Abstract
Recently, SF6 has been identified as a greenhouse gas with a long atmospheric lifetime1. Therefore, recycling guidelines for SF6 in electrical power equipment have been discussed, and the reduction of the release of SF6 to the atmosphere has progressed2. In addition, many researchers have investigated alternative insulation gases to SF6 3-5. High-pressure N2 gas is one of the proposed alternative gases that have no need of SF6. Pure N2 has a lower withstand voltage level than SF6, but has the advantage of being not only environmentally friendly, but also low in cost and safe. The breakdown characteristics of compressed N2 have already been discussed as part of the basic study on gas discharge in the 1930s6. However, most data on the electrical breakdown of compressed N2 were obtained under limited experimental conditions (small electrode scale or kinds of applied voltage waveform), and are not sufficient to estimate the insulation performance.
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Goshima, H., Shinkai, H., Yashima, M. (2001). Lightning Impulse Breakdown Characteristics of High-Pressure N2 as an Alternative Insulation Gas to SF6 . In: Christophorou, L.G., Olthoff, J.K. (eds) Gaseous Dielectrics IX. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-0583-9_50
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DOI: https://doi.org/10.1007/978-1-4615-0583-9_50
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