| 摘要 |
FIELD: electricity.SUBSTANCE: invention relates to the field of electrical engineering and may be used for design of symmetric and optical communication cables within a shared network or structured cable systems. In a symmetrical four-pair cable, comprising strands in polymer insulation, a breaking cord and an outer polymer shell, each symmetric pair is separated from the neighbouring symmetric pair with an introduced hollow polymer tube, as a result of which a layer is created from four polymer tubes and four symmetric pairs, separated from each other with hollow polymer tubes at the same time, and this layer is twisted with a large pitch around the central hollow polymer tube, the outer diameter of which is equal to two diameters of the symmetrical pair, besides, each symmetrical pair is placed into a polymer perforated tape with coverage of edges along the entire length of the cable, and the hollow central tube and hollow tubes between symmetric pairs have identical external diameter.EFFECT: invention reduces mutual impact between symmetric pairs due to their mutual arrangement by insertion of hollow polymer tubes.1 dwg |
