Increasing Rail System Performance
TE Connectivity (TE) and the French National Railway company worked together to design tailor made dropper and a specific tool to ease the installation.
The French National Railway company is a pioneer in development and construction of high speed railway lines. In order to insure the dependability of its facilities, TE and and the national rail player worked in details together to develop an innovative dropper.
Droppers have a fundamental role in the overall railway system performance since they are key connectors of the catenary.
The droppers used by the French National Railway were articulated at upper and lower parts, they had a good mechanical behaviour but the articulations led to poor electrical performance. To overcome this loss of electrical contact between the messenger and the contact wire, a distribution connection was installed every 200 meters (maximum). The extra weight of the distribution connection could locally bend the contact wire which limited the speed of the train.
The French National Railway company and TE engineering teams worked together to an innovative solution that would insure high mechanical behavior without lower the electrical performance.
They designed a dropper that provides two mechanical and electrical functions without any screw or bolt.
In order to warranty high mechanical behavior the dropper is still articulated at the upper and lower sides. Nevertheless a binding cable has been added at both sides to make sure to consistently maintain an electrical contact between messenger and contact wires.
TE also developed a specific tool named SIMAGRIF to ease the installation of the new innovative dropper.
As a worlwide pioneer in development and construction of high speed railway lines, the national railway company needed to insure the reliability and the speed of railway lines.
With decades of expertise and experience in designing and supplying products for demanding rail applications, TE worked on developing, testing and manufacturing this new dropper along with this new tool.
TE's Simel droppers have been installed in the field for more than 20 years and are still offering reliable performances.
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