Gas-insulated substation GXL5

power distributionmodular

Overview
GXL5 series 40.5–1100 kV AC GIL (gas-insulated metal-enclosed transmission line) encloses all conductive and insulating components within earthed metal housings filled with SF6 gas. Developed as a standardized GIL solution with full domestic IP, the GXL5 is optimized for high-capacity, low-loss, low-maintenance transmission in challenging environments and large power-export scenarios.

Core components

• Straight units
• Angle units
• Compensation units
• Support and fastening systems

Main technical features and structural innovations

• SF6 gas as the insulation medium; all components sealed in grounded housings
• Innovative dumbbell-shaped three-column insulator reducing tangential field at gas–solid interfaces and surface field on metal inserts
• Combined high/low-potential particle-suppression structure for effective particulate control
• Plug-in electrical connections with external shielding cover to collect metal debris from contact friction
• Standardized GIL production and modular assembly for streamlined manufacturing, transport and installation

Performance and advantages

• High-capacity transmission with low losses and minimal maintenance
• Rated current up to 8000 A
• High insulation level and long-term stable operation
• Suitable for complex environments: high altitude, large elevation differences, high seismic intensity, uninhabited areas and protected zones

Typical applications

• Ultra-high voltage and extra-high voltage transmission projects
• Large-capacity power export from nuclear, thermal and pumped-storage plants
• Urban renewal, integrated utility corridors and transmission across difficult terrain or protected areas

Technical characteristics / specifications

• Series: GXL5
• Voltage range: 40.5–1100 kV
• Product type: AC GIL (gas-insulated metal-enclosed transmission line)
• Insulation medium: SF6 gas
• Design: Components enclosed in grounded housings; modular assembly
• Core components: Straight units, angle units, compensation units, support system
• Rated current: up to 8000 A
• Insulation innovations: Dumbbell-shaped three-column insulator; combined high/low-potential particle suppression
• Electrical connection: Plug-in structure with external shielding cover
• Manufacturing: Standardized production and modular assembly for transport and installation
• Quality targets: Zero discharge, zero leakage, first-time commissioning success, long-term stable operation
• Suitable environments: High altitude, large elevation difference, high seismic intensity, uninhabited and protected areas