Urban Power Grids: The 6/10kv and 12/20kv variants are widely used in city distribution networks. Their single-core design allows efficient routing through underground ducts and concrete trenches, while the "F" (water/corrosion resistance) designation makes them suitable for damp urban environments, such as near rivers or in flood-prone areas. The 240mm² cable is often deployed in residential neighborhoods, while the 300mm² option powers commercial districts with high-density loads.
Industrial Zones: Factories, refineries, and chemical plants rely on the 12/20kv cables for internal power distribution. The "F" variant’s corrosion resistance protects against chemical spills and industrial fumes, while the 300mm² conductor handles heavy machinery loads (e.g., motors, furnaces). In petrochemical facilities, the cables’ fire-retardant properties (enhanced in "FL" models) reduce fire propagation risks.
Renewable Energy Projects: Solar farms and wind parks utilize the 18/30kv Cables to transmit power from generators to grid connection points. The 300mm² conductor minimizes power loss over long distances (up to 10km), while the "FL" variant’s fire resistance is critical for installations in forested or high-risk areas. The cables’ UV-resistant sheaths and temperature tolerance (-40°C to 90°C) ensure reliability in outdoor, exposed environments.
Transportation Infrastructure: Subways, airports, and railway networks depend on the "FL" models for their fire safety. In tunnels, the 12/20kv cables power lighting, signaling, and ventilation systems, with the fire-resistant insulation maintaining circuit integrity for up to 120 minutes during a fire—compliant with EN 50200 standards. The single-core design simplifies installation in narrow tunnel ducts.
High-Rise Buildings: The 6/10kv and 12/20kv cables are used in vertical risers of skyscrapers, where the "F" variant’s water resistance prevents moisture ingress in elevator shafts or utility risers. The 240mm² conductor efficiently distributes power to floors, while the compact single-core design reduces space requirements in crowded building shafts.
Conductors: Constructed from high-purity electrolytic copper (99.95% purity) or aluminum alloy, the conductors prioritize conductivity and corrosion resistance. Copper offers lower resistance (58 MS/m) and is preferred for high-efficiency applications, while aluminum (37 MS/m) provides a cost-effective, lightweight alternative for long-distance installations. Both materials are stranded with a class 2 or 5 stranding pattern to balance flexibility and strength.
Insulation: XLPE is the primary Insulation Material, chosen for its exceptional thermal stability and Chemical Resistance. XLPE is cross-linked via either chemical (peroxide) or radiation curing, forming a three-dimensional molecular structure that withstands 90°C continuous operation. For "FL" models, the insulation is infused with flame-retardant additives (e.g., magnesium hydroxide) to suppress combustion and reduce smoke emission.
Screening: A semi-conductive screen layer is applied over the insulation to control electric field distribution, preventing partial discharges. This layer is typically a carbon-loaded XLPE or EPR tape, ensuring uniform contact with the insulation and minimizing voids that could degrade performance.
Sheath: The outer sheath varies by model: "F" variants use a halogen-free low-smoke (HFLS) polyolefin sheath with anti-UV and anti-rodent additives, suitable for outdoor or damp environments. "FL" models feature a fire-resistant sheath (e.g., modified PVC or ethylene vinyl acetate) that chars to form an insulating barrier during combustion, meeting IEC 60332-3-24 fire resistance standards.
Armoring (Optional): For heavy-duty applications, Steel Tape or wire armor may be added beneath the sheath. Galvanized steel tape armor (STA) resists crushing in underground installations, while steel wire armor (SWA) provides tensile strength for overhead or vertical installations. Armor thickness ranges from 0.8mm to 1.2mm, depending on the cable size.
Conductor Stranding: Individual wires are drawn to specification, then twisted in a stranding machine. Copper Wires undergo annealing to reduce hardness, while Aluminum Wires are treated with anti-oxidation coatings.
Insulation Extrusion: The conductor is fed into an extrusion line where molten XLPE is applied. The insulation thickness is precisely controlled via laser gauges to ensure the 25mm specification. "FL" models receive an additional flame-retardant layer during extrusion.
Cross-Linking: Insulated Cores are cured in a continuous vulcanization (CV) tube (chemical cross-linking) or exposed to electron beams (radiation cross-linking) to activate the XLPE’s molecular bonding. This step ensures thermal stability and dielectric strength.
Screening and Sheathing: The semi-conductive screen is wrapped or extruded over the insulation, followed by the outer sheath. "F" sheaths are extruded with moisture-blocking compounds, while "FL" sheaths undergo flame resistance testing during production.
Testing: Each cable undergoes AC voltage withstand tests (e.g., 20kv for 5 minutes for 6/10kv models), partial discharge measurement (<10 pC at 1.73U0), and insulation resistance testing (>1000 MΩ·km). "FL" variants are additionally tested for fire resistance per EN 50200, with samples subjected to 950°C flames for 120 minutes while maintaining circuit integrity.
Reels: For lengths ≥500m, cables are wound onto wooden or steel reels. Wooden reels (FSC-certified) are used for domestic shipments, featuring 1.5–2.5m diameter flanges to prevent slippage. Steel reels, with galvanized frames, are reserved for international transport or reusable applications, offering enhanced durability against rough handling.
Coils: Short lengths (50–200m) are coiled and wrapped in UV-resistant polyethylene film, secured with polypropylene straps. Each coil includes a moisture-absorbing desiccant packet to prevent condensation during storage.
Labeling: Every reel/coil is labeled with the model, specification (conductor size, voltage), length, batch number, and compliance marks (CE, UL, ISO 9001). "FL" models feature additional fire resistance certifications (e.g., CPR Class B2ca).
Palletization: Bulk orders are palletized with non-slip pads, shrink-wrapped, and labeled with gross weight (typically 800–1200kg per pallet) for easy logistics planning.
Loading: Reels are loaded horizontally and secured with steel chains to prevent rotation during transit. Coils are stacked vertically with wooden separators to avoid crushing.
Temperature Control: Cables are transported in covered vehicles to avoid UV exposure. In temperatures <0°C, reels are pre-warmed to 10–15°C to prevent sheath brittleness; in >40°C, ventilation systems maintain <35°C to avoid insulation softening.
Handling Equipment: Forklifts with reel clamps or cranes with spreader bars are mandatory for reel movement. Manual handling is restricted to coils <50kg, with gloves required to prevent sheath damage.
Documentation: Shipping documents include a packing list, certificate of conformity, and material safety data sheet (MSDS). International shipments add customs declarations and voltage compatibility certificates.
Domestic Delivery: Road transport via curtain-side trucks (2–5 business days) for bulk orders; express courier (1–2 days) for urgent small quantities.
International Shipping: Sea freight (3–6 weeks) for full container loads, with FOB or CIF terms available. Air freight (3–5 days) is offered for urgent orders, with door-to-door service via DHL or FedEx.
Tracking: Customers receive real-time tracking via a web portal, with notifications for departure, port arrival, and final delivery.
Sample Details: 1–5m lengths of 1X240RM/25 (6/10kv) or 1X300RM/25 (18/30kv) cables, with "F" or "FL" variants upon request.
Cost and Lead Time: Free for qualified customers (utility companies, EPC contractors), with shipping charged at cost. Samples ship within 3–5 business days.
Testing Data: Samples include a test report with conductor resistance, insulation thickness, and dielectric strength results. Third-party lab testing (e.g., SGS) is available for an additional fee.
Warranty: 15-year warranty covering material defects and workmanship. Valid for installations by certified electricians following EN 50268 guidelines.
Technical Support: 24/7 engineer hotline for installation guidance, fault diagnosis, and system design advice. On-site support is available for large projects, with response times <48 hours in Europe and <72 hours globally.
Repairs and Replacements: Defective cables are replaced free under warranty, with expedited shipping for critical applications. Out-of-warranty repairs (e.g., sheath patching) are offered at competitive rates.
Training: Online and on-site training for installers, covering termination techniques, bending radius compliance, and fire safety protocols for "FL" models.
Recall Management: In the unlikely event of a defect, the manufacturer implements a proactive recall system, with full replacement and installation support at no cost to the customer.
Hongtai Cable Technology Co., Ltd
E-mail: export@qlcables.com
sales@qlcables.com
Tel/Whatsapp:+86-18032066271
Adicionar: Zona de Desenvolvimento Industrial Xiaokou, Ningjin County, Cidade de Xingtai , Hebei Província, China
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