ARMORED SUBMERSIBLE Power CABLE > 자유게시판

Over time, creep can happen and failure of a number of of the protecting lead (Pb) walls between conductors. As such, lead (Pb) can creep at ambient temperature (e.g., 25 levels C.) when pressure of a number of megapascals (MPa) is utilized. As such, they can be applied thickly as much as 0.5 mm or 0.020 inch. For example, an antioxidant might be an additive. For example, an amount of carbon black can be an additive (e.g., about 0.01 to about 1 percent by weight). As an example, a catalyst might be an additive. In such an instance, the colored phases (e.g., section assemblies) may be more readily spliced, connected, and so on. (e.g., noting that a cable may be of the order of one hundred meters or more, including of the order of a thousand meters or extra). For example, consider a 3 part cable that features part assemblies where each cushion layer of a respective section meeting is colored otherwise to establish the corresponding phase (e.g., purple, white, black, inexperienced, and so forth.). The third materials 2416 can kind a cushion layer about the second material 2414. The third materials 2416 can have a hoop stress such that it helps to retain form, which can, in flip, help to retain form of the second material 2414. The third materials 2416 could be formulated for at the least some quantity of crosslinking after extrusion by the extruder 2417. As an example, crosslinking can happen at least partly in situ whereas the meeting formed through the extruder 2417 is ready to be armored and/or in any other case processed.

While these wraps provide some safety, for optimum effectiveness, thickness tends to matter. Such a layer can help protect a copper conductor (e.g., and/or insulation) from substances resembling hydrogen sulfide gasoline and will improve the maximum operation temperature of a cable. The Young's modulus of lead (Pb) is roughly 16 GPa, which is relatively low for a steel (e.g., copper (Cu) has a Young's modulus of roughly 117 GPa). Where a cable includes EPDM insulation adjoining to a copper conductor, a lead (Pb) layer may be positioned over the EPDM insulation and a fabric tape or a braid (e.g., a braided fiber) may be placed over the lead (Pb) layer as a manufacturing support to minimize distortion of the lead (Pb) layer during armoring. To reduce this damage, as mentioned, a taped or braided fiber layer might be utilized over a lead (Pb) layer to provide resistance to damage from the armoring process. Referring once more to the cable seven hundred of FIG. 7, in such an example, a taped or braided protective layer over a lead (Pb) barrier may be replaced by a solid extruded protecting layer.

As proven in FIG. 12, the cable seven-hundred is flatter than the cable 1200 because the cable 1200 has bulged in the middle as a consequence of power that has distorted lead (Pb) barrier layers of the cable 1200. A flatter cable can sit higher on a reel, as well as, for instance, provide a extra commonplace and higher clearance during set up and as soon as put in. Cable nearer to a heart (e.g., rotational axis) of a reel might be beneath drive where such pressure may cause a number of edges of armor to dig-in. The armor wrapping process applies power. As talked about, numerous parameters of a manufacturing process can be tailor-made to extend the crosslinking fee to thereby obtain a desired quantity of crosslinking (e.g., a desired crosslink density) of XLPE during the manufacturing course of, which may assist to guard a lead (Pb) barrier layer from a number of subsequent processes (e.g., armoring, rolling on a spool, and so forth.).

For example, a pump system can embrace a pump; a submersible electric motor operatively coupled to the pump; and a power cable for delivery of electrical energy to the submersible electric motor, where the facility cable includes a conductor, a lead (Pb) barrier layer disposed concerning the conductor, a cushion layer disposed about the lead (Pb) barrier layer where the cushion layer includes crosslinked polyethylene (XLPE), and metallic armor wrapped in regards to the cushion layer. As an example, a way can embrace extruding polyethylene a couple of lead (Pb) barrier layer disposed about a conductor to form an meeting; armoring at the least one of many assemblies with metallic armor to kind a cable; and operatively coupling the cable to a submersible electrical motor. For example, the cushion layer 760 will be formed by extrusion of material about the exterior surface of the metallic shield 750, which generally is a lead (Pb) layer. A cable that features an extruded cushion layer could also be suitable for use for a number of set up and retrieval runs. A cable can include armor to impart mechanical integrity. Such an strategy can, for instance, assist cut back threat of bulging on account of deformation of lead (Pb) and thereby assist to take care of the integrity of the armor 780. A more symmetrical cable might also carry out higher than a cable the place each conductor has deformed lead (Pb) thereabout where the amount of deformation of lead (Pb) can differ for one or more of the conductors.