Study on the Consumption Law of Metal Passivator Irgamet 39 in Transformer Oil

In order to optimize the adding scheme of metal passivator, this paper reported the effects of temperature, DBPC (2,6-di-tert- butyl-4-methyl phenol) concentration, DBDS (dibenzyl disulfide) concentration, copper surface area, paper surface area, oil state and copper corrosion degree on the consumption of metal passivator Irgamet 39 in transformer oil. Irgamet 39 concentration in transformer oil was determined by high performance liquid chromatography (HPLC). The results showed that the temperature is a key factor for Irgamet 39 consumption. Irgamet 39 concentration remains stable at low temperature (below 60 °C) and decreases rapidly at high temperature(above 90°C); paper, fresh copper, corroded copper, oil in service and DBDS increases the consumption rate of Irgamet 39; DBPC has little effect on the consumption of Irgamet 39. According to the protective mechanism of Irgamet 39, the transformer oil and insulation paper are important factors in the consumption of Irgamet 39.