Long-term study of partial discharge and gassing behavior of alternative insulating oils for oil gaps

Abstract

The paper describes the gassing behavior of alternative insulating oils in exposure to partial discharges. Mineral and ester-based oils were applied with partial discharge over a long-term period. The ambition is to verify, how far the mineral oil experience can also be applied to ester-based insulating oils. For this purpose, it is important to recognize the gassing behavior and additionally the dielectric strength- and loss factor- behavior of alternative insulating oils.