21/35kV Medium Voltage Cable
21/35kV Medium Voltage Cable
Copper core/aluminum core XLPE insulated PVC/PE sheathed power cables, suitable for fixed installations in 21/35kV, 18/30kV (36/35kV) and below distribution networks or industrial equipment.
The 21/35kV XLPE Power Cable (also covering 18/30kV systems) is engineered for medium-to-high voltage power transmission. It is widely utilized in urban grid expansions, industrial substations, renewable energy integration, and large-scale infrastructure networks.
Utilizing a triple-extruded dry curing process for its XLPE (cross-linked polyethylene) insulation, this Low Voltage Power Cable provides exceptional dielectric strength and thermal stability. It is available in both copper and aluminum conductor configurations, offering flexible cost-to-performance optimization for global engineering projects.
Conductor: Number of conductors 1 or 3. The conductors shall comply with the requirement given in IEC.
Insulation: XLPE (Cross-linked Polyethylene) according to IEC.
Sheath: PVC (Polyaluminium Chloride) according to IEC.
Metal Screen: Copper Tape Screen.
Characteristics:
Conductor Temperature: Maximum conductor temperature in normal use: 90°C.
Max. Short-circuit Temperature: Maximum shall not exceed 250°C (5s Max. Duration).
Installation Temperature: Ambient temperature under installation shall not be below 0°C.
Minimum Bending Radius: For Three Core Cable: ≥15D. For Single Core Cable: ≥20D. (D = Diameter of cable)
Key Electrical & Engineering Advantages:
– High Dielectric Strength: The XLPE insulation is specifically designed to resist electrical breakdown under continuous high-voltage stress.
– Superior Thermal Stability: Supports continuous operating temperatures up to 90°C and short-circuit temperatures up to 250°C, making it ideal for heavy-load transmission.
– Low Transmission Loss: Optimized conductor stranding reduces electrical resistance, ensuring efficient energy delivery over long distances.
– Strong Mechanical Protection: Available with specialized armoring to withstand soil pressure, external impacts, and the stresses of underground installation.
Application Scenarios:
– Utility Power Grids: Urban power transmission and substation interconnection.
– Industrial Power: High-load supply for factories, refineries, and mining operations.
– Renewable Energy: Main export cables for wind farms and solar power plants.
– Infrastructure: Power systems for railways, airports, and tunnels.
– Underground Systems: Direct burial or duct installations for high-voltage urban circuits.
Built for Reliable Bulk Supply & Power Project Execution:
– Stable High-Voltage Performance: Specifically tested to maintain consistent dielectric integrity under long-term high-voltage load.
– Compliance with Global Standards: Manufactured in strict accordance with IEC 60502-2 and IEC 60840, ensuring suitability for international EPC tenders.
– Conductor Flexibility: Copper – Ideal for high conductivity and minimum energy loss. Aluminum – A cost-efficient solution for long-distance, high-volume project requirements.
– Engineering-Grade Customization: Options for armored/unarmored structures, specific metallic screen thicknesses, and specialized LSZH or fire-resistant outer sheaths.
– Designed for Longevity: Optimized for a service life of 20-30 years within utility and industrial networks.
Why Choose Us as Your High Voltage Cable Supplier:
– Industrial-Scale Manufacturing: Equipped to handle the high-capacity output required by national grids and major infrastructure projects.
– Comprehensive Project Support: We provide technical datasheets, cable sizing calculations, and detailed installation guidance.
– Rigorous Quality Control: Every cable undergoes high-voltage withstand testing, partial discharge testing, and insulation aging verification before shipment.
– Expert Logistics: Using heavy-duty reinforced drums and project-specific labeling to ensure safe delivery and easy on-site management.
