A Study of the Cleansing Effect of Precipitation and Wind on Polluted Outdoor High Voltage Glass Cap and Pin Insulator

In this work, the extent of natural cleansing effect rainfall, wind and fog or a combination these on an insulator string were investigated. Results showed that pollution losses progress with time, considerable fraction occurring within 15 minutes testing. While alone played little no role in surface cleansing, it increases by rainfall. The topsides insulators found to be more affected compared underside. Equivalent Salt Deposit Density (ESDD) Non-Soluble (NSDD) measurements carried out. ESDD was higher lower disc irrespective weather condition has been subjected to. NSDD established pattern how impacted position string, demonstrating random nature pollution-cleansing cycle outdoor insulators. Insulator performance assessed high voltage AC tests monitoring partial discharge events using Radio Frequency antennas High Current Transformer (HFCT). Measured output HFCT leakage current decreases uniformly speed at which occurs is indication intensity activity.