What is the difference between inhibited and uninhibited transformer oil?

Inhibited vs uninhibited transformer oil refers to the presence or absence of additives that enhance the oil’s stability and performance. Inhibited transformer oil contains chemical additives that help prevent oxidation, improve thermal conductivity, and inhibit the formation of sludge and acids, thereby extending the oil’s lifespan and maintaining the electrical properties of the transformer. Uninhibited transformer oil lacks these additives, making it susceptible to quicker degradation and reduced performance, particularly in environments prone to high temperatures or exposure to air. As a result, inhibited transformer oil is generally preferred for its protective qualities and longer service life, especially in critical applications where transformer reliability is essential.