Introduction The measurement of leakage current is used for monitoring the performance of insulators to minimize system outages attrib - utable to pollution [1]. The technique is applied to transmission lines exposed to severe and varying conditions of pollution [2]. According to this technique, preventative maintenance is initi - ated when a critical level of current is reached on polluted insu - lators. However, the technique requires continuous supervision
to analyze the condition of the monitored insulators.