. The coil joint is not tight.
5. Wrong connection of phase windings.    

• - Inspect and replace defective coils with new ones.
• - Check the bend of the shaft
• - Balance each coil of the circuit
• - Make the coil joints tight.
• - Connect the phase sequence of the windings correctly.

 

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Magnetic coil overheating

1. The magnetic field coil is short-circuited.
2. The direct current entering the field is too high.
3. Bad heat dissipation    

• – Check and replace the defective coil.
• - Reduce the direct current from the exciter.
• – Clean the parts, remove the obstruction of the cooling way.

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When touching the generator frame and electric shock.

 1. Connect the magnetic field coil at the stator reverse direction.

2.Electrostatic charge or magnetic field coil leak into the ground.

3. The armature coil is leaking to the ground.    

• – Check the polarity sequence and connect the wires in the correct order
• – Check the ground connection of the generator chassis. Clean and reconnect firmly.

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