3. Oxidation test results
The test oil used in this experiment is Mictrans KS 2301, 1-2 electrical insulating oil (Michang oil, kinematic viscosity: 9.00 cSt @ 40 C, initial TAN value: 0.0055 mg KOH/g, water content: less than 15 ppm, life criteria: TAN less than 0.24).