Over Thermal Decomposition Characteristics of C₅F₁₀O: An Environmental Friendly Insulation Medium

C₅F₁₀O gas insulating medium has attracted wide attention in the power industry for its excellent environmental potential and insulation performance. When C₅F₁₀O gas is applied in power industry engineering, it will inevitably face the over thermal fault which often occurs inside the equipment. Under the long-term effect of the local over thermal fault, whether C₅F₁₀O itself can maintain stability is an important factor to determine its engineering application. However, the thermal stability characteristics of C₅F₁₀O and its mixture are still unknown. Therefore, through systematic experimental research on the existing experimental platform of partial over thermal of the gas insulating medium, this paper explores the initial decomposition temperature of 5% C₅F₁₀O and 95% CO₂ mixture, the formation conditions of decomposition components, the relationship between the generation characteristics of decomposition components and fault temperature, and so on. The results show that when the pressure of 5% C₅F₁₀O and 95% CO₂ is 0.2MPa, the mixture begins to decompose at about 400° to form C₃F₈ and C₃F₆. C₂F₆ and CF₄ will be produced at above 500°. The process of C₃F₆ formation is the endothermic reaction, while the process of C₃F₈, C₂F₆ and CF₄ formation is an exothermic reaction, which is very beneficial to the formation of C3F6 un-der superheated conditions. As a result, the product concentration shows as C₃F₆ > C₃F₈ > C₂F₆ > CF₄, and the rate of product formation is positively correlated with the over thermal fault temperature. The results of this study lay a foundation for the application of C₅F₁₀O gas in the electric industry.