How to choose overhead cables?
The selection of overhead cables directly determines the safety and economy of the power system. General power failures are caused by improper cable selection. How to choose various types of medium, high, and low voltage overhead cables such as PVC and cross-linked polyethylene on the market?
1.Core performance: Mechanical strength and weather resistance are indispensable
Mechanical performance: The tensile strength determines the safety of the circuit, and after continuous testing, the tensile strength of polyvinyl chloride (PVC) cables far exceeds that of polyethylene. When dragging during cable installation, PVC exhibits stronger resistance to fuzzing and damage, especially in contact with fittings or friction with tree branches. The insulation material PVC is still the first choice for cost-effectiveness, and cross-linked polyethylene XLPE improves mechanical properties through its molecular network structure, but the cost is high. PVC is still recommended as the first choice for low-voltage power grid renovation. Climate resistance: Multi layer protective layer design, inner layer cross-linked polyethylene insulation+outer layer PVC, bonded through co extrusion process to enhance UV and infrared reflection resistance. The corrosion resistance and service life of alloy conductors are extended.
2.Environmental adaptation
1. Meteorological sensitive areas with high ice and snow: choose steel core aluminum stranded wire with strong tensile strength. Strong wind areas: prioritize stranded wire structures, such as aluminum alloy stranded wire, with wind resistance and vibration resistance improved by 60% compared to single wire
2. For urban power grid renovation, overhead cables are a good choice
3. Economic optimization
3、 Technology and design tool upgrades: precise calculations to avoid human errors
The safety of electricity depends on cables. With the progress of the times and the innovation of technology, overhead cables are entering a new era of high strength and long service life. When making a selection, it is necessary to make a comprehensive decision based on safety, environment, and full cycle cost. For more technical parameters, please contact us for a complete selection manual