Study on flow electrification hazards with ester oils

Abstract

Mineral oils are commonly used for cooling and electrical insulation purposes in electrical power transformers. Nevertheless, these oils are especially problematic for the environment in the case of burning and leakage. Thanks to their higher fire point and excellent biodegradability, ester oils could be a good candidate to replace mineral oils. Thus, some transformer manufacturers have launched investigations by filling medium power transformers with ester oils and especially natural ester oils.