Reason for alternator not producing voltage on board ship

Reason for not producing voltage:

  • Loss of residual magnetism.
  • Failure of Diodes.
  • Malfunction of slip rings and brushes.
  • Faulty AVR.
  • Loss of Excitation.

Producing voltage but not producing full voltage:

  • Prime mover RPM is less.
  • Loss of residual magnetism.
  • Faulty AVR.
  • Air gap is too high between starter and rotor winding.
  • Short circuit in field coil.
  • Decrease in pole strength.

2 comments:

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