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Defect analysis of carbon fiber wires

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Defect analysis of carbon fiber wires

作者: Release Date: 2018-05-23 Author: Click:

Defect type: disconnected


Brief introduction: The capacity of a 220kV power transmission line was increased. The original 2 × LGJ-300 / 25 steel core aluminum stranded conductor was replaced by 240/30 double split carbon fiber composite core aluminum stranded conductor. Henan wire and cable broke during the construction of the wires , and all of the wires using aerial crimping were broken from the crimping area (near the nozzle) of the tension clamp after hanging the wire.


Cause analysis: After relevant tests, anatomical disconnection, tension clamps and other methods to verify the cause of disconnection, from the analysis of the test conclusions, the main problem is the failure of the carbon core radial pressure test of carbon fiber conductors. The national standard GB / T 29324-2012 and the national network standard Q / GDW 1851-2012 require the radial pressure resistance standard to be "composite mandrels with a cut length of not less than 100mm, and smoothly loaded at a loading speed of 1mm / min to 21mm / min Damage, the composite mandrel should withstand a pressure of not less than 30kN, and its end should not crack and peel ""), but the tested carbon fiber wire did not meet this requirement, and the carbon fiber core produced by the supplier of this type of wire could not meet the standard requirements At present, the national standard on the radial pressure test requirements of carbon rods. Most domestic suppliers can only meet the specifications of Φ7.5 and above carbon rods. It is difficult to achieve the radial pressure test of Φ6 carbon rods. The requirement is 100mm not less than 30kN. Based on the relevant test conclusions and investigations, the analysis of the reasons for wire breakage mainly focuses on the possible overvoltage and other crimping process problems during the crimping process, as well as the quality problems of the wire products.

Consequences: disconnected

Recommendation: During the construction process of carbon fiber conductors, the relevant regulations in the "Construction Process and Acceptance Guidelines for Carbon Fiber Composite Core Overhead Conductors (Trial)" should be strictly implemented.

河南电线电缆

Lateral scratch


Defect description: Capacity expansion of a 500kV transmission line. The original LGJ-400 / 35 steel core aluminum stranded wire was replaced with JLRX / F2A-460 / 40-26 carbon fiber wire. Wire wear and tear were found during the completion of the line.

Cause analysis: The lead was scratched and scratched by the soft aluminum on the outer layer of carbon fiber after being sharpened by sharp objects during transportation and display.

Consequences: The appearance quality will be affected, and corona will be generated. In severe cases, the wire will be burnt or even cause a disconnection accident.

Recommendation: After the goods arrive, they should be checked and accepted one by one, and after the wire is unfolded, they should be checked and accepted one by one.


URL of this article: http://herzheart.com/南方双彩网/375.html

Keywords: Henan wire and cable , Zhengzhou wire and cable , Henan wire and cable manufacturer

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