Concerns And Indications

1. Concerns and Indications

3. Degradation of polymer ( NCI ) insulators

4. Degradation of polymer (NCI) insulators

6. Physical damaged of components Left string Right string

7. Physical damaged of components Substation - 34kV

9. Crack in the cement (porcelain insulator)

11. Two 500kV lines were built at the same time: “ Monroe-Custer” was being operated at 500 kV right from the beginning “ SnoKing-Tap” started being operated at 230kV and was afterwards changed into 500kV. SnoKing Tap Monroe-Custer Algae Dirt “spikes” Audio Noises (AN)

12. Audio Noises (AN)

14. Sept. 2003 – RFI at FAA Control Tower Radio Interference (RI)

17. Possible faults Corona on the connection between the bushing and the capacitor

18. Possible faults

20. Improper installation

22. Shorted bells

24. Gap discharge

26. Loose hardware

28. Contamination (Ceramic insulators)

29. Contamination

30. Contamination (glass insulators)

32. Corrosion or erosion

33. Corrosion or erosion

35. Broken strands on conductors Primary detection Visible zoom

36. Broken strands on conductors

38. Bad ground connections Substation - 69 kV Pole of wood - 25 kV

39. Bad ground connections

40. The structure interior creates corona external End fitting

41. Transformers 30kV/400V

42. Questions?