Reliability Assessment of Forest Fire on Transmission Lines Polymer Insulator(I)

송전용 폴리머 애자의 산불영향 신뢰성 평가(I)

65% of the Korean peninsula is composed of mountainous area, 97% of which is composed of forest. Therefore, there is high possibility of mountain fire because a lot of potential inflammables such as fallen leaves are stacked on the ground. Moreover, most of the overhead transmission lines in Korea are operated on the mountain. However, there has been very little study for the effect of mountain fire on polymeric insulator for transmission line, though the study is significantly required Therefore, in this study the authors observed the deformation of the housing of the insulator under fire with respect to the ignition time, using artificial ignition testing equipment, and investigated electrical and mechanical characteristics of the insulator by dry withstand voltage test, impulse flashover test and tensile load test.