Abstract
The phenomenon of broken glass insulators which imported recently and currently being used to work in Iraqi transmission and distribution (132KV, 33KV) lines have greatly increased in recent years, which raised the need to examine the performance of these insulators under the influence of artificial contamination by simulating the climatic prevailing in the country. In this paper we have study the performance of two types of glass insulator which recently imported, the first works in (132KV) transmission systems and the second works in (33KV) distribution system, we have calculated the a mount of sodium chloride equivalent to several levels of salt deposit density in the chemical laboratory of the Nasiriyah thermal power plant station, then we have contamination surfaces of elected insulators to examine with two a mount of sandy loam (25g, 50g) with addition of calculated a mount of sodium chloride equivalent to several levels of equivalent salt deposit density and for several levels of pollution ( light, moderate and high). We have studied the performance of glass insulator elected for examination under the influence of artificial pollution in the high voltage laboratory of shatra technical institute, the calculated result show a serious decline in the value of flashover voltage at moderate and high artificial contamination and relatively good performance at light artificial contamination and also show non-conformity the value of flashover voltage for clean ( new ) insulator with the specification of the manufacturer of insulator. The study recommended a number of recommendations which are necessary to work with to a void the risk of recurrence of the phenomenon of broken glass insulator.
