What does a furan analysis presentation of transformer oil usually explain?

A furan analysis presentation typically explains how furans, especially 2 furfural, form when cellulose paper insulation thermally degrades. Because furans dissolve into the oil, measuring them provides an indirect indicator of paper aging and loss of mechanical strength. Presentations usually connect furan concentration trends with loading history, hot spot temperature, and moisture. They also discuss limitations: oil processing can dilute furans, and different paper types and designs can shift correlations. In practice, furan analysis is used alongside DGA, moisture, and thermal models to decide on life extension, refurbishment, or replacement timing.