Biodegradability Testing of Transformer Oils: Review

Numerous investigations are being carried out to further examine the features of the ester fluids because of their impressive performance as an alternative to traditional mineral oils in the power transformer. Given that these materials can be used in so many industrial equipment, not to mention the power transformer, environmental impact was a key research focus. Several techniques for evaluating the biodegradability of ester fluids used in electrical transformers have been illustrated in this paper, providing information about their potential as greener substitutes for traditional mineral oil-based insulating fluids. Ester fluids, particularly those made from vegetable oils, have become more popular because of their improved biodegradability and less environmental impact. As a result, the case of interest concerned the methods and rates of ester fluid biodegradation in various environmental settings as well as the impact of ester fluid type on biodegradability. This review emphasizes the necessity for continued research to improve the formulations and environmental management techniques of ester fluids used in transformer applications because of their biodegradability. This is important for developing sustainable power distribution systems.