Cu XLPE PVC Frls Cable 400mm², 300mm², 240mm² power cables are core equipment in high-voltage power transmission and distribution systems. With excellent electrical performance, flame-retardant characteristics and structural stability, they are widely used in industrial, municipal, high-rise building and other scenarios with strict requirements on safety and reliability.​ From the perspective of model analysis, "Cu" represents that the conductor material is high-purity electrolytic copper, which has high conductivity and low resistance. It can effectively reduce energy loss during current transmission and ensure efficient transmission of high-power electricity. "XLPE" refers to cross-linked polyethylene insulation layer. After special cross-linking process, its molecular structure forms a three-dimensional network structure, which has much better temperature resistance (long-term working temperature up to 90℃, and can withstand 130℃ high temperature in case of short circuit), insulation strength and chemical stability than ordinary polyethylene. It can maintain stable insulation performance even in harsh environments such as humidity and high temperature. "PVC Frls" refers to flame retardant low smoke polyvinyl chloride sheath. This kind of sheath produces little smoke and low toxicity when burning, and can effectively delay the spread of fire. It meets the high-level requirements of fire safety, especially suitable for crowded places and enclosed spaces.​ In terms of specification parameters, 400mm², 300mm² and 240mm² are the cross-sectional areas of conductors, which directly determine the current-carrying capacity and applicable power range of the cable. The 400mm² cable has the largest current-carrying capacity and can meet the needs of high-voltage and large-capacity power transmission in large industrial plants, power stations and other places; the 300mm² cable is suitable for medium-sized substations, urban power grid trunk lines and other scenarios; the 240mm² cable is often used in power distribution trunks of high-rise buildings, main cables of large commercial complexes, etc. All of them comply with the International Electrotechnical Commission (IEC) and relevant national standards, with rated voltages mostly 10kV, 35kV and other medium and high voltage levels, which can adapt to distribution systems of different voltage levels.​ In terms of performance characteristics, the XLPE insulation layer of this series of cables has excellent aging resistance and corona resistance, and can withstand high-voltage impact for a long time without breakdown; the PVC Frls sheath not only has flame retardant and low smoke properties, but also has good weather resistance, corrosion resistance and mechanical strength, which can resist external friction, extrusion and chemical erosion. In addition, the structural design of the cable is rigorous. The conductor adopts multi-strand copper wire stranding technology, which enhances flexibility and fatigue resistance, and is convenient for bending and laying; the insulation layer and the sheath are closely combined, effectively preventing moisture and impurities from entering, ensuring the long-term stable operation of the cable.​ In terms of application scenarios, 400mm² cables are often used in industrial places that need large-capacity power transmission such as power plants and large chemical plants, as connecting cables or trunk lines between generators and transformers; 300mm² cables are suitable for municipal engineering such as urban underground power grids and highway lighting systems, and can work reliably in complex underground environments; 240mm² cables are widely used in power distribution shafts of super high-rise buildings, power distribution systems of large shopping malls, etc. Their flame-retardant and low-smoke characteristics can gain valuable time for personnel evacuation and rescue in case of fire.​ To sum up, Cu XLPE PVC Frls series large-section power cables, through high-quality materials, advanced technology and targeted design, meet the needs of high-power power transmission while maximizing electrical safety, and are indispensable key equipment in modern power systems.