Insulation spacer and SF_6 gas insulated switchgear using it

摘要

At least a surface layer of an insulating spacer (1) for insulating and supporting an electric conductor (2) disposed in a container (3) filled with SF ₆ gas is made of SiO ₂ whose main component is SiO ₂ coated with an inorganic substance having internal SF ₆ decomposition gas Wherein the insulating spacer is formed of a cured product of a resin composition containing a filler.;It is possible to provide an insulating spacer which is stable to decomposition products of SF ₆ gas and has a low dielectric constant. In addition, the by using the insulating spacers excellent in insulation reliability and insulation design induction is possible to provide for a SF ₆ gas insulated switchgear.