Transformer Oil Filtration is a vital maintenance process that removes contaminants like moisture, sludge, and dissolved gases from the oil. This is done using specialized machines that heat the oil under a vacuum. The purpose is to restore the oil's dielectric strength and insulating properties, which degrade over time. By filtering the oil, the risk of electrical faults is significantly reduced, the transformer's lifespan is extended, and its overall efficiency is maintained, preventing costly repairs or replacements.