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Article | REF: D2660 V1

Carbon in electrical engineering

Authors: Michel COULON, Conrad REYNVAAN, Jacques MAIRE

Publication date: March 10, 1994 | Lire en français

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    3. Fixed and sliding electrical contacts

    There are two main types of contact [20][21] :

    • fixed contacts with separation perpendicular (opening contacts) or parallel (switches, circuit breakers) to the contact surface;

    • sliding contacts :

      • in one case, the surfaces of the two elements in contact are reduced and permanently used (brushes on commutator and bushes),

      • in another case, a single surface is reduced and always rubbing against the surface of a virtually infinite element (rubbers), the surface in contact never being the same.

    In these applications, the advantage of carbon and, more often, graphite is that they don't...

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