Voltage Rating: 1kV. This rating denotes the cable’s maximum safe operating voltage, with a phase-to-earth voltage of 0.6kV and phase-to-phase voltage of 1kV—aligning with low-to-medium voltage (LMV) distribution networks that supply electricity to end-users (residential, commercial, small industrial). It complies with international standards for LMV Overhead Cables, ensuring seamless integration with existing grid infrastructure.
Core Configuration: 4-core (3x95mm² + 1x54mm²). The asymmetric core design is a hallmark of this cable, tailored to the specific needs of three-phase power distribution:
Phase Conductors (3x95mm²): Three identical conductors, typically color-coded (red, yellow, blue) for easy phase identification, transmit balanced three-phase power. This configuration is standard for overhead networks, as three-phase power minimizes energy loss and supports higher load capacities compared to single-phase systems.
Neutral/Earth Conductor (1x54mm²): A single smaller conductor serves dual purposes: as a neutral to balance unbalanced phase currents (common in residential areas with mixed single-phase loads) and as an earth to channel fault currents (e.g., ground faults) to the grid, triggering protective devices (circuit breakers) and preventing electrical hazards. The 54mm² size is optimized for this role—sufficiently large to handle fault currents without overheating, yet smaller than the phase conductors to reduce material costs.
Current-Carrying Capacity (Ampacity): The 95mm² phase conductors have an ampacity of 180-220A (varies by ambient temperature and span length). At 25°C ambient temperature and a 60-meter span, the ampacity peaks at 220A—enough to power 50-100 average households (each with a typical load of 2-4kW) or a small commercial complex (e.g., a retail center with 10-15 stores). The 54mm² neutral conductor has an ampacity of 120-150A, ensuring it can handle unbalanced currents (up to 50% of phase current, per utility standards) and fault currents (up to 10kA for short durations).
Short-Circuit Current Rating: The cable can withstand short-circuit currents of up to 30kA for 1 second—critical for overhead networks, where short circuits (e.g., from tree contact or lightning) can occur unexpectedly. This rating ensures the cable does not melt or suffer permanent damage during transient fault events, maintaining network reliability.
Overall Diameter: The Bundled Cable has an overall diameter of 35-40mm, depending on insulation thickness. This compact size reduces wind resistance (a key concern for overhead cables, as high winds can cause swaying and mechanical stress) and minimizes clutter on utility poles, allowing for easier installation alongside other infrastructure (e.g., fiber-optic cables).
Weight: The cable weighs 1.2-1.5 kg/m, significantly lighter than copper-core overhead cables (which typically weigh 2.5-3 kg/m for similar ampacity). This lightweight design reduces the load on utility poles and supporting hardware (e.g., brackets, insulators), extending the lifespan of the pole infrastructure and enabling longer spans (up to 100 meters between poles, compared to 60-80 meters for Copper Cables).
Tensile Strength: The aluminum alloy conductors provide a tensile strength of 120-150 MPa, sufficient to support the cable’s weight over long spans without stretching or breaking. The bundled design further enhances mechanical stability, as the conductors are bonded together (via insulation) to distribute stress evenly across the bundle.
Bending Radius: The cable has a minimum bending radius of 15x its overall diameter (e.g., 525mm for a 35mm diameter cable). This Flexibility allows for easy installation around utility poles and over obstacles (e.g., roads, rivers) without damaging the insulation or conductors.
Conductivity: Aluminum alloy has a conductivity of 61% IACS (International Annealed Copper Standard)—only slightly lower than pure aluminum (62% IACS) and significantly higher than other alloys. This ensures minimal energy loss (typically <2% per 100 meters) during power transmission, a critical metric for utility companies seeking to reduce operational costs.
Mechanical Strength: Unlike pure aluminum (which has a tensile strength of 80-100 MPa), aluminum alloy (AA 6201) incorporates magnesium (0.5-1.0%) and silicon (0.6-1.2%) to enhance tensile strength (120-150 MPa) and fatigue resistance. This strength is essential for overhead cables, which must support their own weight over long spans and withstand wind-induced vibration (a common cause of conductor fatigue in pure Aluminum Cables).
Corrosion Resistance: Aluminum alloy forms a natural oxide layer (Al₂O₃) on its surface, which acts as a barrier against moisture, salt, and industrial pollutants. This makes the cable suitable for coastal areas (where saltwater spray can corrode metals) and industrial zones (with high levels of air pollution). For added protection, some variants include a thin layer of zinc coating (galvanization) on the conductors, further enhancing corrosion resistance.
Weight Efficiency: Aluminum alloy is 3x lighter than copper (density of 2.7 g/cm³ vs. 8.96 g/cm³ for copper) for the same conductivity. This reduces the load on utility poles and supporting hardware, lowering installation costs (fewer poles and brackets are needed for long spans) and making the cable easier to handle during installation (reducing labor time and risk of injury).
UV Resistance: XLPE is formulated with UV stabilizers (e.g., carbon black, hindered amine light stabilizers) that prevent degradation from direct sunlight. Unlike PVC (which becomes brittle and cracks after 5-10 years of UV exposure), XLPE maintains its structural integrity for 20-30 years, extending the cable’s service life and reducing maintenance costs.
Temperature Resistance: XLPE has a continuous operating temperature range of -40°C to +90°C, with short-term overload capability up to +130°C. This makes the cable suitable for extreme climates—from the freezing winters of northern Canada (where temperatures drop to -40°C) to the hot summers of the Middle East (where temperatures exceed +50°C). PVC, by contrast, softens at +70°C and becomes brittle at -10°C, limiting its use in harsh climates.
Moisture Resistance: XLPE is inherently water-resistant, with a low water absorption rate (<0.1% by weight after 24 hours of immersion). This prevents moisture ingress into the conductor, which can cause electrical breakdown and corrosion. The insulation is also extruded in a single, seamless layer, eliminating joints or gaps where moisture could accumulate.
Fire Safety: XLPE is a low-smoke zero-halogen (LSZH) material when formulated to meet IEC 61034 standards. In the event of a fire, it emits minimal smoke and no toxic halogens (chlorine, bromine), reducing health risks for emergency responders and minimizing damage to nearby equipment. This is critical for overhead cables passing over residential areas or commercial buildings.
PP Tape: A thin (0.1-0.2mm) PP tape is helically wrapped around the four insulated conductors, bonding them together with heat during the manufacturing process. PP tape is lightweight, cost-effective, and provides sufficient cohesion to keep the bundle intact during installation and operation. It is commonly used in dry or moderately humid climates.
PE Outer Sheath: For cables installed in wet or coastal climates, a thick (1.5-2mm) PE outer sheath is extruded over the bundled conductors. PE offers superior moisture resistance and mechanical protection compared to PP tape, preventing water ingress and protecting the insulation from damage during handling (e.g., scratches from utility tools). The sheath is also colored (typically black) to enhance UV resistance.
Long Spans: The lightweight aluminum alloy conductors and high tensile strength enable spans of up to 100 meters between poles, reducing the number of poles needed to cover large rural areas. This lowers installation costs (fewer poles, less labor) and minimizes environmental impact (fewer poles mean less land disturbance).
Low Maintenance: The UV-resistant XLPE insulation and corrosion-resistant aluminum alloy conductors require minimal maintenance—typically only annual visual inspections. This is critical for rural areas, where utility crews may have to travel long distances to Service Cables.
Wildlife Protection: The bundled design eliminates bare conductors, reducing the risk of wildlife electrocution (e.g., birds perching on bare wires) and damage from animals (e.g., squirrels chewing on insulation). This reduces power outages caused by wildlife interference, a common issue in rural networks.
Space Efficiency: The bundled design of the ABC cable reduces clutter on utility poles, allowing for the installation of other infrastructure (e.g., fiber-optic cables for broadband, street lighting) on the same pole. This is critical in urban areas, where space on poles is limited.
Fast Installation: The single-bundle design allows installers to pull one cable instead of four separate conductors, reducing installation time by 30-50% compared to traditional overhead cables. This minimizes disruption to traffic and residents during network upgrades or new installations.
Reliability in Urban Environments: The XLPE insulation resists damage from air pollution (e.g., smog, industrial emissions) and the PE outer sheath (in some variants) protects against scratches from construction equipment. This ensures reliable power supply in busy urban areas, where outages can have significant economic impacts.
Load Capacity: The 95mm² phase conductors can support the high loads of small industrial machinery (e.g., compressors, lathes) and commercial HVAC systems, ensuring uninterrupted operation.
Chemical Resistance: The XLPE insulation and PE outer sheath resist damage from industrial chemicals (e.g., oils, solvents) and cleaning agents, making the cable suitable for installation near factories or commercial kitchens.
Fire Safety: The LSZH properties of XLPE reduce fire risks in commercial buildings, where occupied spaces are adjacent to overhead cables. This compliance with fire safety standards (e.g., IEC 60332) is a key requirement for commercial installations.
Alloy Melting and Casting: High-purity aluminum (99.7% pure) is melted in a furnace and mixed with magnesium and silicon to form AA 6201 or AA 6101 alloy. The molten alloy is cast into cylindrical billets (150-200mm in diameter) using a continuous casting machine. The billets are cooled slowly to prevent internal defects (e.g., air bubbles) that could weaken the conductor.
Wire Drawing: The billets are heated to 500-550°C (hot extrusion) and pushed through a series of dies to reduce their diameter to the required size for the conductor strands. For the 95mm² conductor, the strands are typically 2.5-3mm in diameter, while the 54mm² conductor uses 1.8-2.2mm strands. The drawing process is done in multiple passes, with intermediate annealing (heating to 300-350°C) to soften the alloy and improve ductility.
Stranding: The drawn strands are twisted together (stranded) using a stranding machine. The stranding pattern is concentric (layers of strands twisted around a central strand) to ensure uniform current distribution and mechanical strength. For the 95mm² conductor, 19 strands are used (1 central strand + 6 strands in the first layer + 12 strands in the second layer), while the 54mm² conductor uses 13 strands. The Stranded Conductors are annealed again to reduce residual stress and improve conductivity.
XLPE Compounding: XLPE resin is mixed with additives (UV stabilizers, antioxidants, carbon black for UV resistance, and LSZH compounds) in a twin-screw extruder. The mixture is melted at 160-180°C to form a homogeneous melt, which is then extruded onto the stranded aluminum alloy conductors using a crosshead extruder.
Cross-Linking: The extruded XLPE insulation is cross-linked to form a three-dimensional molecular structure, which enhances its thermal and mechanical properties. Two methods are commonly used:
Peroxide Cross-Linking: The insulation is passed through a continuous vulcanization (CV) tube heated to 180-200°C. The heat activates peroxides in the XLPE, causing cross-links between polymer chains. This method is used for cables requiring high thermal resistance (e.g., those installed in hot climates).
Silane Cross-Linking: The XLPE resin is pre-mixed with silane additives before extrusion. After extrusion, the insulation is exposed to moisture (via a water bath or humid chamber) for 24-48 hours. The moisture reacts with the silane to form cross-links. This method is more energy-efficient and suitable for cables installed in moderate climates.
Cooling and Sizing: After cross-linking, the insulated conductors are cooled in a water bath to set the insulation and maintain dimensional stability. A sizing die ensures the insulation thickness is uniform (typically 2.5-3mm for the phase conductors and 2-2.5mm for the neutral conductor). The insulated conductors are then printed with color codes (for phase identification) using a laser printer.
Core Bundling: The four insulated conductors (three phase, one neutral) are fed into a cabling machine, where they are twisted together in a helical pattern to form a compact bundle. The twisting pitch (distance between consecutive twists) is 150-200mm, optimized to balance flexibility and bundle cohesion. A PP tape is helically wrapped around the bundle to hold the conductors together, with heat applied to bond the tape to the insulation.
Outer Sheath Extrusion (Optional): For cables requiring additional protection (e.g., those installed in coastal or industrial areas), a PE outer sheath is extruded over the bundled conductors. The PE resin is melted at 160-170°C and extruded using a crosshead extruder, forming a seamless sheath 1.5-2mm thick. The sheath is cooled in a water bath and printed with product information (cable type, CSA, voltage rating, manufacturer name, and standard compliance) using an inkjet printer.
Electrical Performance Testing:
Insulation Resistance Test: Each insulated conductor is tested with a 2.5kV DC megohmmeter for 1 minute. A minimum insulation resistance of 100 MΩ is required to confirm no moisture ingress or insulation defects.
Dielectric Strength Test: The cable is submerged in water (to simulate wet conditions) and subjected to a 1.73kV AC voltage for 5 minutes. No breakdown or arcing indicates the insulation can withstand the 1kV rated voltage safely.
Ampacity Verification: Sample cables are loaded with current up to 250% of their rated ampacity (e.g., 550A for 95mm² conductors) in a temperature-controlled chamber. The conductor temperature is monitored to ensure it does not exceed 90°C, confirming compliance with ampacity ratings.
Mechanical Performance Testing:
Tensile Strength Test: A 1-meter sample of the cable is pulled using a tensile testing machine until it breaks. The breaking force must exceed 1.5x the cable’s weight per meter (e.g., >2250 N for a 1.5 kg/m cable) to ensure it can support its own weight over long spans.
Bending Test: The cable is bent around a mandrel (15x its overall diameter) 10 times in each direction. After bending, the insulation is inspected for cracks, and electrical continuity is tested to confirm no conductor damage.
Impact Test: A 1kg weight is dropped from a height of 1 meter onto the cable (simulating damage from falling debris). The cable is then tested for electrical continuity and insulation integrity to ensure no faults.
Environmental Resistance Testing:
UV Aging Test: Samples are exposed to a UV lamp (simulating 5 years of outdoor sunlight) for 1000 hours. After exposure, the insulation is tested for tensile strength and elongation—loss of strength must be <20%, and elongation must remain >100% to confirm UV resistance.
Salt Spray Test: For coastal applications, samples are exposed to a 5% saltwater spray (35°C) for 500 hours. The aluminum alloy conductors are inspected for corrosion, and insulation resistance is tested to ensure no degradation.
Temperature Cycling Test: Samples are cycled between -40°C (12 hours) and +90°C (12 hours) for 50 cycles. After cycling, the cable is tested for electrical performance and mechanical flexibility to confirm suitability for extreme climates.
Certification: After passing all tests, the cable is certified to meet international standards, including IEC 61089 (Aerial bundle cables for Low Voltage), ANSI C135.1 (Standard for Aerial Cable), and BS 7870 (Low Voltage aerial cables). Certification documents are provided to customers, including test reports and compliance certificates, to verify the cable’s quality and eligibility for use in global markets.
Reel Construction:
Wooden reels are made from FSC-certified pine or birch, with a diameter of 1.2-1.5 meters (depending on cable length) and a flange thickness of 15-20mm. The reel core (where the cable is wound) has a diameter of 300-400mm to prevent the cable from being bent beyond its minimum bending radius during unwinding.
Steel reels are used for large-volume orders (1000+ meters) or international shipping, as they offer greater durability. Steel reels are galvanized to resist corrosion, with a steel frame that can withstand forklift handling and ocean transit.
Cable Protection:
The wound cable is wrapped in a 200-micron polyethylene (PE) film to protect against dust and moisture. For shipments to humid or coastal regions, an additional layer of waterproof PVC shrink wrap is applied, heated to form a tight seal that repels rain and saltwater spray.
A corrugated cardboard sleeve is placed over the reel flanges to prevent damage to the cable edges during handling (e.g., scratches from forklift tines).
Labeling: Each reel is labeled with two weather-resistant tags (one on each flange) containing:
Product details: Cable type (1kV ABC), core configuration (3x95mm² + 1x54mm²), length (e.g., 300m), voltage rating, and material specifications (aluminum alloy conductors, XLPE insulation).
Logistics information: Order number, customer name, destination address, reel weight (cable + reel: typically 360-600 kg for 300m of 1.5 kg/m cable), and dimensions (reel diameter, width).
Handling instructions: Symbols for “forklift use only,” “keep dry,” and “do not stack” (to prevent reel collapse and cable damage).
Cardboard Boxes: Double-walled corrugated boxes (300-lb test strength) are used, with foam inserts at the ends to prevent the cable from shifting during transit. The box is sealed with water-activated tape (more durable than standard packing tape) and labeled with product and shipping details.
PE Bags: For very small orders (1-5 meters) or temporary storage, the cable is sealed in 150-micron thick PE bags with zip closures. The bags are printed with product information and “store in a dry place” instructions to prevent moisture damage.
Wooden reels are sourced from FSC-certified forests, ensuring responsible forestry practices. After delivery, reels can be reused by customers (for on-site cable storage) or returned to the manufacturer for recycling.
PE film and cardboard boxes are fully recyclable, and the company offers a take-back program for used packaging (available to customers who place repeat orders).
PVC shrink wrap is being phased out in favor of bio-based shrink films (made from corn starch), which are compostable and break down within 6 months in soil.
Truck Transportation:
Reels are loaded onto flatbed trucks using forklifts or cranes, with wooden blocks placed between reels to prevent rolling. The truck bed is covered with a tarpaulin to protect the cable from rain or dust during transit.
For small-batch orders in boxes, standard delivery vans are used, with packages stacked to maximize space while avoiding crushing (boxes are marked with “this side up” to ensure proper handling).
Delivery times: 1-3 business days for regional shipments (within 500 km) and 3-7 business days for cross-country shipments (e.g., from California to New York in the U.S. or London to Edinburgh in the UK).
Rail Freight:
For large-volume orders (5+ reels) or long-distance domestic shipments (1000+ km), rail freight is used. Railcars are equipped with secure tie-down points for reels, and transit times are 5-10 business days—slower than trucking but 30-40% more cost-effective for heavy loads.
Sea Freight:
The majority of international orders are shipped via sea freight, as it is cost-effective for heavy reels. Reels are loaded into 20ft or 40ft shipping containers (FCL, Full Container Load) or consolidated with other products (LCL, Less than Container Load) for smaller orders.
Inside the container, reels are secured with dunnage (wooden beams, airbags) to prevent movement during rough seas. Humidity packs are placed in the container to absorb moisture (critical for shipments to tropical regions).
Transit times: 2-4 weeks for regional shipments (e.g., Europe to North Africa), 4-8 weeks for intercontinental shipments (e.g., China to Brazil), and 6-12 weeks for transoceanic shipments (e.g., U.S. to Australia).
Air Freight:
For urgent orders (e.g., emergency repairs, project deadlines), air freight is used. However, air freight is limited to small-batch orders (e.g., 1-2 reels of 50 meters) due to weight restrictions (aircraft cargo holds typically handle loads up to 1000 kg per shipment).
Reels are packed in lightweight aluminum frames to reduce weight, and transit times are 1-3 business days. Costs are 5-10 times higher than sea freight, so air freight is only recommended for time-sensitive projects.
Customs Compliance:
All international shipments include a complete set of documentation to avoid customs delays:
Commercial Invoice: Details product description, quantity, unit price, total value, and country of origin.
Packing List: Specifies package dimensions, weight, and contents (e.g., “3 reels of 1kV ABC cable, 300m each”).
Certificate of Origin: Confirms the cable was manufactured in the stated country (required for preferential tariff rates under trade agreements like NAFTA or EU-Mercosur).
Compliance Certificates: Includes IEC/ANSI/BS certifications to verify the cable meets the importing country’s standards (e.g., UL certification for shipments to the U.S., CE marking for shipments to the EU).
Order Placement: Customers can place orders via email, phone, or the company’s online portal. Orders include specifications (cable length, quantity, optional PE sheath), delivery address, and desired delivery date.
Production Lead Time: Standard orders (200-500 meters per reel) have a lead time of 7-10 business days. Custom orders (e.g., special lengths, additional corrosion protection) may take 14-21 business days, depending on complexity.
Order Confirmation: Within 24 hours of order placement, customers receive a confirmation email with an order number, production timeline, and estimated shipping date.
Shipping Notification: When the order is shipped, customers receive a notification with a tracking number (for truck/rail/air shipments) or container number (for sea freight). The notification includes a link to track the shipment in real time.
Delivery Inspection: Upon delivery, customers are advised to inspect the packaging for damage (e.g., broken reels, torn shrink wrap) and confirm the cable length and specifications match the order. Any discrepancies must be reported within 48 hours of delivery to initiate a claim.
Sample Availability: Samples are available in lengths of 1-5 meters, with options for both PP tape and PE sheath variants. Customers can request samples via the online portal or email, providing their shipping address and application details (e.g., “rural overhead distribution in coastal Florida”).
Sample Cost: Samples are free for customers placing bulk orders (1000+ meters), with shipping costs covered by the company. For smaller customers or first-time inquiries, samples cost $50-100 (refundable if a bulk order is placed within 30 days).
Sample Testing Support: Along with the sample, customers receive a test guide with instructions for verifying key properties (e.g., insulation resistance, flexibility). The company’s technical team is available via phone or email to answer questions about sample testing or interpretation of results.
Technical Support: A team of electrical engineers is available 24/7 to provide installation guidance (e.g., span calculations, insulator selection) and answer technical questions (e.g., “What is the maximum ampacity for a 95mm² conductor in 40°C ambient temperature?”). Support is offered via phone, email, or video call, with response times of <2 hours for urgent inquiries.
Installation Training: For large utility customers, the company provides on-site installation training. Training sessions cover cable handling (e.g., unwinding reels safely), tensioning (to avoid overstretching), and termination (connecting to utility poles or transformers). Training is led by certified instructors with 5+ years of overhead cable installation experience.
Warranty Coverage: The 1kV ABC cable comes with a 15-year warranty against manufacturing defects (e.g., insulation failure, conductor corrosion). The warranty covers repair or replacement of defective cables, as well as labor costs for reinstallation (if the defect is confirmed within the first 5 years). To claim the warranty, customers provide a copy of the order invoice, photos of the defect, and a test report confirming the issue.
Maintenance Guidelines: Customers receive a maintenance manual with recommendations for long-term cable care, including:
Annual visual inspections (checking for insulation cracks, conductor damage, or wildlife interference).
Cleaning the cable surface (using a soft brush and mild detergent) every 3-5 years to remove dirt and pollutants (critical for industrial areas).
Tension checks every 5 years (to ensure the cable has not stretched over time, which could reduce span capacity).
Replacement and Recycling: For end-of-life cables (after 20-30 years of service), the company offers a recycling program. Customers can return old cables, and the company recycles the aluminum alloy conductors (95% recyclable) and XLPE insulation (converted into plastic pellets for reuse in non-electrical applications). Recycling is free for customers who purchase replacement cables from the company.
Hongtai Cable Technology Co., Ltd
E-mail: export@qlcables.com
sales@qlcables.com
Tel/whatsapp:+86-18032066271
Tambahkan ： Zona Pengembangan Industri Xiaokou, Kabupaten Ningjin, Kota Xingtai ， Provinsi Hebei, Cina
Hak Cipta © Hongtai Cable Technology Co., Ltd Dukungan Teknis:Teknologi Ronglida
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