What is the method statement for transformer oil filtration?

The method statement for transformer oil filtration involves several key steps. First, the transformer oil is sampled and analyzed for contaminants. Next, the oil is drained from the transformer and filtered using a vacuum filtration system or a centrifugal separator. The filtration process removes moisture, particulate matter, and dissolved gases. Finally, the filtered transformer oil is tested again for quality assurance before being reintroduced into the transformer. Proper safety and environmental protocols must be followed throughout the process.