ABC Twisted Aluminum Cable 2*16 4*16 3*70+54.6 Overhead Aluminum Cable

Safety Enhancement: The insulated, bundled design eliminates the risk of accidental contact with live conductors, significantly reducing electrical hazards compared to bare conductor systems. This is particularly critical in populated areas and accessible locations.

Installation Efficiency: The integrated bundle design simplifies handling and deployment, reducing installation time by up to 40% compared to separate conductors. This translates directly to lower labor costs and minimized disruption during network expansion or maintenance.

Performance Optimization: Each component—from Conductor Material to insulation thickness—is engineered to maximize electrical efficiency while ensuring mechanical robustness. This balance ensures reliable power delivery with minimal losses.

Cost-Effectiveness: By utilizing high-strength Aluminum Conductors and optimized insulation materials, the cable delivers superior performance at a lower cost than copper alternatives, providing exceptional value over its service life.

Early Systems: Traditional Overhead Lines used bare conductors separated by insulators, requiring extensive spacing and frequent maintenance. These systems were prone to weather-related faults and posed significant safety risks.

First-Generation ABCs: Introduced in the 1970s, early bundled cables featured simple polyethylene insulation and basic stranding. While they improved safety, they lacked the mechanical strength and environmental resistance of modern designs.

Modern Innovations: Contemporary ABCs like the Twisted Aluminum Cable series incorporate:

High-purity Aluminum Conductors with optimized stranding for improved conductivity and Flexibility

Advanced polymer insulations (XLPE, HDPE) with enhanced UV and temperature resistance

Precision stranding processes ensuring uniform conductor spacing and consistent electrical performance

Integrated bundling techniques that enhance mechanical stability while maintaining electrical isolation

Material Composition: All conductors utilize 1350-H19 series aluminum, a high-purity alloy (99.5% aluminum) with carefully controlled trace elements:

Silicon (0.10-0.25%): Enhances strength without significantly reducing conductivity

Iron (0.20-0.40%): Improves mechanical properties and processing characteristics

Copper (<0.01%): Minimized to prevent conductivity reduction

Stranding Configurations:

16mm² Conductors: 7 strands of 1.7mm diameter Aluminum Wire, twisted in a concentric lay pattern with a lay length of 16-20 times the conductor diameter (typically 18-22mm). This configuration provides:

Flexibility for easy handling and installation

Tensile strength of 1.2kN

Diameter of 5.1mm

70mm² Conductors: 19 strands of 2.2mm diameter aluminum wire, with a lay length of 14-18 times the conductor diameter (28-35mm). This design offers:

Increased tensile strength of 5.8kN

Improved flexibility despite larger size

Diameter of 11.0mm

54.6mm² Neutral Conductor: 19 strands of 2.0mm diameter aluminum wire, with similar lay characteristics to the 70mm² conductors, providing:

Tensile strength of 4.5kN

Diameter of 10.0mm

Stranding Process: Conductors are stranded using a planetary stranding machine that ensures:

Uniform tension across all strands

Consistent lay length and pitch

Minimal deformation of individual strands

Excellent concentricity (eccentricity <5%)

Surface Treatment: Each strand undergoes a three-step surface preparation process:

Material Options:

Cross-Linked Polyethylene (XLPE):

Composition: Thermoset polymer formed by cross-linking polyethylene molecules using peroxide initiation

Thickness: 1.0mm for 16mm² conductors, 1.2mm for 70mm² and 54.6mm² conductors

Key Properties:

Dielectric strength: 25kV/mm

Operating temperature range: -40°C to +90°C (continuous), +130°C (short-term overload)

Volume resistivity: >10¹⁴Ω·cm

Water absorption: <0.01% by weight

High-Density Polyethylene (HDPE):

Composition: Thermoplastic polymer with a density of 0.941-0.965g/cm³

Thickness: 1.2mm for all conductor sizes (providing equivalent mechanical protection to XLPE at slightly greater thickness)

Key Properties:

Dielectric strength: 20kV/mm

Operating temperature range: -40°C to +75°C (continuous)

Volume resistivity: >10¹⁴Ω·cm

Water absorption: <0.01% by weight

Additives and Enhancements: Both insulation materials incorporate:

UV stabilizers (2.5% by weight) to prevent degradation from sunlight exposure, extending service life in outdoor applications

Antioxidants to resist thermal aging, particularly important for XLPE in high-temperature operation

Slip agents to reduce friction during installation, preventing insulation damage

Insulation Application: The insulation is applied using a precision extrusion process:

Bundling Process:

Insulated conductors are twisted together at precisely controlled lay lengths (150-200mm) on a stranding machine

Twist direction alternates (right and left) every 5-10 meters to enhance overall stability

Conductors are joined by thin (0.3-0.5mm) webs of the same insulation material

Webs are formed during extrusion, ensuring strong bonding with individual conductor insulations

Spacing and Isolation:

Uniform 2-3mm spacing between conductors ensures electrical isolation

This spacing prevents phase-to-phase short circuits even during severe vibration or temperature changes

Web design allows conductor separation during installation for termination and branching

Overall Dimensions by Specification:

2*16: 12.5mm x 8.0mm (width x height), weight 0.32kg/m

4*16: 18.0mm x 12.0mm, weight 0.64kg/m

3*70+54.6: 32.0mm x 22.0mm, weight 1.85kg/m

Mechanical Benefits of Twisting:

Distributes tension evenly across all conductors, increasing overall tensile strength

Reduces wind load and aeolian vibration, common issues with traditional single-conductor systems

Enhances overall cable rigidity, reducing sag during installation

Facilitates routing and handling in confined spaces

Voltage Ratings:

Rated voltage (U0/U): 0.6/1kV (phase-to-ground/phase-to-phase)

Power frequency withstand voltage: 2.5kV for 1 minute (dry)

Impulse withstand voltage: 10kV, 1.2/50μs waveform (10 positive and 10 negative polarity applications)

Partial discharge: <10pC at 1.73 times rated voltage, ensuring insulation quality

Current-Carrying Capacity (Ampacity):

16mm² Conductors:

At 30°C ambient: 85A (free air)

At 40°C ambient: 76A (10% derating)

At 50°C ambient: 65A (23% derating)

70mm² Conductors:

At 30°C ambient: 190A (free air)

At 40°C ambient: 170A (10% derating)

At 50°C ambient: 148A (22% derating)

54.6mm² Neutral Conductor:

At 30°C ambient: 155A (free air)

At 40°C ambient: 139A (10% derating)

At 50°C ambient: 119A (23% derating)

Resistance Characteristics:

16mm² Conductors:

DC resistance at 20°C: 1.15Ω/km

AC resistance at 50Hz: 1.22Ω/km (accounting for skin effect)

70mm² Conductors:

DC resistance at 20°C: 0.34Ω/km

AC resistance at 50Hz: 0.36Ω/km

54.6mm² Neutral Conductor:

DC resistance at 20°C: 0.43Ω/km

AC resistance at 50Hz: 0.45Ω/km

Power Losses:

2*16 specification: Total losses at full load 17.4W/m

4*16 specification: Total losses at full load 34.8W/m

3*70+54.6 specification: Total losses at full load 31.2W/m

Tensile Strength:

2*16 specification: Breaking load 3.5kN

4*16 specification: Breaking load 7.0kN

3*70+54.6 specification: Breaking load 12.0kN

Maximum installation tension: 40% of breaking load (1.4kN, 2.8kN, and 4.8kN respectively)

Bending Performance:

Minimum bending radius during installation:

16mm² Conductor Cables: 10 times cable outer diameter (≈125mm for 216, ≈180mm for 416)

3*70+54.6 specification: 12 times cable outer diameter (≈384mm)

Minimum bending radius during operation: 1.5 times installation radius

Bending test: Withstands 10 bending cycles to installation radius without insulation cracking or conductor damage

Impact and Abrasion Resistance:

Impact resistance: Withstands impact from 2kg weight dropped from 1m height (IEC 60811-503)

Abrasion resistance: Withstands 100 abrasion cycles at 5N load (ASTM D4029) without conductor exposure

Tensile Properties:

Conductor elongation: 2-3%

Insulation elongation: XLPE >200%, HDPE >400%

Coefficient of thermal expansion: Aluminum conductors 23×10⁻⁶/°C, insulation materials 150×10⁻⁶/°C

Temperature Range:

Continuous operation: -40°C to +90°C (XLPE insulation), -40°C to +75°C (HDPE insulation)

Short-term overload: XLPE insulation up to +130°C (maximum 2 hours)

Temperature cycling: Withstands 1000 cycles between -40°C and +90°C (XLPE) without performance degradation

Weather Resistance:

UV resistance: Retains >80% of original tensile strength after 2000 hours of UVB-313 exposure (equivalent to 20 years outdoors)

Ozone resistance: No cracking after 1000 hours exposure to 200ppm ozone (IEC 60811-404)

Water resistance: Insulation resistance remains >1000MΩ·km after 1000 hours immersion in 70°C water

Chemical Resistance:

Withstands 1000 hours exposure to:

5% sulfuric acid and 10% hydrochloric acid

10% sodium hydroxide and 10% ammonia solutions

Petroleum products, lubricating oils, and common agricultural chemicals

Particularly suitable for coastal areas (salt spray resistance) and industrial zones (pollutant resistance)

Service Life Expectancy:

25+ years under normal operating conditions

20+ years in harsh environments (coastal, industrial, extreme temperatures)

Verified through accelerated aging tests: <20% performance degradation after 10,000 hours at 135°C