1. Has good high temperature resistance: XLPE insulation uses chemical or physical methods to change the structure of polyethylene molecules into a three-dimensional network structure. The three-dimensional network structure has good heat resistance and can be used in Long-term work at a high temperature of 90 degrees Celsius, the lifespan can be as long as 40 years. 2. It has good insulation performance: the performance of polyethylene not only retains the insulation performance of cross-linked polyethylene, but also has a further improvement in insulation resistance. 3. High mechanical properties: hardness, stiffness, wear resistance and impact resistance have been improved 4. Chemical resistance: XLPE itself has strong acid and alkali resistance and oil resistance 5. Environmental protection: Since the products of cross-linked polyethylene combustion are water and carbon dioxide, the environmental pollution is low, and it meets the requirements of fire safety. 6. The maximum rated temperature of the cable conductor is 90°C, and the maximum temperature of the cable conductor during short circuit (the longest duration does not exceed 5S) does not exceed 250°C.
A) during normal operation of cable, the maximum conductor temperature shall be 70℃ for PVC insulation and 90℃ for XLPE insulation. B) Maximum temperature of conductor during short circuit (maximum duration not exceeding 5 seconds) : PVC insulation -- 160℃ for conductor cross section ≤300mm2, 140℃ for conductor cross section > 300mm2; Crosslinked PVC insulation at 250℃. C) When laying cables, the ambient temperature shall not be less than 0℃, and the minimum allowable bending radius is as follows: Single core cable: unarmored 20D, armored 15D Multi-core cable: 15D for unarmored, 12D for armored Where: D- actual outer diameter of cable. D) Cable breaking force: Aluminum core cable: 40×S (N) Copper core cable: 70×S (N) Note: S is the total cross-sectional area of the conductor
