Mechanisms Responsible for Arc Cooling in Different Gases in Turbulent Nozzle Flow

Authors

  • Y. Guo Pinggao Group Co. Ltd., Pingdingshan City, Henan, 467001
  • H. Zhang Pinggao Group Co. Ltd., Pingdingshan City, Henan, 467001
  • Y. Yao Pinggao Group Co. Ltd., Pingdingshan City, Henan, 467001
  • Q. Zhang Department of Electrical Engineering and Electronics, the University of Liverpool, Liverpool L69 3GJ
  • J. D. Yan Department of Electrical Engineering and Electronics, the University of Liverpool, Liverpool L69 3GJ

DOI:

https://doi.org/10.14311/ppt.2017.3.234

Keywords:

SF6 replacement, SF6 alternative gases, switching arc

Abstract

A high voltage gas blast circuit breaker relies on the high speed gas flow in a nozzle to remove the energy due to Ohmic heating at high current and to provide strong arc cooling during the current zero period to interrupt a fault current. The physical mechanisms that are responsible for the hugely different arc cooling capabilities of two gases (SF6 and air) are studied in the present work and important gas material properties controlling the cooling strength identified.

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Published

2017-02-12

Issue

Vol. 4 No. 3 (2017)

Section

Review Papers

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