Oxidation stability enhancement of a blend of mineral and synthetic ester oils.

Mineral oils have been used in transformers for cooling and insulation for many years. Despite their long-time success, mineral oils are facing critiques by the electrical power industry in terms of thermal performance?mineral oils have relatively low flashpoint and fire point and will burn in the event of a fault [1], [2], [3]; environmental performance?mineral oils are less biodegradable, toxic in nature, and hazardous in the soil and water [4]; and risk assessment?mineral oils are imperilling near hospitals, near high rise buildings, and in residential areas. [ABSTRACT FROM PUBLISHER]