Tunnel multibundle cable
Environment and application
The multibundle tunnel cable is designed to be installed in a railways tunnel. However, it can beused in any environment with similar constraints, such as a road tunnel.
For more than 15 years, Nexans has been supplying major players in this area such as RATP, STIB, Thalès, Alstom, Infrabel, etc. Based on our feedbacks, we have optimised our cable to better meet the specific installation requirements of this environment.
The tunnel is an enclosed space, heavily cluttered up by already installed cables, signaling and surveillance equipment, rails, stones, and other obstacles. It is also difficult to access: geographical location, multiplicity of contributors and need to stop traffic. Given the difficulty of obtaining an intervention slot, it must be fast and effective.
The multi-bundle tunnel cable was first produced in September 2019 for the underground subway in Brussels. Fully dielectric, it contains 12 to 72 fibres in microbundles (6 units of 12 fibres maximum). The armour made up of 18 FRPs (Fiber Reinforced Plastic) is surrounded by a dual HFFR sheath, which makes the cable very resistant.
Compared to the previous generation, although more robust, the cable is smaller and lighter. The modification of the internal structure also gives it greater flexibility.
Easier to handle and more resistant, the installation of the new multi-bundle tunnel cable is so fast that it guarantees the respect of the objectives of installation distance in the reserved slot.