XLPE insulated cables
XLPE insulated cable
is a suitable distribution network and other areas of the cable, PVC insulated cables with unparalleled advantages. Its simple structure, light weight, good heat resistance, load capacity, not melting, chemical resistance, high mechanical strength.
1, the definition
XLPE insulated cable is the use of chemical or physical methods, the cable insulation polyethylene molecules from the linear molecular structure into the main network molecular structure, that is, thermoplastic polyethylene into thermosetting cross-linked polyethylene, thereby greatly enhancing its Heat resistance and mechanical properties, reducing its shrinkage, making it no longer after melting heat, and maintain excellent electrical properties.
2, nature and advantages
Cross-linked polyethylene insulated cables
using peroxide cross-linking method, the polyethylene molecular linear molecular structure into a three-dimensional network structure, from the thermoplastic material into a thermosetting material, the working temperature from 70 ℃ to 90 ℃, significant Improve cable current carrying capacity. XLPE insulated cables have the following advantages:
XLPE mesh structure has a very good heat resistance. Under 300 ℃ will not decompose and carbonization, long-term working temperature up to 90 ℃, the hot life of up to 40 years.
XLPE maintained the original PE good insulation properties, and further increase the insulation resistance. The dielectric loss tangent is small, and little affected by the temperature.
Due to the establishment of a new chemical bond between macromolecules, XLPE hardness, stiffness, abrasion resistance and impact resistance are improved, thus making up for the PE vulnerable to environmental stress cracking the shortcomings.
XLPE has strong acid and alkali resistance and oil resistance, the combustion products are mainly water and carbon dioxide, less harmful to the environment, to meet the requirements of modern fire safety.
XLPE insulated cables are suitable for distribution networks, industrial installations or other areas requiring the large capacity for fixed laying on power transmission and distribution lines with AC 50Hz and rated voltage of 6kV ~ 35kV. The main function is to transport the power.
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