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We investigated the fundamental characteristic of CF3I as a substitute gas for SF6. CF3I has lower global warming potential. The use of pure CF3I in gas-insulated switchgear and gas circuit breakers is difficult because liquid CF3I has a high boiling point. We therefore mixed CF3I with CO2 or N2. In short line fault (SLF, 1 kApeak) and breaker terminal fault (BTF, 3 kApeak) interruption, the performance...
In our research, CF3I which has a low environmental impact was investigated as a substitute gas for SF6. Global warming potential of CF3I is less than 5 and the ozone depleting potential is near to zero. Additionally, CF3I has a dielectric strength that is higher than SF6. But, pure CF3I application to gas insulated switchgear (GIS) or gas circuit breakers (GCB) is difficult because the liquefying...
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