What is DBDS in transformer oil and why is it harmful?

DBDS, or dibenzyl disulfide, is a compound that can be present in transformer oil as a byproduct of degradation processes. It is harmful because DBDS can lead to the formation of corrosive acids and other degradation products, which can compromise the insulation properties of the oil and damage transformer components. Monitoring and controlling DBDS levels is crucial to ensure the longevity and reliability of power transformers.