How is transformer oil sample analysis performed and what information does it provide?

Transformer oil sample analysis is performed by collecting oil samples from the transformer and subjecting them to various tests, including dissolved gas analysis (DGA), moisture content measurement, and furan analysis. These tests provide critical information about the transformer’s condition, such as the presence of gases indicating overheating or arcing, moisture levels that can affect insulation, and the degradation of insulation materials. This analysis helps in assessing the health and reliability of the transformer.