August 09, 2024
The full name of the cross-linked cable should be: cross-linked polyethylene insulated power cable.
Cross-linked polyethylene insulated power cable uses chemical or physical methods to transform polyethylene molecules from linear molecular structures to three-dimensional mesh structures, and thermoplastic polyethylene becomes thermosetting cross-linked polyethylene, thereby improving the aging resistance, mechanical properties and environmental resistance of polyethylene, and maintaining excellent electrical properties.
The maximum allowable long-term operating temperature of the conductor of cross-linked polyethylene insulated power cable is 90 degrees Celsius, which is higher than that of paper insulated cables, polyvinyl chloride insulated cables and polyethylene insulated cables. It has the advantages of light weight, simple structure, convenient use, chemical corrosion resistance and laying without drop restrictions.
Cross-linked cable is the abbreviation of cross-linked polyethylene insulated cable. Cross-linked cable is suitable for power transmission and distribution lines with industrial frequency AC voltage of 500KV and below. At present, most high-voltage cables use cross-linked polyethylene insulation.
How to distinguish silane cross-linking, irradiation cross-linking and peroxide cross-linking in cross-linked cables?
The main difference between these cross-linking methods is the difference in their chemical reactions. Silane crosslinking is generally a chemical crosslinking reaction carried out by silane coupling agent; peroxide crosslinking is a crosslinking reaction caused by the decomposition of peroxide to produce free radicals; irradiation crosslinking is nothing more than the use of irradiation energy to produce free radicals to trigger the crosslinking reaction
What are the specifications of crosslinked cables?
① Separate the trunk cable and branch cable to express: such as: trunk cable: FD-YJV-4*(1*185)+1*95?0.6/1KV
Branch cable: FD-YJV-4*(1*25)+1*160.6/1KV
The advantage of this expression method is that it can easily express the different branch specifications.
② Put the trunk cable and branch cable together to represent, such as: FD-YJV-4*(1*185/25)?+1*95/160.6/1KV
Compared with the above method, this method is simpler, but its shortcomings are also obvious, because it is limited to the branch cable with the same model and specification, and there is no way to represent the situation of different specifications of the branch. Now, we have mastered the method of distinguishing the trunk or branch.
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