Analisis Pengaruh Ukuran Lightning Arrester Metal-Oxide 20 kV terhadap Arus Bocor dengan Variasi Tingkat Polutan, Kelembaban dan Pembasahan

Abstract

Lightning arresters in power systems are available in various sizes that are used in Electrical Distribution Networks. Outdoor use can cause pollutant contamination of the arrester surface, resulting in leakage current. This study examines the effect of pollutant levels with humidity and pollutant levels and rainwater wetting on leakage current in arresters of various sizes and different brands Bosung leakage current has a greater increase in leakage current from 60.1 μA to 737.4 μA while Namsung has an increase in the amount of leakage current from 42.8 μA to 154.5 μA. With the variation of pollutants against humidity, the percentage increase in leakage current of Namsung with light pollutants is 15.45%, medium pollutants are 36.80%, and heavy pollutants are 46.44%. The percentage increase in leakage current of Bosung with light pollutants was 7.99%, medium pollutants 27.12%, and heavy pollutants 64.87%. The highest level of cleaning occurred in moderate pollutant conditions with heavy rain wetting, which decreased by 53.9 μA for Namsung and 55.4 μA for Bosung. With the variation of pollutants against the wetting level, the percentage of cleaning against leakage current in the Namsung lightning arrester is with light pollutants 30.90%, medium pollutants 35.54%, and heavy pollutants 33.54%. The decrease in the percentage of cleaning against leakage current in Bosung lightning arresters is with light pollutants 31.22%, medium pollutants 33.64%, and heavy pollutants 35.10%.