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What is the benefit of "Vacuum Pressure Impregnation" on a transformer?

All HPS transformers and reactors are vacuum impregnated with a “Polyester Resin” and oven cured which seals the surface. Impregnating the entire unit provides a strong mechanical bond and offers protection from environmental conditions.

Using a vacuum during this process eliminate moisture and provides deeper penetration of insulation into transformer cavities.

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