Experimental research on insulation properties of C
 6
 F
 12
 O/N
 2
 and C
 6
 F
 12
 O/CO
 2
 gas mixtures

Zhang, Xiaoxing; Xiao, Song; Deng, Zaitao; Li, Yang; Tang, Ju

doi:10.1049/iet-gtd.2018.5474

Cited by 23 publications

(7 citation statements)

References 29 publications

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“…However, high GWP of SF 6 limited its use in the electrical system. In addition, decomposition products of SF 6 were mainly highly toxic by-products, such as SO 2 F 2 , SOF 2 , SOF 4 , HF and S 2 F 10 [33], [34]. According to the Table 3, GWP of c-C 4 F 8 O was 8700, about one-third that of SF 6 with lower impact on the environment.…”

Section: H Decomposition Mechanism Of C-c 4 F 8 Omentioning

confidence: 99%

Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications

Gao

Wang

et al. 2020

IEEE Access

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The usage and emission of SF 6 has been regulated because of high Global Warming Potential (GWP) and long atmospheric lifetime as an insulator in high voltage power transmission equipment. This paper proposes cC 4 F 8 O and its mixtures as a substitute for SF 6 with low GWP and superior insulation performance. cC 4 F 8 O is synthesized by 1,4-diiodoperfluorobutane and fuming sulfuric acid with the yield of 55.7% under optimal conditions. The GWP of cC 4 F 8 O is about one-third that of SF 6 and its dielectric strength is about 1.2-1.4 times that of SF 6. CO 2 and N 2 are mixed with cC 4 F 8 O to lower liquefaction temperature and GWP. The investigation of breakdown voltage and self-recoverability of gas mixtures has shown that the insulation performance and stability of cC 4 F 8 ON 2 is better than cC 4 F 8 O-CO 2 mixtures. The decomposition process of cC 4 F 8 O might produce some nonflammable or inexplosive by-products, such as C 2 F 4 , cC 2 F 4 O, cC 3 F 6 and CF 2 O simulated by Gaussian 09. The results indicate that cC 4 F 8 O and N 2 mixtures have potential to replace SF 6 in electrical equipment. INDEX TERMS Synthesis, perfluorotetrahydrofuran, insulation performance, sulfur hexafluoride substitutes.

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Section: H Decomposition Mechanism Of C-c 4 F 8 Omentioning

confidence: 99%

Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications

Gao

Wang

et al. 2020

IEEE Access

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“…Given the working pressure and liquefaction temperature requirements (−5 °C) of MV switchgears [32], the total gas pressure and content of C6F12O in the experiment were fixed to 0.2 MPa and 5%, respectively. The breakdown voltage of 5% C6F12O-95% N2 gas mixture at 0.2 MPa is about 1.05 times that of 10% SF6-90% N2 [29]. Considering the temperature rise effect of the current-carrying metal inside the equipment under the rated working condition and the local overheating faults caused by the poor contact of the contacts, the experimental temperature was set to 150 °C, 200 °C, and 250 °C.…”

Section: Experimental and Analytical Methodsmentioning

confidence: 99%

“…Chemical formula C Currently, C 6 F 12 O is only used as a fire-extinguishing agent and covering gas for magnesium treatment as well as two-phase immersion cooling systems, which is safe to use and relatively low in cost [26]. Furthermore, research on C 6 F 12 O as a gas-insulating medium has just started [27][28][29][30]. However, due to its high boiling point, C 6 F 12 O cannot be used as an insulating medium alone; that is, it must be mixed with a buffer gas, such as N 2 or CO 2 .…”

Section: C5-pfk C6-pfk Sfmentioning

confidence: 99%

Compatibility between C6F12O–N2 Gas Mixture and Metal Used in Medium-Voltage Switchgears

et al. 2019

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C6F12O has been introduced as the potential alternative gas to SF6 because of its excellent insulation properties and great eco-friendly performance. Considering that C6F12O 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 C6F12O–N2 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 C6F12O 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.

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“…According to the article published by Tian Shuangshuang et al from 2018 to 2022, C 6 F 12 O gas mixture is used as the insulating medium for the switch of low-voltage electrical equipment. C 6 F 12 O is bonded with ethylene propylene diene monomer (EPDM), nitrile butadiene rubber (NBR), fluororubber(FKM) reacts and forms C 3 F 6 ,C 3 F 7 H and other substances at higher temperatures [2][3][4][5]. FC-72 and common rubber may also produce the above reaction, which indicates that the compatibility problem may have a certain uncertainty.…”

Section: Introductionmentioning

confidence: 99%

Study of compatibility of FC-72 with several common packing and sealing materials

xu,

LUO,

TANG

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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There are some uncertainties about the compatibility of FC-72 with PI and PEEK as well as nitrile butadiene rubber(NBR), fluororubber(FKM) and silicone sealing materials. This paper provides a test platform for liquid FC-72 to carry out compatibility test with test materials. By carrying out compatibility reaction between materials and periodically recording the quality change of test materials, the compatibility between different materials and FC-72 can be determined.

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Experimental research on insulation properties of C ₆ F ₁₂ O/N ₂ and C ₆ F ₁₂ O/CO ₂ gas mixtures

Cited by 23 publications

References 29 publications

Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications

Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications

Compatibility between C6F12O–N2 Gas Mixture and Metal Used in Medium-Voltage Switchgears

Study of compatibility of FC-72 with several common packing and sealing materials

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Experimental research on insulation properties of C 6 F 12 O/N 2 and C 6 F 12 O/CO 2 gas mixtures

Cited by 23 publications

References 29 publications

Investigation of Synthesis and Dielectric Properties of c-C4F8O With Its CO2/N2 Mixtures as SF6 Alternatives in Gas-Insulated Applications

Investigation of Synthesis and Dielectric Properties of c-C4F8O With Its CO2/N2 Mixtures as SF6 Alternatives in Gas-Insulated Applications

Compatibility between C6F12O–N2 Gas Mixture and Metal Used in Medium-Voltage Switchgears

Study of compatibility of FC-72 with several common packing and sealing materials

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Experimental research on insulation properties of C ₆ F ₁₂ O/N ₂ and C ₆ F ₁₂ O/CO ₂ gas mixtures

Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications

Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications