Electrical Leakage Current on 22 k V Porcelain Insulators Tested under Saline Solution

Abstract

This paper presents the investigation of electrical leakage current characteristics of 22 k V porcelain insulators such as 2-fin type insulator, 3-fin pin type insulator, post insulator and line post insulator, Experimental works used Rotating Wheel Tester (RWT) to study for the effect of saline (NaCl) conductivity to the resistance properties as well as electrical leakage current of each insulators. Measurement of the electrical leakage current in dry band condition has also been recorded. Analyses of data were done by application of Fast Fourier Transform (FFT) for calculation of the harmonics spectrum. Based on the experiments, it is found that the line post type insulator has the best properties of resistance characteristic as well as lowest amount of electrical leakage current, Hence, for a reduction of the electrical leakage current on insulator, that is, to be installed at the high pollution area, the proper choice to choose is the line post type insulators. However, in the practically, it is necessary to gather more information in order to decide for the most suitable type of specific purpose.