Abstract
From an environmental perspective, when performing internal arc tests on SF 6 -insulated power equipment, SF 6 may be replaced with air in accordance with the International Electrotechnical Commission standard. To develop an alternative method for internal arc testing in SF6-insulated power equipment, a specific procedure must be proposed to replace SF 6 with air and select appropriate test parameters. Therefore, we have systematically obtained the experimental and analytical data of air and SF 6 arcs to calculate the pressure rise in electric power equipment and the thermal effect of hot gas on the surroundings. The modeling of SF 6 -air and air-air flows is implemented using computational fluid dynamics to analyze the characteristics of pressure rise and exhausted hot gas due to internal arc faults in SF 6 -insulated power equipment.
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