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Special-structure environment-friendly power cable for transformer connection

An environmentally friendly technology for power cables, applied in the field of 12/20kV and above power cables, can solve the problems of waste of resources, low utilization rate of conductor interface, etc., to avoid conductor burrs, improve heat dissipation effect and current carrying capacity, and increase contact area Effect

Pending Publication Date: 2022-03-04
SHENZHEN DONGJIAXIN CABLE&WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional process adopts strand stranding and compact forming, due to the existence of the conductor skin effect, the overall utilization rate of the conductor interface is still low
In addition, due to the need to extrude the semi-conductive cross-linked polyethylene, the waste of resources is caused.

Method used

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  • Special-structure environment-friendly power cable for transformer connection

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Embodiment Construction

[0012] Below in conjunction with example the present invention is described in further detail.

[0013] Such as figure 1 As shown, this embodiment describes a special structure environment-friendly power cable for transformer connection, the voltage level of this cable is 12 / 20kV, and the nominal cross-sectional area is 50mm². The special structure environment-friendly power cable for transformer connection, from the inside to the outside, is: composite structure filling core 1, concentric conductor 2, XLPE insulation layer 3, composite shielding layer 4, low-smoke halogen-free sheath 5. The filling core is located at the center of the cable, and the concentric conductor, XLPE insulation layer, composite shielding layer and low-smoke zero-halogen sheath are laid out layer by layer. Among them, the composite structure filling core 1 is made of 10 pieces of 1000 Dan Kevlar fibers extruded into an environmentally friendly low-smoke, halogen-free and flame-retardant polyolefin ma...

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Abstract

The invention relates to a special structure environment-friendly power cable for transformer connection, which belongs to the field of power transmission, and is mainly characterized by consisting of a composite structure filling core, concentric conductors, an XLPE (Cross Linked Polyethylene) insulating layer, a composite shielding layer and a low-smoke halogen-free sheath, and the concentric conductor, the XLPE insulating layer, the composite shielding layer and the low-smoke halogen-free sheath are arranged outside layer by layer. And the composite structure filling core is formed by extruding a 150 DEG C environment-friendly polyolefin material by adopting Kevlar fibers. The concentric conductors and the composite shielding layer are made of sparsely-wound annealed soft copper wires and wrapped annealed soft copper strips. And the XLPE insulating layer is made of an environment-friendly crosslinkable polyethylene insulating material. And the low-smoke halogen-free sheath is made of a 90-DEG C environment-friendly polyolefin material. The cable is reasonable in structural design, and has the advantages of reduced conductor skin effect, improved effective cross section utilization rate, improved heat dissipation performance, good shielding performance, flame retardance, environmental protection and the like.

Description

technical field [0001] The invention relates to a power cable, in particular to a special structure halogen-free low-smoke flame-retardant XLPE insulated environment-friendly power cable for transformer connection, especially suitable for power cables of 12 / 20kV and above. Background technique [0002] The conductor structure of traditional medium-voltage power cables for transformer connection is composed of tightly pressed circular copper conductors or aluminum conductors. The conductors are stranded in strands and then pressed into shape. The conductor of this process is compacted, but due to the influence of the process level and the characteristics of the copper conductor itself, there will always be more or less burrs on the surface of the conductor. In order to eliminate the impact of such burrs on the cable structure, the traditional process extrudes a layer of semi-conductive cross-linked polyethylene on the surface of the conductor to form an equalized potential to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/00H01B9/02H01B9/04H01B7/42
CPCH01B9/006H01B9/04H01B7/421H01B9/021H01B9/022H01B9/025
Inventor 林东鸿葛曙光
Owner SHENZHEN DONGJIAXIN CABLE&WIRE
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