In telecommunication, a filled cable is a cable that has a nonhygroscopic material, usually a gel, inside the jacket or sheath. Telecommunication is the extension of communication over a distance. ... A cable is two or more wires bound together which may be bare or covered or insulated. ... A gel is an apparently solid, jellylike material formed from a colloidal solution. ... The word sheath has a number of related meanings in English. ...
The nonhygroscopic material fills the spaces between the interior parts of the cable, preventing moisture from entering minor leaks in the sheath and migrating inside the cable.
A metallic cable, such as a coaxial cable or a metal waveguide, filled with a dielectric material, is not considered as a filled cable. Coaxial cable is an electrical cable consisting of a round conducting wire, surrounded by an insulating spacer, surrounded by a cylindrical conducting sheath, and usually surrounded by a final insulating layer. ... In physics, optics, and telecommunication, a waveguide is a structure that confines and guides a propagating electromagnetic wave. ... The electrons in the molecules shift toward the positively charged left plate. ...
Cable failures in Auckland, New Zealand, in 1998 highlighted the need for a means to determine whether existing and new underground cables and joints are likely to suffer from thermomechanical damage.
To determine the cable conductor force coefficient, a sample length of cable is held at a constant length, loaded with current to achieve the rated conductor temperature rise, and the compressive load developed in the conductors measured.
The temperature rise due to current loading in a cable causes the conductors to expand, and if the cable is buried directly in the ground, the conductors tend to expand into the joints or cable terminations.
The cable is formed by extrusion of the sheath over the twisted core conductors after insertion of the spacers, and is vacuum corrugated after extrusion, the corrugator being specially formed and operated so as to accommodate the locations whereat the spacer ends engage with and locally deform the extruded sheath.
The gas insulated cable according to the present invention is thus formed entirely under factory conditions and it can readily be arranged that the gas insulation voids in the cable are free of contamination both during manufacture of the cable and thereafter.
The layed-up cable core assembly is pulled off a reel 10 by means of a proprietary "caterpuller" device 11 which feeds the cable cores to a cleaning station 12 where hot, de-ionized water is sprayed under pressure at the cores.
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