KIEE - The Transactions of the Korean Institute of Electrical Engineers

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The Transactions of the Korean Institute of Electrical Engineers

The Transactions of the Korean Institute of Electrical Engineers

ISO Journal TitleTrans. Korean. Inst. Elect. Eng.

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Title	Analysis of Thermal Recovery Characteristics for Nozzle of SF6 GCB Considering Nozzle Ablation
Authors	이병윤(Lee Byeong-Yoon) ; 송기동(Song Ki-Dong) ; 정진교(Chong Jin-Kyo) ; 박경엽(Park Kyong-Yop)
Page	pp.76-82
ISSN	1975-8359
Keywords	Thermal Recovery Characteristics ; SF6 Gas Circuit Breaker ; Nozzle Ablation ; PTFE Concentration ; Post Arc Current
Abstract	In this paper, a method for analyzing the thermal recovery characteristics of the nozzle of gas circuit breaker was described. In order to obtain thermal recovery characteristics, the transient simulation of SF6 arc plasma within the nozzle was carried out. In particular, the nozzle ablation was taken into account by simultaneously solving the PTFE concentration equation with the governing equations such as continuity, momentum and energy equation. After that, post arc current calculation was performed with the rate of rise of recovery voltage changed. From the calculated post arc current, it was possible to suggest the thermal recovery characteristics of the nozzle of gas circuit breaker.

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