Sweden - Lund
Skanska Sverige AB
04‑2020 - 12‑2020
Steconfer has carried out the complete overhead line installation of the Spårvägen Lund project, including earthing & bonding and the return current management.
This project was very exciting mostly due to some particular and complex aspects. Effectively, along a considerable amount of the route, there is sensitive research equipment that, together with the university hospital's X-ray departments, forced the construction of the overhead contact line to take special regards to EMF (Electric and Magnetic Fields) to minimize the risk of affecting those facilities. This system, second in the world, consisted of the assembly of section insulators on every console in order to interrupt the electrical continuity of the contact wire in between consecutive cantilevers. This also originated the need of having to inject current on one side of all those insulators, section by section, to keep the system energized,
The installed system is a “trolley” type catenary with mechanical compensation, composed of a hard-drawn electrolytic copper contact wire, supported on cantilevers or cross-spans, including under bridges or viaducts installation.