The invention relates to high-pressure large-current dry
compressed air insulated
metal closed switch equipment, solving the problems of environment
pollution and poor heat dissipation property when SF6 gas is used as an insulation medium. The switch equipment is characterized in that an upper seal plate, a left seal plate, a right seal plate and a back seal plate of a gas tank are provided with radiating fins; a three-
station switch is connected with a
solid sealed pole post through a
copper connecting piece; a
copper connecting radiating fin is installed outside the
copper connecting piece; a radiating through hole is processed on the outlet end of the moving contact of the
solid sealed pole post; the front part of the
epoxy resin insulation shell of the
solid sealed pole post is provided with a
convection notch; an anti-
cracking gap is reserved between the
epoxy resin shell and the static contact end outlet seat of the solid sealed pole post; and a U-shaped radiating
bus is mounted at the
tail end of the solid sealed pole post. The equipment disclosed by the invention has the beneficial effects of improving the distribution of electric fields while realizing
radiation, meeting the requirement of dry
compressed air insulated
metal closed equipment which takes clean and dry
compressed air as an insulation medium and has the
voltage of 40.5kV and current of more than 2000A and realizing
energy conservation and environment protection.