enEnglisch
GIL – Gas-Insulated Lines with pressurized air
GIL technology has been further developed to use pressurized air instead of SF6, with improved functionality
The next generation of GIL technology: Hivoduct pressurized-air cables enable high-voltage connections of up to 420 kV and 5,000 A – using pressurized air instead of SF₆, with detachable, boltless flanges, a roller system and integrated monitoring.
Benefits for GIL applications
SF₆- and PFAS-free
Pressurized air insulation. The only gas option for large-scale installations.
1-phase oder 3-phase
Versatile for any application.
Rigid aluminium enclosure
Pressure vessel, grounded, EM shielding, fire protection, protection against vandalism, protection against internal arcing.
Up to 420 kV und 5,000 A
For maximum transmission performance.
Flexible cable routing
In micro-tunnels, walkable tunnels, protective pipes and on substations.
Integrated Monitoring
Pressure, temperature, and humidity are continuously monitored.
You can find details of the technical specifications here.
The GIL principle further developed using pressurized air
Single-phase or three-phase encapsulated
Hivoduct pressurized air cables are available in single-phase or three-phase encapsulated versions. Pressurized air insulates the conductors within the aluminium housing.
The right design for every project
Single-phase systems offer a high degree of flexibility in cable routing. Three-phase systems require less installation space and are particularly suitable for long, predominantly straight runs.
Flexible installation options
Walk-through tunnels
For long-distance, high-performance connections with high data transfer rates
Technical specifications
Hivoduct pressurized air cables are suitable for GIL applications up to 420 kV and 5,000 A. The system is designed on a project-by-project basis, taking into account voltage, current, cable routing and space constraints.
Voltage & transmission capacity
Insulation & pressure system
Safety & enclosure
Standards & system design
Tried and tested
Hivoduct pressurized air cables have been successfully used in pilot plants, type tests, qualification projects and commercial high-voltage applications.
145 kV · 2,000 A
Commercial application · Switzerland
GIS transformer connection in an existing switchgear installation.
245 kV · 4,000 A
Tunnel installation · Switzerland
Test installation in existing tunnel infrastructure.
Technical documents
Factsheets und Hintergrundinformationen zum Download
Vergleiche
📄 PAC vs. VPE-Cables
📄 PAC vs. Overhead lines
Technische Grundlagen
📄 Single-phase and three-phase systems
📄 Magnetic fields
📄 Leakage and Pressure Management
📄 Life Cycle Analysis (LCA)
📄 Internal Arc Faults
Are you planning a GIL application?
We will assess how your requirements can be met using Hivoduct pressurized air cables – SF₆-free and tailored to your specific project