Arc temperature profile measurement and characteristic analysis on an SF6 high‐voltage CB. Issue 12 (19th March 2018)

• Record Type: Journal Article
• Authors: Bai, Su; Guan, Yonggang; Luo, Haiyun; Liu, Weidong
• Is Part Of: IET generation, transmission & distribution. Volume 12:Issue 12(2018)
• Page Start: 3046
• Page End: 3051
• Publication Date: 2018-03-19
• Subjects: temperature measurement -- circuit breakers -- SF6 insulation -- interrupters -- nozzles; arc temperature profile measurement -- characteristic analysis -- SF6 high‐voltage CB -- circuit breaker -- optical fibres -- spectrograph -- short current interruption -- nozzle -- arc light -- spectral line intensities -- local thermal equilibrium system -- two‐line method -- Abel inverse method -- root mean square current -- voltage 252 kV -- current 15 kA to 50 kA -- Cu; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2017.1792
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : The arc temperature profile in an interrupter, which determines the extinguishing characteristic of an SF6 circuit breaker (CB), is of interest to designers and developers. In this investigation, optical fibres and spectrograph were employed to measure the arc temperature profiles in a 252 kV SF6 CB during short current interrupting. The temperature profiles of the upstream, throat, and downstream of the nozzle have been measured. The optical fibres can transfer the arc light from the measuring points in the nozzle to the spectrograph. Moreover, the spectral line intensities of copper (Cu) 510.5, Cu 515.3, and Cu 521.8 nm were obtained by the spectrograph. The condition in CB can be treated as a local thermal equilibrium system, and the temperature profiles can be calculated by two‐line method and Abel inverse method. The arc temperature profiles of the interrupter under 15–50 kA root mean square current have been analysed through the method established in this investigation.