Special Cable Solution for High-Voltage Transmission Networks
Application Scenarios
Urban power grid upgrades, power supply for large industrial parks, grid integration of renewable energy power stations, and other medium-to-short-distance, high-reliability power transmission scenarios.
Core Requirements
Excellent flame retardancy, compact structure for easy installation, strong corrosion resistance, and high mechanical stress resistance.
Solution
- Material Upgrade:
Use flame-retardant cross-linked polyethylene (FL-XLPE) as insulation material. A composite flame-retardant system of magnesium hydroxide/aluminum hydroxide achieves a flame retardancy rating compliant with IEC 60332-3 Class A standards. - Structural Optimization:
- Conductor made of high-conductivity copper alloy with a segmental design to increase the fill factor to 93%.
- Three-layer co-extruded shielding structure (semiconductor shielding layer + insulation layer + semiconductor shielding layer) ensures uniform electric field distribution.
- Metal shielding layer adopts a composite structure of copper wire braiding + galvanized steel tape armor.
- Protection System:
- Outer sheath made of polyamide-polyurethane composite material, with chemical corrosion resistance meeting ISO 6722 standards.
- Addition of a carbon nanotube reinforcement layer to enhance crush resistance (able to withstand ≥20 kN/m pressure).
Implementation Results
After application in a coastal industrial park project:
- Cable installation density increased by 35%.
- Failure rate reduced to 0.12 instances/100 km·year.
- Expected service life extended to 35 years.
- Passed electromagnetic compatibility tests per CISPR 22 standards.
Smart Monitoring Expansion Function
Optional distributed temperature sensing (DTS) and partial discharge monitoring modules enable real-time operational status monitoring, achieving a warning accuracy rate of ≥90%.
Note: This solution complies with standards such as GB/T 12706-2020 and IEC 60502-2. Customized designs are available based on specific engineering requirements.
09/10/2025
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