We often see some very large root very color cable when we are outside, we checked to know that this cable is called cross-linked polyethylene insulated cable, then why so many people use this cross-linked polyethylene insulated cable? What are the advantages, and PVC insulated cable compared to that kind of cable, the following we say the advantages of cross-linked polyethylene insulated cable is what? Let's take a look!

What are the advantages of cross-linked polyethylene insulated cables?

Long-term working temperature is higher; mechanical properties are better; anti-aging ability is stronger.

XLPE or cross-linked polyethylene is a thermosetting insulation material.

Cross-linked polyethylene insulation uses a chemical or physical scheme that allows the polyethylene molecules to change from a linear molecular structure to a three-dimensional network structure, effectively protecting the cable and making it stronger.

The change from a thermoplastic material to a thermosetting material allows the working temperature to be increased from 70°C to 90°C, effectively improving the heat resistance of the material.

The polyethylene (PE) material itself has excellent dielectric strength, high insulation resistance and low loss factor at all frequencies, making it an ideal insulator, but its temperature range is limited. Cross-linking PE into XLPE increases the temperature range of the insulation while maintaining electrical properties.

21/35kV MEDIUM VOLTAGE XLPE INSULATED MULTI-CORE STEEL TAPE ARMOURED CABLE

XLPE raw material pellets

The heat resistance of cables insulated with cross-linked polyethylene is higher than that of polyvinyl chloride. It can be used at 90°C for a long time and up to 250°C for short circuit;

High insulation resistance, small dielectric loss angle tangent, basically does not change with temperature;

Good abrasion resistance and resistance to environmental stress cracking.

Once cross-linked polyethylene is burned up by fire, it will produce carbon dioxide and liquid, while PVC insulated cable will emit harmful gas hydrogen chloride when burned up by fire; thus, cross-linked polyethylene insulated cable is superior to PVC insulated cable.

In addition, the density of cross-linked polyethylene is about 40% lower than that of PVC, and the weight of cross-linked polyethylene is much lighter than that of PVC, which effectively reduces the burden of overhead lines.