Performance of HTV-SiR as outdoor insulation in Pakistan (laboratory simulation)

The use of organic materials in making polymeric insulators has many advantages. However, it also has a draw back that organic compounds degrade in outdoor environment by many factors. The major issue is that how long they will perform satisfactorily before the end of their useful life. This paper present the result of multistress lab aging on HTV SiR insulators. The environment used was of Islamabad, Pakistan. The day/night & summer/winter cycles were made. An HTV-SiR insulator was installed in multistress aging chamber and energized. UV radiation, rain, and fog were applied. The insulator was aged for nine years. Leakage current, hydrophobicity was monitored at regular intervals. The samples of rubber from energized and un energized ends were cut at the end of each year. These samples were analyzed using FTIR. The results from all techniques were incorporated together to estimate the life of these insulators in environment of Islamabad.