C₅F₁₀O is one of the promising SF₆ replacements in power switchgears due to its low global warm potential and high dielectric strength. As Cu metal evaporated by discharges and overheat faults in power switchgears will change the decomposition mechanism and products of C₅F₁₀O, the interaction between C₅F₁₀O and Cu vapor is important to evaluate the arc-quenching behavior but seldom reported yet. Therefore, this paper is focused on the impacts of Cu vapor, mainly released from the contacts in circuit breakers, on the decomposition mechanism and products of C₅F₁₀O. The molecular geometries, harmonic vibrational frequencies, and energetic information of products, reactants, and transition states in C₅F₁₀O + Cu decomposition pathways including 19 reactions were calculated by density functional theory. The main decomposition reactions and products were selected based on the analysis of rate constants. This work is hopeful to evaluate the arc-quenching behavior of C₅F₁₀O-insulated power equipment considering the evaporation from Cu contacts.

中文翻译：

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Cu蒸气存在下C5F10O分解机理的理论研究

C ₅ F ₁₀ O由于其低的整体温势和高的介电强度而成为电力开关设备中有希望的SF ₆替代品之一。由于放电开关中的铜金属蒸发和电力开关设备的过热故障会改变C ₅ F ₁₀ O的分解机理和产物，因此C ₅ F ₁₀ O与Cu蒸气之间的相互作用对于评估灭弧性能很重要，但鲜有报道。 。因此，本文重点研究主要从断路器触点释放的铜蒸气对C ₅ F ₁₀分解机理和产物的影响。O.通过密度泛函理论计算了包括19个反应在内的C ₅ F ₁₀ O + Cu分解途径中的分子几何结构，谐波振动频率以及产物，反应物和过渡态的能级信息。根据速率常数的分析选择主要的分解反应和产物。这项工作对评估考虑到Cu触点蒸发的C ₅ F ₁₀ O绝缘电力设备的灭弧行为很有希望。