NKT has successfully deployed a world-first 400 kV HVAC temporary cable solution for German transmission system operator Amprion as part of ongoing grid upgrade works. The project marks the first time that an extra-high-voltage temporary cable is applied in a reusable configuration in transmission grid operations, combining uninterrupted power flows during construction phases with reduced material waste through reuse.
First-ever reusable 400 kV temporary cable solution
The modular, pluggable temporary cable system is designed to operate for shorter timeframes. When decommissioning or reconfiguring existing high-voltage substations, the temporary cable serves as an intermediate solution until the new system is operational. Unlike conventional temporary solutions, which are typically dismantled and disposed of after use, NKT’s temporary cable system can be disconnected, stored, and redeployed in future projects. This approach significantly reduces material waste, conserves resources and lowers overall project costs.
Developed in close collaboration with leading TSOs
The cable solution is based on a specification jointly established by a group of German TSOs. NKT collaborated closely with Amprion to translate these requirements into a fully qualified cable system and to implement the pilot project, establishing a scalable framework for future applications.
Enabling scalable and standardised solutions
Introducing a uniform specification for reusable temporary cables enables scalability, interoperability, and improved efficiency across projects and operators. The successful implementation in Amprion’s project paves the way for wider adoption of reusable extra-high-voltage temporary cable systems, supporting the accelerated expansion and modernisation of power grids needed to integrate renewable energy sources across Europe.
Original announcement: NKT
Image: Courtesy of NKT
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