I. Made Yulistya Negara, I. Gusti Ngurah Satriyadi Hernanda, Dimas Anton Asfani, Daniar Fahmi, Arief Budi Ksatria, Achmad Djohan Prayogi, Namira Roudlotul Jannah
The breakdown mechanism of polymer insulators is still not completely understood. Visual observation is performed to explain the phenomenon in detail. In this study, visual observation was conducted using a high-speed camera to determine the characteristics of the breakdown development (CBD) of the polymer insulator sheets soaked in mineral oil. The variation used is the electrode shape of the testing tool. There are three types of electrode configurations, including unequal diameter electrodes, equal diameter electrodes, and sphere-plate electrodes based on IEC 600243. The CBD is obtained by image data processing with a millisecond interval. The data is also compared to the results of the electric field distribution on the finite-element method (FEM) simulation. The breakdown voltage (BDV) test between all configurations shows that the highest and lowest BDV values are 47.67 kV (sphere-plate electrodes) and 31.35 kV (unequal diameter electrodes). Furthermore, based on the results of the FEM simulation, the opposite results are shown. The maximum electric field strength based on the FEM simulation results is 15.32 kV/mm (unequal diameter electrodes) and 13.75 kV/mm (sphere-plate electrodes). The unequal diameter electrode has the smallest wide range of distribution, ranging from 0 to 75 mm 2. Although the sphere-plate electrode has the largest wide distribution range, it is ranging from 0 to 250 mm 2. © 2025 IEEE.
Institut Teknologi Sepuluh Nopember, Department of Electrical Engineering, Surabaya, Indonesia; State University Of Surabaya, Department of Electrical Engineering, Surabaya, Indonesia
