What is the process of transformer oil filter machines and when is it required?

The process of transformer oil filter machines involves the removal of impurities, moisture, and gases from transformer oil to enhance its dielectric strength and extend the lifespan of the transformer. This is typically achieved through techniques such as vacuum dehydration, coalescing filtration, and degassing. Transformer oil filtration is required during maintenance, after oil contamination events, or when oil quality tests indicate degradation, ensuring optimal performance and reliability of the power transformer.