Cables subterráneos de alta tensión: del diseño a la puesta en servicio
Acompañamos su proyecto de cables subterráneos de alta y extra alta tensión en cada etapa: ingeniería, tendido, montaje de terminales y empalmes con técnicos certificados, y pruebas.
Engineering
As cable system specialists, we specify and develop competitive solutions for each project, backed by the R&D teams of our partner manufacturers.
- Cable system and accessory specification
- Installation engineering
- Detailed engineering review and optimisation
Cable laying
We plan, design and carry out HV and EHV cable laying, and support the project through to commissioning.
Cable laying equipment- TEMA 45 kN and Thaler 80 kN controlled-tension pullers
- Shaft and rail drum stands with 40 t hydraulic unit
- U4 support winches and 1 t electric winches
- Wire ropes, rollers, scaffolding and special bends
Terminations and joints
We have a team of installers certified by the parent factory to carry out special high-voltage connections, with specialised tools for each type of accessory. Our experience working with the leading power transmission and distribution companies backs us as specialists in insulated connections.
- Self-supporting, flexible and porcelain outdoor terminations
- One- and three-piece premoulded joints, submarine joints and fibreglass-reinforced joints
- Terminales GIS con tecnología plug-in e instalación de hembras GIS
- CONNEX MV separable connectors and surge arresters, sizes 1 to 3
- Earthing with link boxes
- Repair of faulty cables and accessories View cases →
Testing and commissioning
We test high-voltage underground and submarine lines to IEC and IEEE standards, ensuring system integrity and proper commissioning.
Cable integrity
- Visual inspection
- Phase sequence and continuity check
- Phase conductor electrical resistance
- Metallic screen electrical resistance
- Outer sheath test (IEC 60229)
Diagnostics
- Tan delta at very low frequency (VLF)
- VLF withstand test up to 90 kV peak (IEEE 400.2)
- Partial discharge measurement per phase
- Earthing system and screen measurements
- Differential conductor reflectometry
Commissioning
- Protocols to IEC 60840 and IEC 62067
- 24-hour supervised no-load energization
- Partial discharge mapping at transitions
- Installation records and test results
Do you have a medium or high-voltage project?
Tell us what you need and we will prepare a technical proposal.