ABSTRACT

HERMAN NAUWIR The Effects of Non-Soluble Pollutant on the Performance of 20 kV Isolator, a Case Study on Distribution Substations of PT. Pabrik Semen Tonasa II, South Sulawesi, Indonesia (supervised by H.Muh.Arief and Salama Manjang)

This research is presenting the experimental results of the effects of non-soluble pollutant from industrial and coastal pollution on the performance of outdoor ceramic insulators. The case of distribution substations of PT Pabrik Semen Tonasa II in South Sulawesi, Indonesia, is taken into consideration. The results include the chemical analysis (the composition of solution elements and the conductivity of the solution), physical analysis (contact angle and conductivity of the element’s surface) and electrical analysis (leakage current on the element’s surface and the insulator’s flash-over voltage). 

Apparently, the insulator’s flashover voltage is not only affected by the soluble pollutant (indicated by the ESDD, or Equivalent Salt Deposit Density, of such as ionic salt), but also by non-soluble pollutant (indicated by the NSDD, or Non-Soluble Deposit Density, of such as silicon dioxide, and the kaolin as a non-ionic solid part).  The flashover voltage decreases with the increasing NSDD, and the conductivity of the insulator’s surface decreases as shown by the water contact angle.