From regional easements to renewable-energy zones, we engineer and build the high-voltage corridors that move clean energy across Australia.
High-voltage transmission lines are how renewable energy zones reach the cities and industry that depend on them — and how networks stay reliable as the generation mix changes.
Elecnor Australia delivers overhead and underground transmission lines as a full EPC scope — from route selection and easement engineering through tower design and supply, civil foundation works, structure erection, stringing, OPGW and energisation.
Our work spans 33 kV through to 500 kV in lattice, monopole and guyed-tower configurations, including Australia's first 500 kV Danubio towers on the Dinawan-to-Wagga Wagga section of EnergyConnect. We're equally at home on long-span interconnectors, REZ enabling lines, and shorter renewable connection assets.
Backed by Elecnor Group's track record of more than 15,000 km of high-voltage transmission lines built globally, our local teams combine that engineering and supply-chain depth with regional crews, First Nations participation, and the landholder relationships every Australian corridor needs.
From new-build interconnectors to renewable connection assets and brownfield uprates — designed for the corridor and constructed to operator standards.
Multi-hundred-kilometre 330 kV and 500 kV corridors connecting states and renewable energy zones — including Australia's largest interconnector.
Connecting lines for wind, solar and battery projects to the grid — delivered alongside the connection-asset substation as a single package.
Capacity uplifts, asset-renewal projects and line refurbishments — including replacement of legacy 220 kV corridors with modern designs.
Tower selection depends on voltage, span, terrain, line angles and corridor constraints. We engineer and erect each type to operator standards.
330 / 500 kV
Traditional steel lattice towers — versatile for terrain, angles and longer spans. The workhorse of EHV networks.
500 kV
Compact V-string design with smaller footprint than traditional lattice — Australia's first 500 kV Danubio towers were erected by us between Dinawan and Wagga Wagga.
330 kV
Single tubular steel pole — used along the Buronga to Red Cliffs section, where smaller footprint and faster erection benefit the corridor.
330 kV
Central steel column held by four 35 mm guy cables — ideal for flat terrain. Up to 60 m high with a 50 × 50 m footprint.
Five phases of delivery, one accountable team — integrating route engineering, supply chain, civil works, stringing and commissioning.
Easement assessment, structure spotting, tower spotting & line-design profile, foundations & geotechnical engineering.
Tower steel, conductor, OPGW, insulators & hardware sourcing — with factory inspection & logistics planning.
Drilling, piling and pouring tower foundations — across thousands of structures, often in remote and varied terrain.
Tower assembly & erection, conductor stringing, sagging & clipping, OPGW & communications installation.
Pre-commissioning, line testing, hand-over to operator, vegetation clearance & landholder reinstatement.
As Transgrid's construction partner, we're delivering the NSW section of EnergyConnect — Australia's largest transmission project — across four new lines from the South Australian border to Wagga Wagga.
"The collaboration with our exceptional civil works and electrical contractors, as well as the construction delivery partners, has been instrumental in advancing activities within the substation and overhead transmission line disciplines." — Felipe Delgado Davara, Elecnor Australia EnergyConnect Project DirectorSee all transmission projects
EnergyConnect lines plus connection assets delivered for renewable energy projects across Australia.
High-voltage corridors run through farmland, First Nations land, regional towns and ecological habitats. We build with that in mind.
Dedicated property liaison, scheduled access, biosecurity protocols and full property reinstatement built into the program.
Direct contracts with First Nations businesses and workforce participation — visible on EnergyConnect through partners like the Garraway Group.
Regional skills initiative training new transmission line workers across NSW — building a lasting workforce, not just a project workforce.
Six purpose-built construction camps and millions invested in Riverina, Murray and Sunraysia suppliers across the eastern alignment.
What network operators and developers tell us makes the difference on transmission line projects.
Easement working, live-line proximity, weather windows — managed by a HSE system certified to ISO 45001 and embedded in every crew.
Lattice, monopole, guyed and Danubio designs — including Australia's first 500 kV Danubio towers, supplied and erected by our teams.
Integrated schedules across foundations, erection & stringing — proven across 540 km and 1,150 structures on the eastern alignment alone.
Group-level relationships with tower, conductor and hardware manufacturers — securing materials at the lead times projects need.
From early route studies and EOIs through to fully scoped EPC tenders — our delivery team can engage at any phase.
Capabilities · Transmission Lines
Project Enquiries Team
Australia & New Zealand · Sydney HQ