A comparative analysis of different dielectric fluids for cable sealing ends

A growing interest is observed in research to explore biodegradable alternative fluids as liquid insulation in high voltage equipment, due to their dielectric strength, environmental friendliness and enhanced fire safety. The present report deals with comparing the performance of possible alternative oils with silicone oil, which is typically used in the cable sealing ends. A detailed study of various physicochemical aspects and the impact of moisture ingress on these properties of mineral oil, natural and synthetic ester oil, and silicone oil is conducted. This work aims to identify the best liquid dielectric suitable for its application for cable terminations.