How To Deal With The Gradual Breakdown Of Epoxy Resin Casing
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When an excessively strong electric field locally acts on epoxy bushing within the organic insulation, a "cone-hole" effect occurs, causing the epoxy resin bushing to gradually break down. However, this hidden danger of epoxy resin cast bushing cannot be detected in the early stages by conventional power frequency withstand voltage and partial discharge tests. There is currently no detection method to detect the breakdown of epoxy bushing manufacturer, so the only way to ensure this for epoxy bushing for transformer is through the manufacturing process.
