DuoTrack system saves time and money

Mönchengladbach, April 16, 2007 – Visitors to the Hanover Fair (April 16 to April 20) can view Nexans’ latest development in railway trunk cableling technology at stand D06 in hall 12:  the DuoTrack® system. The all-in-one system solution enables the operation of all copper and fiber-optic services required for modern economic operation of regional railways lines through a single cable. These services include communication between electronic interlocks and GSM-R deployment via fiber-optic cables, or the signalling and level crossings via copper cables and the realisation of the ETCS (European train control system).

Figure-8 design combines stability, flexibility and functionality
DuoTrack® is designed to offer the optimum combination of stability, flexibility and functionality.  It features the figure-8 cross-section that is well-established in aerial cables, with the common sheathing of copper and fiber-optic cables, which are connected to each other via a strong web, facilitating cost effective installation in a single step.  The larger lower part holds the copper cable with a variable number of copper quads, while the upper part comprises a tiny high-grade stainless steel tube with 24 single-mode fibers.  Both copper and fiber-optic cables have individual anti-rodent protection. DuoTrack® hybrid closures from Nexans allow for separate splicing of the DuoTrack® copper and fiber-optic cable in a waterproof joint housing, which is protected by a lockable stainless steel case alongside the road bed and allows the brachning of up to four cables, without the need of an additional cabinet.

Quick to install and improved total cost of ownership
The DuoTrack® cable is directly clamped to the track as this innovative cable has been designed to meet the high mechanical and thermal requirements of a rail base installation. This way of installation is considerably quicker than the traditional method, in where several individual cables are laid in a concrete trough, and also more economic due to the elimination of time-consuming and costly civil engineering works.

The DuoTrack® laying train developed by Contec in partnership with Nexans ensures that work can be carried out smoothly and easily. It consists of a laying vehicle, cable payoffs, a tension balancer and a laying arm which places the cable in the correct position. Contec also provides the mounting devices, consisting of a DuoTrack® clamps specially designed for the cable, cable turnouts and a special tool for mounting of the DuoTrack® clamps which are individually tested at a pressure force of 200 N.

In this way, DuoTrack® improves total cost of ownership (TCO) considerably – savings of 50 per cent are expected – and offers an attractive opportunity for equipping non-electrified regional railways with modern control and communication technology fast and economic.

Modernisation of the Odenwald railway
The DuoTrack® system has proven its capability in long-term tests and interference evaluation on a test track in Northern Germany, as well as in numerous laboratory tests. Nexans has just received type approval for the DuoTrack® cable from the German Federal Railway Authority (EBA).  Nexans and Contec are now applying the DuoTrack® system to approximately 100 km of track as part of the "Odenwald railway modernization project" and this pilot project will prepare the ground for the regular deployment of this innovative technology for standard use by the German Railways network (DB Netz AG).

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