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Impact resistant compact cable

A cable and post-impact technology, applied in the field of cables, which can solve problems such as limiting elastic recovery of elastic materials, shape and size constraints of insulating layers, etc.

Inactive Publication Date: 2007-12-12
PRYSMIAN CAVI E SISTEMI ENERGIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] In addition, since the position of the metal sheath is on the radial outer circumference of the cable insulation layer, the material of said sheath will be permanently deformed under impact, which further limits the elastic recovery of the deformation of the elastic material, so that the insulation layer recovers its original Constrained by elasticity in shape and size

Method used

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Examples

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Embodiment Construction

[0087] Figure 1 shows a perspective view of a partial cross-section of a cable 1 according to the invention which is typically designed for use in the medium or high voltage range.

[0088] Here, the type of power transmission cable described is typically operated at a nominal frequency of 50 Hz or 60 Hz.

[0089] The cable 1 includes: a conductor 2 ; an inner semiconductive layer 3 ; an insulating layer 4 ; an outer semiconductive layer 5 ; a metal cover 6 ; and a protection unit 20 .

[0090] Preferably, the conductor 2 is a metal strip, preferably made of copper or aluminium. Alternatively, the conductor 2 comprises at least two wires, preferably copper or aluminum, twisted together according to conventional techniques.

[0091] The determination of the cross-sectional area of ​​the conductor 2 is related to the electric energy to be transmitted under the selected voltage. The cable according to the invention preferably has a cross-sectional area in the range of 16 to 100...

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Abstract

A cable for use in a predetermined voltage class, has a conductor; an insulating layer surrounding the conductor, the insulating layer having a thickness selected to provide a predetermined electrical stress when the cable is operated at a nominal voltage in said predetermined voltage class; and a protective element around the conductor having a thickness and mechanical properties selected to provide a predetermined impact resistance capability, the protective element having at least one expanded polymeric layer. The insulating layer thickness and the protective element thickness are selected in combination to minimize the overall cable weight while preventing a detectable insulating layer damage upon impact of 50 J energy. A method for designing a cable is also disclosed.

Description

Technical field: [0001] The present invention relates to cables, in particular to power cables for transmitting or distributing electrical energy at medium or high voltage. More specifically, the present invention relates to power cables designed to combine high impact resistance and compactness. Background technique: [0002] In this specification, the term "medium voltage" is used to refer to voltage values ​​typically from about 10kV to about 60kV, and the term "high voltage" is used to refer to voltages higher than 60kV (sometimes used in the technical field to refer to very high voltages, Defined as voltages above about 150kV or 220kV, even 500kV or more); the term "low voltage" refers to voltages below 10kV, typically above 100V. [0003] In addition, in this description, the term "voltage level" refers to a specific voltage value (eg, 10kV, 20kV, 30kV, etc.) within a corresponding voltage range (eg, low, medium, high voltage or LV, MV, HV). [0004] Cables for the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/18H01B7/17H01B1/00H01B7/282H01B9/02
CPCH01B9/02H01B7/189H01B7/17H01B7/18
Inventor 瑟奇奥·贝利法布里奇奥·多纳兹埃博托·巴尔吉西泽·比斯勒瑞卡洛·玛林
Owner PRYSMIAN CAVI E SISTEMI ENERGIA
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