What is the process of oil filter machine for transformers and when is it required?

The process of an oil filter machine for transformers involves the removal of impurities and moisture from transformer oil, ensuring optimal performance and longevity. This typically includes stages such as pre-filtration, vacuum dehydration, and fine filtration. An oil filter machine is required during routine maintenance, after oil contamination events, or when installing a transformer to ensure the oil meets required dielectric strength and purity standards, thereby preventing failures and enhancing operational efficiency.