What are the methods for transformer oil filtration in India?

The methods for transformer oil filtration in India typically include vacuum filtration, centrifugal filtration, and adsorption filtration. Vacuum filtration removes moisture and gases by creating a vacuum that lowers the boiling point of contaminants. Centrifugal filtration utilizes centrifugal force to separate impurities based on density. Adsorption filtration employs materials like activated carbon to capture dissolved contaminants. These methods ensure the transformer oil maintains its insulating properties and extends the lifespan of power transformers.