Compatibility between C 6 F 12 O–N 2 Gas Mixture and Metal Used in Medium-Voltage Switchgears

Ran Zhuo, Qi Chen, Dibo Wang, Mingli Fu, Ju Tang, Juntai Hu and Yanlei Jiang
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Ran Zhuo: Electric Power Research Institute, China Southern Power Grid, Guangzhou 510623, China
Qi Chen: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Dibo Wang: Electric Power Research Institute, China Southern Power Grid, Guangzhou 510623, China
Mingli Fu: Electric Power Research Institute, China Southern Power Grid, Guangzhou 510623, China
Ju Tang: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Juntai Hu: Pingdingshan Power Supply Company, State Grid Corporation of China, Pingdingshan 467001, China
Yanlei Jiang: Pingdingshan Power Supply Company, State Grid Corporation of China, Pingdingshan 467001, China

Energies, 2019, vol. 12, issue 24, 1-11

Abstract: C 6 F 12 O has been introduced as the potential alternative gas to SF 6 because of its excellent insulation properties and great eco-friendly performance. Considering that C 6 F 12 O may react with the internal materials of switchgears in practical applications, its compatibility with metal materials must be tested to evaluate its long-term application possibilities. In this work, the compatibility of C 6 F 12 O–N 2 gas mixtures with aluminum and copper was tested at different temperatures by setting up a heat-aging reaction platform between the gas and each metal. The metal surface morphology and gas composition before and after the reaction were compared and analyzed. The results show that the surface color of the copper sheet changed considerably, and the corrosion degree of the surface deepened with the increase of temperature. The decomposition of C 6 F 12 O was also promoted. In contrast, aluminum did not react severely with the gas mixture. The compatibility of the gas mixture with aluminum was generally better than that of copper.

Keywords: SF 6 alterative gas; C 6 F 12 O–N 2 gas mixture; material compatibility; copper; aluminum (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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