Mechanical and Electrical Properties of Aluminum Wires of ACSR Conductors due to Forest Fire

Abstract

Forest fire can cause a serious damage to overhead conductors. Therefore, detailed investigation on the changes of mechanical and electrical properties of damaged conductors should be carried out to understand the effect of forest fires on conductors. This is of critical importance in maintaining transmission line safely. This paper examines the changes of mechanical and electrical properties of flame exposed conductor. Tensile strength (TS) decreased according to increase of forest fire temperature and conductivity changed according to forest fire temperature. Specimens were aluminum conductors of aluminium conductor steel reinforced (ACSR) 410, 240, 480 ㎟. In this paper, the electrical and mechanical characteristics of forest fires exposed overhead conductors depending on the diameter of aluminum conductors are presented. It was possible to estimate the degree of deterioration caused by forest fires. The detailed results are given in the paper.

Study on the Decrease in Air Dielectric Strength of DC Voltage According to the Ignition Properties of Combustibles

“…An annual average of 3 transmission line breakdowns occurs due to forest fires. Moreover, in 2000, the entire 345 kV East Sea substation temporarily suspended operations due to a forest fire that occurred in the Donghae and Samcheok districts of Gangwon-do [2,3].…”