Increasing transformer longevity by curbing oil deterioration

When transformer ages, carboxylic acids are formed and these acids are absorbed by the paper insulation thus initiating the degradation of the entire system. Ageing may be divided into three types Pyrolysis (due to heat), hydrolysis (due to water) and oxidation, which are all accelerated by heat, by products, contamination, work overload and voltage waves.
Transformer oil deterioration occurs due to overheating, electrical stress, contamination and oxidation. Tiny water droplets and water settled in the bottom of the transformer causes oil deterioration.