Ablated mass of PTFE nozzle due to high‐current SF6 arc exposure: Formulation of ablated mass. Issue 3 (6th August 2019)

• Record Type: Journal Article
• Authors: Sato, Motohiro; Horinouchi, Katsuhiko; Hiza, Shuichi; Nakamura, Yasunori; Shimizu, Yoshinori; Yokomizu, Yasunobu
• Is Part Of: Electrical engineering in Japan. Volume 208:Issue 3/4(2019)
• Page Start: 29
• Page End: 38
• Publication Date: 2019-08-06
• Subjects: ablation -- GCB -- nozzle -- PTFE -- radiation power -- SF6 arc; Electrical engineering -- Periodicals; 621.30952
• DOI: 10.1002/eej.23239
• Languages: English
• ISSNs: 0424-7760

Abstract

Abstract: 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.