Physical Processes in the Contamination Flashover of High Voltage Insulation. Part 2: Appendices E, F, and G

摘要

Measurement of arc tip propagation velocities on the surface of an electrolyte solution (sodium chloride) is described. This study is part of a comprehensive investigation of contamination flashover on high voltage insulators. Experiments were conducted with a photoelectric detector and a streak camera over a wide range of electrolyte conductivities and applied voltages. Experimental details are described and illustrated with diagrams and photographs. The photoelectric detector consists of phototransistors located beneath the electrolyte. It was used to measure arc position at low current levels where the streak camera was not adequate. Part of the data collected appear to be at variance with some presently held theories, but no flaws in the measuring techniques have been found to date, leading to the assumption that the results represent an actual phenomenon. The data collected will be used for theoretical modeling of contamination flashover of high volage power line insulators and should prove useful in understanding the arc propagation mechanism.