The test result analysis for SFRA test can detect transformer windings for mechanical deformation or displacement effectively.
Data comparison
Compare test results with factory data or historical data to analyze differences.
Focus on the peak value, valley value, and overall shape change of the frequency response curve.
Judging standard
If the frequency response curve has a significant shift or peak change, it may indicate that the winding is deformed.
If the short-circuit impedance changes beyond the allowable range (usually ±3%), further inspection is required.
If the test results are abnormal, further examination, such as a core test or partial discharge test, is recommended.
According to the inspection results, make maintenance or replacement plans to ensure the safe operation of the transformer.
It can effectively detect whether there is deformation in the transformer winding and provide a reliable basis for equipment maintenance though analysis the test result of SFRA test.