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HVDC technology is increasingly adopted for long distance transmission of bulk power at reduced cost in comparison with HVAC systems. Epoxy is a popular material for insulators/spacers used in sealed space such as in GIS or wall bushings with selected fillers, providing excellent electrical insulation and mechanical support. Practical operation and previous research [1-5] has however suggested that...
Perfluorocyclobutance (c-C4F8) is a potential alternative insulating gas to SF6. It is nontoxic and has lower global warming potential (GWP) compared with SF6. Because of the high boiling point, the c-C4F8 and N2 mixture gas has been suggested as a replacement to SF6 in gas insulated switchgear (GIS). However, the synergistic effect of c-C4F8/N2 under lightning impulse is seldom researched. This paper...
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