CoC Oral Exam Preparation (Part – 18): Electrical Miscellaneous

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Servicing a motor effected/washed by seawater:

  1. Cut out power supply by circuit breaker & taking out fuse. Mark & disconnect supply wire. Took Megger reading & recorded.
  2. Take out the motor, open up & dismantle. (Make sure marking on both cover & body)
  3. Clean and wash with warm fresh water.( About 180′ F)
  4. Cover by canvas, dry with positive ventilation & 500 watt lamp
  5. Clean with Electro cleaner.
  6. Baking by 500 Watt lamp for few hours.
  7. Take Megger reading. (test stable or constant reading) Apply insulation varnish to the winding while warm.
  8. Baking & taking the Megger.
  9. Reassemble & put back into service.
  10. When test run check sound, ampere & temperature.

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