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架空输电线路绝缘子污秽程度是影响线路电气绝缘强度的重要因素。绝缘子表面很容易受安装地区环境污染物的影响,以致绝缘子表面积累的污染物受潮时电阻减小,漏泄电流增大,当泄露电流增大到一定的值就会而引起绝缘击穿闪络。绝缘闪络则可能造成事故。
The pollution level of overhead transmission line insulator is an important factor that affects the electrical insulation strength of the line. Insulator surfaces are easily affected by the environmental pollutants in the installation area, so that the pollutants accumulated on the surface of the insulator become less damp and the leakage current increases. When the leakage current increases to a certain value, the insulation breakdown flashover occurs. Insulation flashover may cause an accident.