Electrical field on non-ceramic insulators and its relation to contact angles for constant volume droplets |
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| Institution: | 1. High Voltage Laboratory, Federal University of Itajubá - UNIFEI, Av. BPS, 1303, Pinheirinho, Itajubá, MG 37500-903, Brazil;2. INESC P&D Brasil, Rua José Caballero, 15Bairro Gonzaga, Santos, SP 11055-300, Brazil;1. University of Torino, Department of Chemistry, Via Pietro Giuria 7, 10125 Torino, Italy;2. “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and other Toxic Particulates, Via Pietro Giuria 7, 10125 Torino, Italy;3. Politecnico di Torino, Department of Applied Science and Technology, Institute of Materials Physics and Engineering, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy;1. Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuou-ku, Kumamoto 860-8555, Japan;2. Department of Materials Science and Technology, Tokyo University of Science, 6-3-1 Nijuku, Katsushika-ku, Tokyo 125-8585, Japan;1. Civil and Materials Engineering Department, University of Illinois at Chicago, 842 W. Taylor St., Chicago, IL 60607, USA;2. Nuclear Engineering Division, Argonne National Laboratory, 9700 S Cass Ave, Lemont, IL 60439, USA;1. Department of Electrical Engineering, University of Chile, Av. Tupper 2007, Santiago de Chile, Chile;2. Advanced Mining Technology Center, Av. Tupper 2007, Santiago de Chile, Chile;1. IMEC, Kapeldreef 75, B-3001 Leuven, Belgium;2. KULeuven, Kasteelpark Arenberg 10, B-3001 Leuven, Belgium;3. CHOSE (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy |
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| Abstract: | The presence of water droplets on the surface of insulators provides intensification of the electric field, which are caused by the non-uniform voltage distribution and dielectric properties of the different materials. The degree of Electric field (E-field) intensification at the triple joint, the region where water, the non-ceramic dielectric and the air are in contact, must be carefully analyzed, because under certain conditions, breakdown voltages can be reached, sometimes, under very little or no contamination at all, which can cause the insulator wettability, tracking, flashover and degradation. In this paper, variations of the electrical field over two polymer compounds widely used in the insulator manufacturing industry, Silicone Rubber (SIR) and High Density Polyethylene (HDPE), are analyzed on a 2D geometry with respect to contact angles of constant volume water droplets. The Electrical field is also computed as a function of relative water droplets distances. |
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| Keywords: | Electric field Composite insulation Constant volume Numerical analysis Water droplet High density polyethylene (HDPE) Silicone rubber (SIR) Dielectric stress |
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