During the annual preventive testing of the main transformer in a 330kV substation, the dielectric loss factor (tanδ) of the high-voltage side bushing was found to be severely exceeded, and the capacitance deviated by more than 5% from the initial value. To ensure the safety of the core equipment in the main grid, it was decided to immediately shut down the transformer for maintenance. After the maintenance, comprehensive dielectric loss and capacitance tests are required on key parts of the transformer body, high-voltage bushings, low-voltage bushings, and capacitive bushing screens to assess the insulation recovery status.
Traditional dielectric loss testing requires connecting and disconnecting different parts of the transformer (windings, bushings), with repeated climbing and long testing times, leading to high safety risks.
Data for the transformer body and each bushing must be manually recorded and compiled, making it difficult to visually compare with historical data and initial values, complicating overall condition diagnostics.
The high electric field interference in the 330kV substation makes testing more difficult.
The Intelligent Anti-interference Dielectric Loss Tester can address these challenges effectively. With strong anti-interference capabilities and multiple testing modes, it ensures accurate measurements even in high electric field environments, streamlining the testing process and improving overall efficiency.
Simplified process with fewer connections and faster test times, reducing downtime and risks.
Comprehensive, integrated testing with reduced interference, providing accurate diagnostic data.
Automated data collection and comparison, making it easier to evaluate transformer condition and plan maintenance.
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