What is the process of oil filtration in transformers?

The process of oil filtration in transformers involves the removal of impurities and moisture from transformer oil to enhance its insulating properties and extend the lifespan of the transformer. This is typically achieved using a combination of mechanical filtration and vacuum dehydration techniques. The transformer oil is circulated through filters that capture particulate matter, while vacuum systems help to evaporate and remove dissolved water, ensuring the oil maintains its effectiveness as an insulator.