Monoesters for transformer insulating liquid

The development of low viscosity insulating liquids derived from natural esters is conducted in our laboratory. Nine monoesters, i.e., methyl myristate, ethyl isopropyl palmitate, stearate, and stearate were synthesized alcohols saturated fatty acids. Treatments performed to reduce water acid contents improve the oxidation stability monoesters. Some fundamental properties, such as breakdown voltage, kinematic viscosity, density, content, acidity, stability, tested before after treatments. results are evaluated based on international electrotehnical commission (IEC) standard specifications for low-viscosity monoesters esters, IEC 62770. Except all other properties have good compliance with standard. treatments reduced content significantly, but values still slightly higher than that specified by