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

C
₅
F
₁₀
O gas insulating medium has attracted wide attention in the power industry for its excellent environmental potential and insulation performance. When C
₅
F
₁₀
O 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 C
₅
F
₁₀
O itself can maintain stability is an important factor to determine its engineering application. However, the thermal stability characteristics of C
₅
F
₁₀
O 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% C
₅
F
₁₀
O and 95% CO
₂
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% C
₅
F
₁₀
O and 95% CO
₂
is 0.2MPa, the mixture begins to decompose at about 400° to form C
₃
F
₈
and C
₃
F
₆
. C
₂
F
₆
and CF
₄
will be produced at above 500°. The process of C
₃
F
₆
formation is the endothermic reaction, while the process of C
₃
F
₈
, C
₂
F
₆
and CF
₄
formation is an exothermic reaction, which is very beneficial to the formation of C
₃
F
₆
un-der superheated conditions. As a result, the product concentration shows as C
₃
F
₆
> C
₃
F
₈
> C
₂
F
₆
> CF
₄
, 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 C
₅
F
₁₀
O gas in the electric industry.