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Electrical insulation performance of compressed gas insulated switchgear (GIS) is adversely affected by metallic particle contaminants with a loss of up to 90% of the gas dielectric strength. Such particles play a crucial role in determining the system insulation integrity. Coating of the inside surface of GIS enclosures with a dielectric material such as epoxy resin can alleviate the adverse effect...
Metallic particle contamination can play a crucial role in compressed gas insulated apparatus. The application of a dielectric coating to an electrode surface should hamper the charging of a metallic particle and hence increase the lift off field at which particle motion commences. The effect of dielectric coatings (polyurethane, epoxy and anodized oxide layers) on the particle lift off field has...
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