Reignition Voltage and Arc Voltage on Contaminated Insulator Surfaces

Abstract

This paper reports investigations of flashover phenomena on insulator surfaces contaminated by NaCl. It discusses the relations between the reignition and the arc voltages, a high alternating voltage with a 50 Hz power frequency is applied to a contaminated insulator surface. The discharge characteristics in air on insulator surfaces are also discussed. These characteristics were obtained between non-contaminated electrodes, and the results are compared with those obtained with contaminated electrodes. The flashover characteristics in air were found to be very different from those on a contaminated surface. This means that under NaCl contamination, the reignition and the arc voltages are greatly influenced by the behavior of Na ions in discharge space and arc column.