Importance of Temperature Rise Test in Power Transformers
The stabilization period of the temperature rise test in power transformers is essential for assessing their thermal behavior. Continuous efforts are underway to reduce this period while ensuring that the results remain stable and dependable.
Methodology for Thermal Stabilization
Thermal stabilization during the temperature rise test in power transformers immersed in mineral oil is achieved by charging them to a constant capacity at their design cooling. Monitoring occurs through sensors or thermometers, recording temperatures at various locations according to national and international regulations, such as ANCE / NMX, IEEE / ANSI, IEC, among others. Absolute temperature readings are taken hourly from startup, along with oil samples collected before and after the test for dissolved gas analysis.
This study encompasses several cases involving different types of transformers to observe behaviors and outcomes that validate the ability to expedite stabilization without compromising the integrity of the test results.
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Based on the Energy Management website.