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Pressurized Air Cable Technology
Pressurized air as a natural insulating medium for high-performance and sustainable medium- and high-voltage grids—free of SF₆ and PFAS.
Why pressurized air?
Using compressed air as its insulating medium, Hivoduct redefines power transmission. By combining high transmission capacity, compact infrastructure, and integrated condition monitoring in a single system, it delivers outstanding performance while eliminating SF₆ and PFAS. The result is a sustainable, future-ready alternative to conventional cable and gas-insulated transmission technologies.
Technology at a glance
Hivoduct combines electrical conductors, pressurized air insulation, and integrated monitoring in a modular pipe system. This creates a high-performance infrastructure for the reliable operation of medium- and high-voltage grids.
① Pressurized air as an insulating medium
High electrical strength without SF₆ or PFAS.
② Aluminium conductors
High transmission capacity with a compact design.
③ Integrated monitoring
Continuous pressure and condition monitoring.
④ Modular piping system
Flexible installation for various routes.
⑤ Scalable for medium- and high-voltage grids
For grid reinforcement and expansion.
High transmission capacity
High current-carrying capacity and low losses enable the efficient transmission of large amounts of energy, even at ultra-high voltages.
PFAS-free and SF₆-free
Pressurized air replaces PFAS- and SF₆-based insulation systems and enables a future-proof grid infrastructure.
Compact infrastructure
Its compact design allows it to be installed in protective conduits, microtunnels, and densely built-up areas.
Integrated monitoring
Pressure, temperature, and system status are continuously monitored to ensure safe grid operation.
Hivoduct by numbers
3,600 MW
max. transmission capacity
420 kV
max. voltage level
5,000 A
max. rated current
> 40 years
service life
Pressurized air cables compared to established technologies
Pressurized Air Cables vs. VPE-Cables
Comparison of transmission capacity, losses, infrastructure requirements, and operational characteristics.
Pressurized Air Cables vs. Overhead lines
Comparison of space requirements, transmission capacity, environmental impact, and network expansion.
Do you have any questions about pressurized air cabels?
First-hand technical information, fact sheets, and support for medium- and high-voltage projects.
Ready for the next generation of power grids
Hivoduct supports grid operators, infrastructure developers, and industry partners in planning high-performance medium- and high-voltage grids.