Ester Dielectrics: Current Perspectives and Future Challenges

Abstract

In this paper, evolution of ester dielectrics highlighting the significant contributions towards replacement of mineral oils with ester oils was discussed. The citations listed in this survey provide a representative sample to current scenario pertaining to ester dielectrics in transformer insulation technology. Additionally, X-ray diffraction analysis highlighting the degradation rate of insulation paper in the presence of typical dielectric liquids, UV spectroscopy analysis of oils, interfacial tension variations, and diffusion characteristics of insulation paper were experimentally found by simulating accelerated thermal stresses. Furthermore, future challenges and outlook in accommodating ester dielectric liquids for safer and effective transformer technology were also discussed.