5. Quality Inspection and Acceptance Requirements
After selecting the type of insulating oil, strict quality inspection and acceptance must be carried out before filling. The inspection items include dielectric strength, dielectric loss, acid value, moisture content, viscosity, pour point, flash point and oxidation stability, all of which must meet the standards and the transformer's design requirements. Samples shall be taken for third-party testing, and the oil can be filled into the transformer only after passing the inspection. During storage and transportation, the oil shall be protected from moisture, contamination and sunlight exposure to maintain its original performance.
6. Conclusion
The selection of high-voltage transformer insulating oil is a systematic work that comprehensively considers voltage level, operating environment, material compatibility, safety, environmental protection and economy. The core is to select insulating oil with excellent electrical performance, oxidation stability, heat dissipation and environmental adaptability according to the actual working conditions of the transformer. Strict compliance with selection criteria and performance requirements can effectively improve the operational reliability of high-voltage transformers, reduce failure risks, and provide a solid guarantee for the safe and stable operation of the power grid.
With the development of UHV power transmission technology and the improvement of environmental protection requirements, environment-friendly, high-performance and long-life synthetic insulating oil will be more widely used. Continuous optimization of selection standards and performance control will further promote the upgrading of high-voltage transformer technology and the sustainable development of the power industry.
