Prefabricated cable and cable assembly using prefabricated cable

Abstract

The invention relates to a prefabricated cable and a cable assembly using the prefabricated cable. The prefabricated cable comprises a cable wire provided with a cable core and a shielding layer. At least one end of the cable wire is provided with a shielding layer grounding wire connected with the shielding layer. A first plastic packaging shell is injection-molded at the connecting part of the shielding layer grounding wire and the shielding layer and the periphery of the corresponding cable core. The shielding layer of the prefabricated cable is led out via the shielding layer grounding wire before leaving the factory. The shielding layer is led out by the shielding layer grounding wire before leaving the factory, and then the first plastic packaging shell is injection-molded at the connecting position of the shielding layer grounding wire and the shielding layer and the periphery of the corresponding cable core. The first plastic packaging shell comprises insulating and sealing performance of the lead-out position of the shielding layer, and structural strength of the corresponding position can also be guaranteed simultaneously. The shielding layer grounding wire is directly grounded in field use without performing field stripping of the shielding layer so that field wiring efficiency is enhanced, and potential fault left by secondary wiring can be also be avoided.

Description

technical field [0001] The invention relates to a prefabricated cable for signal transmission and a cable assembly using the prefabricated cable. Background technique [0002] In 2012, the State Grid Corporation of China put forward the "Key Technology Research Framework for New Generation Smart Substations", which is a new plan and research for the future development of the smart grid project currently being vigorously constructed by the State Grid Corporation of China. With the goal of "high system integration, reasonable structure layout, advanced technology and equipment, economy, energy saving and environmental protection", it adopts "high reliability, high integration, long life" intelligent equipment, and has "support for integrated control, integrated operation and maintenance, plug and play Ready-to-use, panoramic information” and other functions, with the functional characteristics of “full station information digitization, communication platform networking, inform...

AI Technical Summary

Problems solved by technology

[0003] The cables in the prior art are all wire-type cables made on site. The cables include a shielding layer and a metal armor layer on the cable core. The laying and connection of conventional substation cables are carried out on site after the equipment is in place. Strip the wires, and then press the terminals on the shielding layer and the metal armor layer for grounding connection. This kind of operation needs to seal and insulate the stripped cables through adhesive tape. On the one hand, this operation has a long construction period and will affect the progress of cable laying. On the other hand, the on-site sealing and insulating treatment cannot guarantee the quality of operation, nor can it be accurately tested, and it is easy to leave quality risks

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