Ageing of Technical Air and Technical Air with 7.5% C5-Fluoroketone by Free-Burning Arcs

Authors

  • A. Subhana Department of Electric Energy, Norwegian University of Science and Technology, Trondheim, 7491, Norway
  • N. S. Støa-Aanensen SINTEF Energy Research, Trondheim, 7491, Norway
  • M. Gammelsæter SINTEF Energy Research, Trondheim, 7491, Norway
  • E. J. Seither SINTEF Energy Research, Trondheim, 7491, Norway
  • F. Mauseth Department of Electric Energy, Norwegian University of Science and Technology, Trondheim, 7491, Norway

DOI:

https://doi.org/10.14311/ppt.2023.2.89

Keywords:

free-burning arc, environmentally friendly insulation gas, ageing, arc contact erosion

Abstract

This paper reports on the effect of ageing by free-burning arcs in 7.5% C5-fluoroketone (C5-FK) with 92.5% technical air in comparison to that in technical air (80% N2, 20% O2) at 1.3bar absolute pressure. The gases are aged by applying a series of arcs dissipating an accumulated energy of around 315kJ. It is found that the arc voltages in technical air and technical air with C5-FK are in the same range and do not vary significantly as a function of ageing or current amplitude (∼40-900 A). Contact erosion in both mediums is found to be similar if the discharge procedure is same. However, erosion increases significantly if ageing is performed in a short contact gap that needs more arcing operations to achieve similar level of arcing energy accumulation. Furthermore, gas decomposition by-products are analysed using gas chromatography coupled with mass-spectrometry.

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Published

2023-08-31

Issue

Vol. 10 No. 2 (2023)

Section

Articles

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Copyright (c) 2023 A. Subhana, N. S. Støa-Aanensen, M. Gammelsæter, E. J. Seither, F. Mauseth

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