Insulation ring main unit XGN-40.5

groundingmedium-voltageSF6 gas-insulated

Overview
The XGN-40.5 is an intelligent SF6 gas-insulated metal-enclosed ring main unit switchgear engineered for medium-voltage distribution networks requiring compact, reliable switching and protection in harsh environments. The design integrates gas-insulated switching components within a stainless steel enclosure for enhanced sealing and operational longevity.

Key features

• 2mm stainless steel enclosure: Precision laser-cut stainless steel plates with robotic welding deliver consistent sealing and structural integrity.
• Fully sealed SF6 gas chambers: Load switch, earthing (grounding) switch, insulation cylinders and busbars are hermetically enclosed in stainless steel chambers rated IP67 and validated by vacuum leak testing.
• Integrated pressure relief device: Explosion-proof diaphragm directs pressure discharge safely in case of internal anomalies to protect personnel, cables and adjacent equipment.

Design and reliability details

• Hermetically sealed gas compartments housing critical switching components to minimize environmental impact on insulation and switching performance.
• IP67-rated stainless steel chambers prevent ingress of dust and water, maintaining long-term insulation integrity.
• Vacuum leak testing applied to each gas chamber to verify long-term hermeticity.
• Enclosure fabrication using laser precision cutting and robotic automated welding for repeatable quality and sealing performance.
• Pressure relief system with explosion-proof diaphragm to ensure controlled directional venting during internal faults.

Applications
Designed for medium-voltage distribution where a compact SF6 gas-insulated, metal-enclosed ring main unit is required for reliable switching, protection and distribution under harsh environmental or industrial conditions.

Technical specifications

• Model: XGN-40.5
• Type: Intelligent SF6 gas-insulated metal-enclosed ring main unit switchgear
• Enclosure material: 2mm stainless steel plates
• Manufacturing: Laser precision cutting; robotic automated welding
• Sealing: Hermetically sealed SF6 chambers
• Ingress protection (chambers): IP67
• Validation: Vacuum leak testing of gas chambers
• Protected components in gas chamber: Load switches, earthing (grounding) switches, insulation cylinders, busbars
• Safety feature: Integrated pressure relief device with explosion-proof diaphragm for directional pressure release