ZXXGN-12 series fully insulated and fully sealed gas-insulated ring main switchgear is applicable to 12kV three-phase AC 50Hz power distribution systems. It adopts an overall hermetic gas-filled structure, uses eco-friendly insulating gas as insulation and arc-extinguishing medium, and achieves full cabinet sealing and full component insulation. Compact in size and reasonable in layout, it is unaffected by external humidity, dust, condensation and pollution with excellent weather resistance.