7
 
 
 
 
 
Scope of work
Rewinding duties are as follows:
  1. Extracting of all old winding.
  2. Cleaning and core loss test for empty stator.
  3. Repair of stator lamination if needed.
  4. Insulation of empty stator by antirust and insulating varnish.
  5. Slot insulation by class H paper.
  6. Registration of old rewinding details and recalculating if not original and registering new details.
  7. Putting new coils of class H enameled double insulation copper whirs.
  8. Making internal connections and tying by class F & H materials.
  9. Tasting of new windings.
  10. Complete immures on Class H Anti oils & Acids oven Varnish.
  11. Oven drying.
  12. Check of bearing tolerance repairing what’s needed for shafts or bearing holders.
  13. Dynamic balancing.
  14. Changing bearing.
  15. Internal paint by insulating varnish and assembly.
  16. Final testing and loading.
  17. External paint.
  18. Registering of used material and man hour for each step.
 
 
Overall maintenance:
  1. Disconnecting of electrical machine.
  2. Cleaning of internal winding.
  3. Complete immures on Class H Anti oils & Acids oven Varnish.
  4. Oven drying.
  5. Check of bearing tolerance repairing whats needed for shafts or bearing holders.
  6. Changing bearing putting needed grease.
  7. Internal paint by insulating varnish and assembly.
  8. Final testing and loading.
  9. External paint.
  10. Registering of used material and man hour for each step.
Materials and suppliers:
  1. Rewinding conductors:
    • Round up to 5 mm diameter are Class H multilayer copper conductors from local market from Egyptian cables company big producer of cables good tested quality.
    • Bigger diameter and plate could be manufactured by the same supplier but we prefer to import for problems of supply time.
    • Plate conductors are enameled strips class H grade2 imported from England ,Sweden, Germany.
  2. Varnish and resins:
    • RES-1-GLAS Banding Tape FIBERTEK.INC Type B0822-FB1.
    • DOLPHON CC-1094 Resin Epoxy.
    • Dolphs BC-352 Thin with T-352 Anti Ferion and oil Backing Varnish.
    • Dolphs BC-346-A Thin with DOLPHS T-100 Clear Backing Varnish.
    • Dolphs ER-44 Class F POLYURETHANE RED INSULATOR external winding paint.
    • German Numex paper.
  3. Work shops:
    • All balancing up to 9 tones are done out by agreement with us to be under our co laudation.
    • Big lathes presses could be used out by the same agreement.
 
 
Equipment:
  1. Lathe.
  2. Drilling machine.
  3. Vertical & Horizontal presses.
  4. Horizontal Saw.
  5. Milling machine.
  6. Air Compressors.
  7. Grinding machine.
  8. Salient Pole coil shaping Machine.
  9. Winding machines.
  10. Chemical cleaning Tank.
  11. Dipping Varnish tanks Class H anti oil & Acids.
  12. Oven curing Varnish.
  13. 16 toms & 10 tons & 5 tons & 3 tons & 2 tons & 1 ton Electrical Cranes (steel frame up to 25 tons).
  14. 10 tons & 5 tons & 3 tons & 2 tons Manual cranes.
  15. Test stand for generators of all frame sizes.
  16. Test stand for DC motors.
  17. Variable load breaks.
  18. AC & DC Welding machines & gas welding.
  19. Sand gun.
  20. Testing instruments for insulation voltage current frequency.
  21. Extractors of different sizes.
  22. Manual tools for different purposes.