Characteristics of PTFE ablation due to SF₆ arc exposure were studied to predict the ablated mass of PTFE nozzle in high‐voltage circuit breaker. From the measurement of the ablated mass, the predominant factor of the PTFE ablation was revealed as a radiation power of SF₆ arc. Subsequently, the radiation power absorbed in PTFE was formulated on the basis of the radiation transfer property and the arc physics. The formulation for the prediction of the PTFE ablated mass was established with the formulated radiation power and the measured masses. Finally, the validity of the PTFE ablated mass prediction was shown from the results of the error verification with the measured masses.

中文翻译：

---

大电流SF6电弧暴露导致的PTFE喷嘴烧蚀质量：烧蚀质量的制定

研究了SF ₆电弧暴露导致的PTFE烧蚀特性，以预测高压断路器中PTFE喷嘴的烧蚀质量。从烧蚀质量的测量中，PTFE烧蚀的主要因素显示为SF ₆电弧的辐射功率。随后，基于辐射传输特性和电弧物理特性，确定了在PTFE中吸收的辐射功率。通过公式化的辐射功率和测得的质量，建立了预测PTFE烧蚀质量的公式。最后，根据对所测质量的误差验证结果，证明了PTFE烧蚀质量预测的有效性。