IEC 60502-2 12/20 (24) Kv Al/XLPE/Lat/HDPE 3X1X150 mm2 Torsades Cable

12kV Phase-to-Ground: Suitable for grounded systems, ensuring safe operation in residential and industrial areas where touch voltage limits are critical.

20kV Phase-to-Phase: Ideal for standard three-phase distribution in utility grids and industrial complexes.

24kV Maximum Operating Voltage: Provides a safety margin for transient voltage spikes, common in grids with renewable energy integration or heavy machinery.

Three Phase Conductors: Each 150mm² conductor carries one phase (L1, L2, L3) of the three-phase system, ensuring balanced current distribution. This symmetry minimizes power loss and reduces EMI.

150mm² Cross-Section: Rated for continuous currents up to 250A, the 150mm² size efficiently handles the load demands of industrial plants, large commercial facilities, and substation feeder lines without overheating.

Twisted (Torsades) Arrangement: The conductors are twisted at a precise pitch (typically 150–200mm) to cancel out electromagnetic fields, reducing EMI and crosstalk between phases. This design also enhances flexibility, simplifying installation in tight spaces or around obstacles.

Electrical Conductivity: Aluminum offers a conductivity of 377 MS/m, sufficient for 12/20(24)kV transmission with minimal power loss. While copper has higher conductivity (58 MS/m), aluminum’s lower density (2.7 g/cm³ vs. copper’s 8.96 g/cm³) reduces the cable’s weight by up to 60%, easing handling and installation.

Stranded Construction: Each conductor is composed of multiple stranded Aluminum Wires, twisted together to enhance flexibility. This design allows the cable to bend around corners or through conduits without fracturing, a critical advantage in industrial settings with complex routing.

Corrosion Resistance: Conductors are treated with a zinc coating and an oxide layer, protecting against corrosion from moisture, industrial chemicals, and soil contaminants. This ensures long-term performance in underground or wet environments.

Cost Efficiency: Aluminum is approximately 60% cheaper than copper, making the cable a cost-effective choice for large-scale projects, such as utility grid expansions or industrial park electrification.

Thermal Stability: XLPE operates reliably across a temperature range of -40°C to 90°C, far exceeding the performance of traditional paper or PVC Insulations. This stability ensures the cable functions in freezing cold climates (e.g., northern industrial zones) and hot environments (e.g., desert solar farms).

Dielectric Strength: With a dielectric strength of 20kV/mm, XLPE insulation prevents electrical breakdown at 12/20(24)kV, even in moist or contaminated conditions. This is critical for avoiding short circuits and ensuring system safety.

Moisture Resistance: The cross-linked molecular structure of XLPE creates a dense, impermeable barrier that repels water. This eliminates water-induced treeing (insulation degradation), a common cause of failure in Mv Cables with porous insulations.

Chemical and Aging Resistance: XLPE resists degradation from oils, solvents, and atmospheric pollutants, ensuring a service life of 30+ years. It also withstands thermal aging, maintaining performance even after decades of continuous operation.

Standard Thickness: 3.4mm for each conductor, providing sufficient dielectric protection without excessive rigidity. This balance allows the cable to remain flexible for installation while meeting IEC 60502-2 insulation requirements.

Uniform Application: The insulation is extruded uniformly around the conductor, eliminating air gaps or 厚薄不均 that could create weak points in dielectric performance.

Electromagnetic Shielding: The aluminum tape, wrapped helically around the Insulated Conductor with a minimum overlap of 15%, contains the electromagnetic field generated by the current-carrying conductor. This prevents EMI from interfering with nearby communication cables or sensitive equipment (e.g., industrial sensors).

Grounding Path: The aluminum tape is connected to a ground conductor, diverting any induced currents or fault currents away from the insulation. This protects the cable from damage during electrical faults and ensures compliance with safety standards.

Mechanical Protection: The tape adds a layer of abrasion resistance, protecting the XLPE insulation from damage during installation or handling.

Weather Resistance: HDPE is impervious to rain, snow, and UV radiation, making the cable suitable for outdoor installation (e.g., Overhead Lines, exposed trenches). UV stabilizers in the sheath prevent degradation from sunlight, extending service life in sunny climates.

Abrasion and Impact Resistance: The sheath’s high tensile strength (20–30 MPa) and impact resistance protect the inner layers from damage during installation (e.g., dragging over rocks) or from wildlife (e.g., rodent 啃咬).

Chemical Resistance: HDPE resists oils, fuels, and industrial chemicals, making the cable suitable for installation in refineries, chemical plants, or industrial zones with contaminated soil.

Water Blocking: The sheath’s low water absorption rate (<0.01%) prevents moisture ingress, safeguarding the aluminum conductors and XLPE insulation from water-induced corrosion or degradation.

Electrical Testing: Includes dielectric strength tests (100kV for 1 minute), partial discharge measurements (<10 pC at 1.73U0), and insulation resistance tests (>1000 MΩ).

Mechanical Testing: Verifies tensile strength, elongation at break, and flexibility (bend tests at 12× cable diameter).

Environmental Testing: Validates performance under temperature cycling (-40°C to 90°C), water immersion, and UV exposure.

Fire Resistance: Meets IEC 60332-3 for flame propagation, ensuring minimal fire spread in case of ignition.

Reel Handling: Cables should be stored on wooden or steel reels in dry, covered areas to prevent moisture damage. Reels must be rotated carefully to avoid kinking the cable.

Temperature Considerations: Installation should be avoided in temperatures below -20°C, as cold can reduce the cable’s flexibility and risk sheath cracking.

Minimum Bending Radius: The cable must be bent with a radius of at least 12× its outer diameter (typically 150mm for 3X1X150mm²) to prevent insulation damage.

Avoiding Tension: Installation tension should not exceed 10kN to prevent conductor stretching or sheath deformation.

Terminations: Use IEC 60502-2 compliant terminations, ensuring a water-tight seal and proper shielding grounding. Terminations must be rated for 12/20(24)kV and installed by certified technicians.

Joints: Factory-made or heat-shrink joints are recommended to maintain insulation and shielding integrity. Joints must be tested for dielectric strength before energization.

Substation Connections: Links substations to distribution lines, efficiently transmitting power from high-voltage grids to medium-voltage industrial and residential networks.

Urban Distribution: Routes power through cities, with its twisted design and flexibility simplifying installation in crowded underground ducts or overhead lines.

Manufacturing Plants: Powers heavy machinery, furnaces, and processing lines, with its EMI shielding protecting sensitive control systems.

Mining Operations: Withstands harsh conditions, including dust, moisture, and vibration, making it suitable for underground or open-pit mining power distribution.

Solar Farms: Connects solar inverter stations to the grid, handling the variable currents generated by photovoltaic systems.

Wind Parks: Transmits power from wind turbines to collection substations, with its weather-resistant HDPE sheath enduring outdoor exposure.