what is the aim of online filtration of transformer oil?

The aim of online filtration of transformer oil is to enhance the oil’s quality by removing contaminants such as water, particulate matter, and dissolved gases. This process helps maintain the insulating properties of the oil, prolongs the lifespan of the transformer, and ensures reliable operation. By continuously filtering the oil while the transformer is in service, it minimizes downtime and reduces the risk of failures due to degraded oil quality.