Semiconducting Glazed Insulators are one of the most efficiently used insulators in contaminant areas. Several electrical and mechan ical tests take place under electrical and mechanical rest s are carried out to foresee the operation of these insulators in regions with high pollution. In attention to plenty of such tests that each one is being tested with a special way and different electrical, mechanical and en vironmental specifications, adding the results up and analyzing them has a special importance. In this paper, comparing the operation of this kind of insulators with conventional porcelain insulators in different artificially polluted conditions and related indexes in determining the operation of these insulators in different conditions of pollution is achieved
