Transformer Filteration exercise is a proven loss prevention technique that should be a neighbourhood of any condition-based predictive maintenance program. Transformer oil is used in oil-field electrical power transformers to cloister, prevent arcing and partial discharge, and scatter the transformer (i.e., act as a coolant).
Therefore, it is sensible to occasionally perform tests on the oil to determine whether it is proficient in pleasing its role as an insulant. Some of the most common transformer oil tests are: Screen Tests, Water Content, Metals-in-Oil, and Polychlorinated biphenyl.