Furans in transformer oil are byproducts that form during the thermal breakdown of cellulose insulation materials within transformers. Their presence is a significant indicator of insulation degradation and can be indicative of the health of the transformer. Elevated levels of furans point to the aging of the transformer’s insulation system and suggest potential operational issues that, if not addressed, could lead to transformer failure. Monitoring furans in transformer oil is essential for predictive maintenance, as it helps in assessing the condition of both the oil and the insulation, thereby enabling timely intervention and maintenance strategies to ensure the reliability and longevity of transformer operations.

Mineral oil dielectric is used as an insulating and cooling fluid in electrical equipment, such as transformers and capacitors. It provides excellent electrical insulation, preventing electrical discharges between components, and helps dissipate the heat generated during operation, ensuring the equipment functions safely and efficiently.

The main difference between oil type and dry type transformers lies in their cooling and insulation methods:
Oil type transformers use insulating oil to cool and insulate their internal components. The oil circulates to dissipate heat and prevent electrical discharges.
Dry type transformers use air or other gases for cooling and insulation, without any liquid involved. They are typically safer in environments where fire risk is a concern and require less maintenance but may have lower cooling efficiency compared to oil type transformers.