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Sliding strips

Sliding strips are in continual contact with the catenary of overhead line systems (being pressed against the line by a pantograph) and convey electrical current to the interior of electrical powered wagons such as rail vehicles or buses. Both contact points (the catenary and sliding strip) are subject to wear in this respect. However, sliding strips are designed to exert minimum stress on the catenary, as their replacement is much less expensive. In addition to conventional sliding strips made of steel or copper, there has been an increase in the use of carbon sliding strips in recent years. These still have a metal mounting, the sliding strip, which establishes contact with the catenary, but they are made of graphite or a graphite and metal compound. This chiefly minimises wear on the sliding strip and the overhead line, and the quality of current transmission and security can also be influenced by employing specific recipes during the manufacture of carbon brushes.

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