Cis Hta Cable 18/30kv 3X1X120mm2 240 mm2 Al/XLPE/HDPE Direct Burial Cable Underground Cable

18kv Phase-to-Ground: Suitable for single-phase applications or grounded systems, ensuring safe operation in residential and light commercial areas.

30kv Phase-to-Phase: Ideal for three-phase power distribution in industrial zones, substations, and large-scale infrastructure projects, where higher voltage transmission is required.

3X1X120mm²: Designed for medium-capacity power distribution, this size efficiently handles currents up to 250A. It is commonly used in urban underground networks, connecting residential neighborhoods, commercial districts, and small industrial units.

3X1X240mm²: Built for high-current applications, this larger size supports currents up to 400A, making it ideal for connecting substations, powering large industrial complexes, and integrating renewable energy sources (e.g., solar farms, wind parks) into the grid.

Electrical Conductivity: Aluminum provides excellent conductivity, ensuring minimal power loss during transmission at 18/30kv. While copper offers marginally higher conductivity, aluminum’s lower density (2.7 g/cm³ vs. copper’s 8.96 g/cm³) reduces the cable’s overall weight by up to 60%, easing installation in underground trenches.

Stranded Design: Each conductor features a stranded construction, with multiple small Aluminum Wires twisted together. This design enhances Flexibility, allowing the cable to bend around obstacles during installation without compromising structural integrity. It also improves durability by distributing mechanical stress evenly across the conductor.

Corrosion Resistance: The aluminum conductors are treated with a protective oxide layer and a specialized anti-corrosive coating, shielding them from moisture, soil chemicals, and electrolytic corrosion—critical for long-term performance in underground environments.

Thermal Conductivity: Aluminum’s high thermal conductivity ensures efficient heat dissipation, preventing overheating during peak load periods and extending the cable’s service life.

Dielectric Strength: XLPE insulation boasts a dielectric strength of over 20kV/mm, enabling it to withstand the 18/30kv voltage without breakdown. This ensures safe operation even in moist or contaminated soil conditions.

Thermal Stability: XLPE operates reliably across an extreme temperature range of -40°C to 90°C, far exceeding the performance of traditional paper or PVC Insulations. This stability is critical for Underground Cables, which are exposed to temperature fluctuations caused by seasonal changes and load variations.

Moisture Resistance: The cross-linked molecular structure of XLPE creates a dense, impermeable barrier that repels water and prevents moisture ingress. This eliminates the risk of water-induced short circuits, a common issue in underGround Cables with porous insulations.

Chemical Resistance: XLPE is highly resistant to soil chemicals, including acids, alkalis, and hydrocarbons, ensuring long-term performance in industrial zones or areas with contaminated soil.

Inner Semiconductive Layer: Eliminates air gaps between the conductor and insulation, reducing electrical stress and preventing partial discharges that could degrade the insulation over time.

Outer Semiconductive Layer: Ensures uniform electric field distribution around the insulation, shielding the cable from external electromagnetic interference (EMI) and reducing the risk of voltage surges.

Abrasion Resistance: HDPE’s high tensile strength (up to 30MPa) and impact resistance protect the cable from damage during installation, including scraping against rocks, gravel, or trench walls.

Soil Corrosion Resistance: The sheath is impervious to soil bacteria, fungi, and chemical contaminants, ensuring it remains intact even in aggressive underground environments (e.g., landfills, industrial waste sites).

Water Blocking: HDPE’s low water absorption rate (<0.01%) prevents moisture from reaching the inner layers, safeguarding the insulation and conductors from water-induced degradation.

UV Resistance: While designed for underground use, the HDPE sheath includes UV stabilizers to withstand temporary exposure to sunlight during installation, preventing premature aging.

Low Resistance: The high-conductivity aluminum conductors and low-dielectric-loss XLPE insulation minimize power dissipation, with transmission efficiency exceeding 98% at rated load. This reduces energy waste and lowers operational costs for utilities.

Voltage Stability: The cable maintains stable voltage levels across its length, preventing drops that could damage sensitive equipment in industrial facilities or residential areas.

Short-Circuit Withstand: The conductors and insulation are designed to withstand short-circuit currents up to 25kA for 1 second, allowing protective devices (e.g., circuit breakers) to isolate faults before damage occurs. This enhances safety and reduces downtime during electrical incidents.

Crush Resistance: The HDPE sheath and Stranded Conductors withstand radial pressures up to 3kN/m, ensuring the cable remains intact under heavy soil loads or accidental impact from construction equipment.

Tensile Strength: The cable can withstand pulling forces up to 10kN during installation, allowing it to be pulled through long trenches without stretching or breaking.

Flexibility: Despite its robust construction, the cable retains sufficient flexibility to bend around obstacles (e.g., pipes, rocks) with a minimum bending radius of 12× its outer diameter, simplifying installation in complex underground layouts.

Temperature Extremes: From frozen permafrost (-40°C) to hot desert soil (90°C), the cable maintains performance without degradation, making it suitable for global deployment.

Moisture and Water Immersion: The XLPE insulation and HDPE sheath prevent water ingress even when submerged, ensuring reliability in flood-prone areas or waterlogged soil.

Soil Compatibility: The cable performs consistently in all soil types, including clay (high moisture), sand (abrasive), and rocky terrain (high mechanical stress), eliminating the need for site-specific modifications.

Residential and Commercial Districts: The 3X1X120mm² variant powers underground networks in cities, delivering reliable electricity to homes, offices, and shopping centers. Its direct burial design reduces disruption during urban construction.

Transportation Hubs: Used in subway systems, airports, and railway networks, the cable provides high-voltage power to signaling systems, lighting, and HVAC equipment, ensuring uninterrupted operation.

Manufacturing Facilities: The 3X1X240mm² size connects large industrial complexes, powering heavy machinery, furnaces, and processing plants. Its resistance to chemicals and high currents makes it ideal for harsh industrial environments.

Industrial Parks: Links multiple factories and warehouses to the main grid, supporting synchronized power distribution and reducing the risk of downtime.

Solar Farms: Transmits power from solar panels to the grid, with the 3X1X240mm² variant handling the high currents generated by large-scale installations.

Wind Parks: Connects wind turbines to substations, withstanding the mechanical stress of underground installation in remote, often rocky terrain.

Substation Linkages: The 3X1X240mm² cable connects substations to the main grid, ensuring efficient power distribution across large geographic areas. Its high voltage rating and current capacity make it suitable for bulk power transmission.

IEC 60502-2: Complies with the International Electrotechnical Commission’s standard for high-Voltage Cables (6kV to 30kV), covering Conductor Materials, insulation thickness, and mechanical performance.

IEEE 404: Meets Institute of Electrical and Electronics Engineers standards for underground cables, validating its suitability for direct burial applications.

CE Marking: Certified for use in the European Union, ensuring compliance with health, safety, and environmental protection requirements.

UL 1277: Certified by Underwriters Laboratories for flame resistance and electrical safety, providing assurance for North American markets.

Trench Preparation: Trenches should be dug to a minimum depth of 600mm (urban areas) or 1000mm (rural/industrial zones) to protect against accidental damage. The base should be covered with 100mm of sand or fine gravel to reduce abrasion.

Handling: Cables should be stored on reels in dry, covered areas to prevent moisture ingress. During installation, avoid dragging the cable over sharp objects or bending it beyond the minimum radius.

Jointing and Termination: Use manufacturer-approved joints and terminations designed for 18/30kv applications. These should be installed by certified technicians to ensure water-tight seals and proper electrical contact.

Backfilling: After installation, backfill the trench with soil free of rocks or debris, compacting in layers to prevent settling. A warning tape should be placed 300mm above the cable to alert future excavators.

Visual Inspections: Conduct periodic inspections of above-ground terminations and junction boxes for signs of corrosion, moisture, or damage.

Thermal Scans: Use infrared cameras to detect hotspots in junction boxes, indicating potential loose connections or conductor degradation.

Partial Discharge Testing: Every 5 years, perform partial discharge tests to identify insulation defects before they lead to failures.

Fault Location: In the event of a fault, use time-domain reflectometry (TDR) to pinpoint the location quickly, minimizing excavation and repair time.