Purification Treatment of Transformer Oil
Transformer oil filtration is a necessary process for treating and purifying insulating oil, primarily used to remove sludge and moisture from the oil.
Advantages of Transformer Oil Filtration
Improve the insulation performance of insulating oil
Extend the service life of transformers
Reduce the occurrence of transformer failures
High-quality equipment brings good investment returns
Consequences of Not Performing Insulation Oil Filtration
Arc phenomenon: generating an arc, causing system failure
Overheating: transformer oil temperature too high
Corona discharge: electrical discharge caused by fluid ionization
Decreased insulation strength: insulation performance of transformer oil decreases
Insulation Oil Quality Testing Projects
Dielectric strength (breakdown voltage, BDV)
Moisture content
Neutralization value
Interfacial tension
Color and appearance
Oxidation stability test
Electrical resistivity (specific resistance)
Flash point
Pour point
Viscosity
Sludge testing
Dissolved gas analysis (DGA)
Insulation Oil Filtration Process
Heating Phase
Raise the oil temperature to 65 °C to provide latent heat for separating water and gas. Heating reduces oil viscosity, making filtration smoother.
Removal of Impurities and Sludge
Two main methods are available:
Filter cartridge filtration: Use filter cartridges (such as edge or deep filter cartridges) for filtration. Modern equipment often uses filter cartridges instead of traditional paper filters.
Centrifugal separation: Utilizes centrifugal force to separate impurities in oil, saving long‑term costs associated with filter element replacement.
Dehydration and Degassing
Completed in a vacuum degassing tank to remove moisture and gas from the insulating oil.
Prevention of Transformer Oil Deterioration
Research has shown that 80% of equipment failures and shutdowns related to oil are caused by oil contamination. Therefore, preventive oil maintenance is crucial for ensuring equipment reliability.
By using reliable transformer oil filtration equipment, insulation oil purification treatment can be effectively completed, thereby extending the service life of transformers and improving operational reliability.
Choosing the Appropriate Transformer Oil Filtration Equipment
Transformer oil filtration is highly beneficial to various enterprises. Therefore, it is essential to select high‑quality insulation oil purification equipment. It is recommended to choose a manufacturer that can provide high‑quality equipment and ensure a high return on investment (ROI).