Introduction
Transformer oil is one of the most important components inside an oil-filled transformer. It provides electrical insulation between energized components and helps transfer heat away from transformer windings and cores.
However, during long-term operation, transformer oil gradually deteriorates due to moisture contamination, oxidation, dissolved gases, and solid particles. These contaminants reduce dielectric strength, accelerate insulation aging, and increase the risk of transformer failure.
Therefore, regular transformer oil purification is essential to maintain reliable transformer operation, extend service life, and reduce unexpected maintenance costs.
What Is Transformer Oil Purification?
Transformer oil purification is a maintenance process used to remove harmful contaminants from insulating oil and restore its electrical and chemical performance.
A professional transformer oil purifier normally removes:
- Moisture
- Dissolved gases
- Dust and particles
- Carbon deposits
- Sludge
- Oxidation products
The main purification technologies include:
- Vacuum dehydration
- Vacuum degassing
- Fine filtration
- Oil regeneration