Transformer Life Extension Through Proper Reinhibiting and Preservation of the Oil Insulation

In this paper, the authors wish to discuss the preservation of insulating systems in transformers, oil, as well as in solid insulation. In presenting this topic we want to focus on life extension of a power transformer by recognizing the degradation of the insulating system and detailing the methods used to measure aging and then the processes to accomplish preservation. These techniques apply to both new transformers and in-service units. We will present data from the literature and some of our studies.