EVALUATION OF INSULATION OIL ENVIRONTEMP3 IN DISTRIBUTION TRANSFORMER IN VIET NAM

Abstract

The paper presents a detailed study in reviewing and assessing the practical
properties of transformer vegetable oil, namely Envirotemp FR3 oil, under actual
operating conditions of distribution transformer in Vietnam. The experiments are
performed according to IEC standards, including breakdown voltage test,
dielectric loss, acid value, water-soluble acid-base, water content in oil, flash
point fire, mechanical impurities, dissolved gas content and experiments with
power transformer. Samples of experimental oil are Russian-produced ГK
mineral oil currently used at Hoa Binh Hydropower Plant and Envirotemp FR3 oil.
The final part of paper presents a simulation calculation when two comparable
oils are used in an actual distribution transformer. Experimental and simulation
results allow us to draw some important assessments in verifying the properties
of vegetable oils when applied for the transfomermer in Vietnam.