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    70mm² Aerial Bundle Cable (ABC) - Overhead Power Line

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    Overhead insulated line wires
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    2025-09-04 06:07:37
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70mm² Aerial Bundle Cable (ABC) - Overhead Power Line: Comprehensive Details

I. Product-Specific Details

1. Specification Parameters

The 70mm² Aerial Bundle Cable (ABC) is engineered with precise technical specifications to ensure reliable performance in overhead power distribution, combining efficiency, durability, and safety for diverse environmental conditions. These parameters, aligned with international standards, define its electrical capacity, mechanical resilience, and resistance to external stressors.

Conductor Specifications

The cable features multiple Insulated Conductors, with each phase conductor having a cross-sectional area of 70mm². The conductors are made from high-grade aluminum alloys, typically AA 6201 or AA 6101, chosen for their optimal balance of conductivity, strength, and corrosion resistance.
  • Material Properties: Aluminum alloy AA 6201 offers a conductivity of 52% IACS (International Annealed Copper Standard), ensuring efficient power transmission. Its tensile strength is 160–180 N/mm², with an elongation at break of 8–10%, providing Flexibility to withstand wind-induced vibrations and thermal expansion.

  • Stranding Design: Each 70mm² conductor consists of 37 strands of 1.6mm diameter Aluminum Wire, twisted helically to enhance flexibility. This stranded structure reduces fatigue during repeated bending, critical for overhead spans.

  • Current-Carrying Capacity: Rated for 180A at 30°C ambient temperature, with derating factors for higher temperatures: 165A at 40°C, 150A at 50°C, and 135A at 60°C. This ensures safe operation even in hot climates or high-load conditions.

  • Neutral Conductor: Typically includes a neutral conductor sized at 35mm² (if single-phase) or 50mm² (if three-phase), made from the same aluminum alloy, with a current rating of 110A–140A.

Insulation Properties

Each conductor is individually insulated with either cross-linked polyethylene (XLPE) or polyethylene (PE), tailored to environmental demands:
  • XLPE Insulation:

    • Thickness: 1.4mm for 70mm² conductors, ensuring a dielectric strength of 20 kV/mm.

    • Temperature Range: -40°C to +90°C for continuous operation; short-term overload tolerance up to +130°C for 5 seconds.

    • Resistance: Resistant to UV radiation, moisture, and chemicals (e.g., salt spray, industrial pollutants).

  • PE Insulation:

    • Thickness: 1.6mm for enhanced flexibility, with a dielectric strength of 18 kV/mm.

    • Temperature Range: -50°C to +70°C, ideal for cold climates or regions with extreme temperature fluctuations.

    • UV Stability: Contains carbon black additives to resist degradation from sunlight, with a service life of ≥20 years in direct sunlight.

Both insulation types are flame-retardant, meeting IEC 60332-1-2 standards (self-extinguishing within 60 seconds), and are color-coded for phase identification: red, yellow, and blue for phase conductors; white or gray for neutral.

Cable Dimensions and Mechanical Ratings

  • Overall Diameter: 28–32mm (depending on the number of conductors: 2-core, 3-core, or 4-core configurations).

  • Weight: 2.2 kg/m for a 4-core (3×70mm² + 1×50mm²) configuration, reducing load on support poles.

  • Tensile Strength: 4.5 kN (breaking force), allowing spans up to 60m between poles without intermediate supports.

  • Wind Resistance: Aerodynamic bundled design minimizes drag, withstanding wind speeds up to 120 km/h without galloping.

  • Ice Load Capacity: Withstands radial ice accumulation of 15mm, equivalent to 0.5 kN/m radial load, suitable for cold regions.

The cable is rated for 0.6/1kV (low-voltage) or 10kV (medium-voltage) applications, compliant with IEC 60502-2, UL 854, and GB/T 14049 standards.

2. Unique Applications

The 70mm² ABC’s design makes it a versatile solution for overhead power distribution, adapting to urban, suburban, and rural environments while addressing specific challenges like space constraints, weather extremes, and safety requirements.

Urban Power Distribution

In densely populated urban areas, the cable is used for:
  • Secondary Distribution: Connecting medium-voltage (10kV) transformers to residential neighborhoods, delivering 230V/400V power to homes and small businesses.

  • Reduction of Visual Clutter: Replacing traditional bare conductors (which require separate insulators and spacers) with a bundled design, minimizing the number of overhead wires and improving aesthetics.

  • Enhanced Safety: Eliminating exposed live conductors reduces the risk of accidental contact, making it ideal for areas with high pedestrian or vehicle traffic (e.g., city centers, school zones).

Its compact size allows installation in narrow alleys or along buildings with limited clearance, avoiding conflicts with other utilities (e.g., telephone lines, streetlights).

Suburban and Rural Networks

In suburban and rural settings, the cable addresses unique needs:
  • Long Spans: Supports spans up to 60m between poles, reducing the number of support structures needed in sparsely populated areas. This lowers installation costs by 30–40% compared to traditional bare conductors.

  • Harsh Weather Resistance: In coastal regions, its salt spray resistance (tested per ASTM B117 for 1000 hours) prevents corrosion, while in mountainous areas, it withstands heavy snow and ice loads without structural failure.

  • Agricultural Areas: Resistant to chemical exposure from fertilizers and pesticides, making it suitable for farmland power distribution to irrigation pumps and barn equipment.

Industrial and Commercial Zones

The 70mm² ABC serves industrial and commercial applications, including:
  • Industrial Parks: Delivering power to factories and warehouses with medium-to-high loads (e.g., machinery, cooling systems).

  • Commercial Districts: Powering shopping centers, office complexes, and hospitals, where reliable supply is critical. Its Flame-Retardant Insulation reduces fire risks in densely built areas.

  • Renewable Energy Integration: Connecting solar farms or wind turbines to the grid, withstanding outdoor exposure and supporting fluctuating loads.

3. Material and Design Features

The cable’s performance is a result of strategic material selection and engineering, optimizing conductivity, durability, and ease of installation for overhead use.
Aluminum alloy is preferred over pure aluminum or copper for several reasons:
  • Strength-to-Weight Ratio: 30% lighter than copper, reducing stress on poles and brackets. This allows longer spans and lowers transportation costs.

  • Cost-Effectiveness: 50–60% cheaper than copper, making large-scale distribution networks more affordable.

  • Corrosion Resistance: AA 6201 contains magnesium and silicon, forming a protective oxide layer that resists rust and degradation in moist environments.

A thin layer of anti-oxidation compound (e.g., zinc chromate) is applied to conductor strands to prevent oxidation at termination points, ensuring low-resistance connections.

Insulation and Bundling

  • Insulation Function: Beyond electrical isolation, the insulation acts as a physical barrier against moisture, dust, and wildlife (e.g., birds, rodents), reducing outage risks by 60% compared to bare conductors.

  • Bundling Design: Conductors are bound together with a UV-stabilized polyethylene tape, forming a unified cable. This design:

    • Eliminates conductor contact, preventing short circuits.

    • Reduces wind-induced vibration (galloping) by 70% compared to individual conductors.

    • Simplifies handling during installation, as the cable is pulled as a single unit.

Color Coding and Marking

Each conductor is color-coded for easy phase identification, adhering to international standards (e.g., IEC 60446). The outer sheath is marked with:
  • Manufacturer’s name and logo

  • Conductor size and insulation type

  • Voltage rating and standard compliance (e.g., “IEC 60502-2”)

  • Batch number and production date for traceability

4. Manufacturing Process

The production of 70mm² ABC follows strict quality controls to ensure compliance with standards, involving precision steps from conductor stranding to final testing.

Conductor Stranding

Aluminum alloy rods (9.5mm diameter) are drawn through diamond dies to form 1.6mm strands. These strands are twisted in a stranding machine at a lay length of 16–20 times the conductor diameter, ensuring flexibility and uniform stress distribution.

Insulation Extrusion

Each Stranded Conductor is fed into an extrusion line, where molten XLPE or PE is applied:
  • XLPE Process: Insulation is cross-linked via electron beam irradiation (10–15 MeV) to form a thermoset polymer, enhancing thermal and Chemical Resistance.

  • PE Process: Molten PE (160–180°C) is extruded, with carbon black added for UV stability.

Insulation thickness is monitored by online laser gauges, ensuring tolerance within ±0.1mm.

Bundling and Testing

  • Bundling: Insulated conductors are grouped (2–4 Cores) and wrapped with UV-stabilized polyethylene tape, forming the final bundle. A ripcord is embedded between conductors for easy separation during termination.

  • Quality Testing: Each batch undergoes rigorous testing:

    • Conductivity: Four-point probe measurement to verify 52% IACS.

    • Insulation Resistance: Megohmmeter test at 1000V to ensure ≥1000 MΩ/km.

    • Tensile and Flex Tests: 10,000 bending cycles at a radius of 12× cable diameter to check for insulation cracking.

    • Weathering: 2000-hour UV exposure (per ASTM G154) and salt spray testing to validate outdoor durability.

Cables passing all tests are spooled onto large reels for distribution.

II. General Product Information

1. Packaging

The 70mm² ABC is packaged to protect against damage during storage and transportation, while facilitating efficient handling for utility crews and contractors.

Reel Specifications

  • Large Reels: 200m, 500m, or 1000m lengths wound onto steel reels with 1.5m diameter flanges. Each reel weighs 450kg (200m), 1100kg (500m), or 2200kg (1000m).

  • Reel Features: Steel flanges with reinforced edges to prevent bending, a central 120mm diameter axle hole compatible with standard reel stands, and lifting lugs for crane handling.

Protective Packaging

  • Outer Wrapping: Each reel is wrapped in a UV-resistant polyethylene film (0.2mm thick) to shield against dust, moisture, and sunlight during storage.

  • Weather Protection: For outdoor storage, reels are covered with a waterproof tarpaulin, secured with steel bands. A moisture indicator card is placed inside to detect water exposure.

Labeling

Each reel is labeled with:
  • Product details: “70mm² Aerial Bundle Cable (ABC) – 0.6/1kV”

  • Conductor configuration (e.g., “3×70mm² + 1×50mm²”)

  • Insulation type (XLPE or PE)

  • Compliance marks (IEC, UL, GB)

  • Batch number, production date, and manufacturer contact information

2. Transportation

The cable’s transportation is managed to ensure it reaches installation sites in optimal condition, with protocols for different modes of transport.

Road Transport

  • Truck Requirements: Reels are transported on flatbed trucks with reinforced beds. They are secured using ratchet straps (minimum 50kN strength) and wooden chocks to prevent rolling.

  • Load Distribution: Maximum 2 reels per truck for 1000m lengths, ensuring axle loads comply with road regulations (≤12 tons per axle).

  • Climate Control: No temperature-controlled trailers required, but reels are covered with tarps to avoid prolonged rain exposure.

Rail and Sea Transport

  • Rail Transport: Reels are loaded into boxcars, secured vertically with steel brackets. Spacers (100mm thick) are placed between reels to prevent friction damage.

  • Sea Freight: Shipped in 40ft high-cube containers, with up to 8 reels (1000m each) per container. Reels are secured to the container floor using twist locks, and desiccants (1kg per 5m³) are added to absorb moisture.

Handling Guidelines

  • Loading/Unloading: Use cranes or forklifts with reel-handling attachments (avoiding flange damage). Lifting capacity must exceed reel weight by 20% (e.g., 540kg for a 450kg reel).

  • Storage: Store reels in covered areas, elevated on wooden pallets (150mm high) to prevent ground moisture contact. Avoid stacking reels to prevent flange deformation.

  • Unspooling: Use a reel stand to rotate the reel horizontally during installation, ensuring the cable is pulled without twisting.

3. Shipping and Delivery

The company offers flexible shipping options to meet utility and contractor deadlines, with streamlined processes for large-scale orders.

Order Processing

  • In-Stock Cables: Dispatched within 48 hours of order confirmation, with a confirmation email including reel count, tracking number, and delivery estimate.

  • Custom Orders: (e.g., specific insulation type, conductor configuration) require 10–14 business days, with weekly progress updates.

Delivery Timeframes

  • Domestic: 3–7 business days for truck transport (within 500km); 7–14 days for remote areas (e.g., mountainous regions).

  • International: 14–21 days by sea (major ports); 3–5 days by air freight (for urgent replacements).

Shipping Costs

  • Domestic: \(300–\)1200 per reel, depending on distance and reel length (e.g., \(300 for 200m, \)1200 for 1000m).

  • International: \(1800–\)4000 per container (sea); \(8–\)12 per kg (air freight).

Bulk orders (≥10 reels) qualify for 15% shipping discounts, with priority scheduling for utility emergency orders (e.g., post-storm repairs).

4. Sample Provision

Utilities and contractors can request samples to evaluate performance before placing bulk orders.

Sample Details

  • 5m length of 70mm² ABC (3×70mm² + 1×50mm² configuration).

  • Technical datasheet with conductor and insulation test results.

  • Compliance certificates (IEC 60502-2, UL 854).

  • Installation guidelines, including termination techniques.

Request Process

Samples are available upon request via the company website or sales team, with a $200 fee (refundable on orders ≥5 reels). Shipped via DHL or FedEx, with delivery within 3–5 business days (domestic) or 7–10 days (international).

5. After-Sales Service

Comprehensive after-sales support ensures optimal performance, from installation to long-term maintenance.

Technical Assistance

  • On-Site Training: Certified engineers provide installation workshops, covering:

    • Proper tensioning (30–40% of breaking strength) to avoid sagging or overstretching.

    • Termination using compression lugs (e.g., AlCu connectors) and waterproof sealing.

  • Remote Support: 24/7 phone and email access to technical experts for troubleshooting (e.g., insulation damage, conductor overheating).

Warranty Coverage

  • 25-year warranty against manufacturing defects, including:

    • Insulation failure (e.g., cracking, delamination).

    • Conductor stranding issues (e.g., loose strands, uneven lay).

    • UV degradation of bundling tape.

The warranty excludes damage from improper installation (e.g., exceeding bending radius), extreme weather beyond rated limits (e.g., 150km/h winds), or vandalism.

Claims Process

  • To file a claim, customers provide:

    • Proof of purchase and photos/videos of the defect.

    • Installation details (e.g., span length, tension applied).

  • Claims are reviewed within 48 hours; approved claims receive replacement reels or prorated refunds. Urgent replacements (e.g., for outage repairs) are shipped within 24 hours at no cost.

Maintenance Guidelines

  • Annual Inspections: Check for insulation cracks, bird damage, or excessive sagging (maximum 2% of span length).

  • Termination Checks: Re-tighten compression lugs every 5 years to prevent corrosion-induced resistance.

  • Cleaning: In polluted areas, wash insulation with mild detergent to remove contaminants (e.g., industrial dust) that could reduce dielectric strength.

    Learn more about cable products
    Contact Hongtai Cable Technology Co.,Ltd
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    Hongtai Cable Technology Co.,Ltd

    E-mail:export@qlcables.com

                sales@qlcables.com

    Tel/whatsapp:+86-18032066271

    ADD:Xiaokou Industrial Development Zone, Ningjin County, Xingtai City,Hebei Province, China

    Copyright © Hongtai Cable Technology Co.,Ltd  Technical Support: Ronglida Technology

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