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Generator Testing & Inspections

MD&A’s generator specialists perform a comprehensive series of tests and inspections on both field and stator components. Machines are subjected to both electrical tests and visual inspections, some of which must be conducted with the generator field removed and others that can be conducted while the field is still in place. The goal of our Generator Specialist is to compile the results from a series of applicable tests that collectively help you make decisions about the necessity and priority of repairs.

Stator Electrical Testing

  1. Winding Copper Resistance Measurements
  2. Insulation Resistance “Megger” Testing
  3. Polarization Index Testing (PI)
  4. DC Leakage Test
  5. DC or AC High Potential Proof Testing
  6. RTD Lead Resistance Measurements
  7. RTD Megger Test
  8. Core Testing
    1. El-Cid
    2. Core Loop Testing
  9. Transposition tests (voltage comparison tests)
  10. Tube to tube resistance tests
  11. Tube to copper resistance tests

Stator Mechanical Tests

  1. Wedge Tightness
  2. Core Tightness
  3. Bore Ring or Belly Band Tightness
  4. Vent Tube Testing
  5. Bump Testing
  6. Stator Cooling HIT skid testing

Field Electrical Inspection

  1. DC Winding Resistance
  2. AC Impedance Test
  3. Insulation Resistance “Megger” Test
  4. Polarization Index (PI)
  5. Pole Balance
  6. Repetitive Surge Oscillograph (RSO)
  7. Visual Inspection

Field Mechanical Testing

  1. Visual Inspection

Check these case studies out: Alstom® Generator Pole to Pole Connector ModificationGas Turbine Major and Generator Test & Balance

Learn more about the other Generator Services that MD&A offers.

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