Features of Irradiated XLPE Cables

Organic chemical cross-linked cables generally refer to the use of heat-polymerized raw materials for the insulating sleeves of cables. The more common raw material is high-density polyethylene (XLPE).
The whole process is to convert linear chemical formula high-density polyethylene (PE) raw materials into high-density polyethylene with a platform-type porous structure and split line structure according to a unique manufacturing method. To promote durability, the operating temperature is increased from 70°C to 90°C (or higher), and short circuit faults allow the temperature to be increased from 140°C to 250°C (or higher). The commoned xple cable that xlpe cable 150mm2、xlpe cable 4 core 120mm2、3x240mm xlpe cable、xlpe cable 240mm etc.

Characteristics of irradiation cross-linked cables: The embrittlement time of cable sheath raw materials focuses on its thermal embrittlement time, which is caused by thermal oxidation, catalytic cracking, and caustic oxidation in the cable sheath raw materials under heat. It is determined by the speed of chemical reactions such as cracking and addition polymerization. Therefore, the thermal embrittlement time of the cable sheath material will immediately affect the service life of the cable. According to the chemical reaction kinetic equation reasoning and human resources, thermal embrittlement is accelerated. The long-term allowable operating temperature of irradiation cross-linked cable measured in the test (20-30 years) is: power installation engineering cable YJV-0.6/1KV、4 core copper armoured cable、2.5mm 3 core armoured cable、flexible armoured cable. If the rated current operating temperature is 105 degrees, its thermal embrittlement time more than sixty years. 

High-density polyethylene cable sheath uses analytical chemical methods or physical methods to transform the molecular formula of the high-density polyethylene of the cable sheath from a linear chemical formula into a main porous structure chemical formula, that is, the high-density polyethylene of thermosetting plastics is transformed into The high-density polyethylene of polyurethane elastomer further improves its heat resistance and industrial equipment characteristics, reduces its shrinkage, makes it less likely to melt again after being heated, and maintains high-quality electrical equipment characteristics.