de Santos, Héctor

R&D Engineer, La Granja Insulators, Spain

de Santos, Héctor

R&D Engineer, La Granja Insulators, Spain

Biography

Dimensioning Silicone-Coated Glass Insulators for Polluted Environments

Mr. de Santos received his Electrical Engineering Degree from the Technical University of Madrid and later completed his M.Sc. in Industrial Engineering. He is currently concluding the Ph.D. degree at the ICAI Engineering School of the Comillas Pontifical University. After working for different Spanish utilities as project engineer in the field of power lines, he joined Verescence La Granja Insulators as approvals and process development engineer. He is Sr. Member of IEEE, member of CIGRÉ and IEC and contributes to several international Technical Committees and Working Groups within these bodies.

Application of RTV silicone coatings to glass insulators has grown as utilities look to keep the properties of toughened glass such as mechanical reliability and ease of inspection while enhancing pollution performance. But the hydrophobicity transfer properties of coatings is a complex topic and the most common practice is to dimension with the same USCD as uncoated glass. This presentation outlines a probabilistic approach to dimension coated glass insulators in polluted environments based on field leakage current monitoring, quick-flashover laboratory tests and the relative performance of coated and uncoated glass. It will also explain how this can help evaluate flashover risk and quantify the benefit of hydrophobicity.

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