What treatments are available to maintain or restore silicone oil quality in transformers?

To maintain or restore silicone oil quality, several treatments can be applied. Vacuum dehydration effectively removes moisture, which is critical since water significantly reduces dielectric strength. Degassing processes eliminate dissolved gases that can lead to electrical discharges. Filtration systems remove particulate contaminants that may cause insulation breakdown. Adsorption techniques using materials like activated alumina or molecular sieves extract acidic compounds and polar impurities formed due to oxidation. These treatments restore the oil’s essential properties, ensuring it continues to provide effective insulation and cooling within the transformer.