477 MCM HAWK ACSR Conductor Cable
The 477 MCM HAWK ACSR Conductor Cable is a robust and highly efficient Aluminium Conductor Steel Reinforced (ACSR) cable engineered for overhead transmission and distribution networks. It consists of 26 hard-drawn 1350-H19 aluminium wires concentrically stranded around 7 galvanized steel wires, delivering an optimal blend of electrical conductivity and mechanical strength.
Designed and manufactured in accordance with ASTM B232, the HAWK configuration is well-suited for long-span overhead lines, where elevated tensile performance is required to withstand environmental loads like wind and ice. The galvanized steel core, available in Class A or B, offers superior corrosion resistance, while the aluminium strands ensure high current-carrying capacity with low resistivity.
This conductor is a popular choice in transmission infrastructure due to its balance of strength, weight, and performance, making it a cost-effective and reliable solution in a wide range of operating environments.
Construction
Technical Specifications
Quality Control
Application
Construction
477 MCM HAWK ACSR Conductor Cable Construction
Standard
Product ASTM B232
The application of aluminium in electrical conductors has advanced significantly, primarily owing to its excellent electrical characteristics. Yet, in the case of most transmission lines with extensive spans, aluminium conductors necessitate extra mechanical reinforcement; typically, galvanized steel wires serve as the core for ACSR to fulfill this requirement.
The application of aluminium in electrical conductors has advanced significantly, primarily owing to its excellent electrical characteristics. Yet, in the case of most transmission lines with extensive spans, aluminium conductors necessitate extra mechanical reinforcement; typically, galvanized steel wires serve as the core for ACSR to fulfill this requirement.
Construction
Comprising a concentrically stranded structure, ACSR features one or more layers of hard-drawn 1350-H19 aluminium wires wrapped around a galvanized steel core. The core varies between single-wire and stranded configurations based on size, while the steel components are available with Class A or B galvanization to resist corrosion.
Tailored to the electrical and mechanical strength needs of transmission or distribution lines, ACSR allows for a suitable design through the strategic combination of aluminium and galvanized steel wire quantities.
Tailored to the electrical and mechanical strength needs of transmission or distribution lines, ACSR allows for a suitable design through the strategic combination of aluminium and galvanized steel wire quantities.
Applications
Frequently applied as bare cable in overhead transmission lines, this product additionally acts as primary and secondary bare cable for distribution networks.
Conditions for Ampacity Calculation
Conductor temperature = 75 °C;
Room temperature = 25 °C
Room temperature = 25 °C
Technical Specifications
477 MCM HAWK ACSR Conductor Cable
477 MCM HAWK ACSR Conductor Cable
| Construction characteristics | |
| Type of cable | Hawk |
| Type of conductor | Circular, stranded |
| Conductor material | aluminum / Steel Core |
| Conductor flexibility | Class A |
| Conductor shape | Circular non compacted |
| Dimensional characteristics | |
| Conductor cross-section | 477 kcmil |
| Aluminium cross-section | 241.65 mm² |
| Conductor cross-section | 281.14 mm² |
| Number of aluminium wires | 26 |
| Diameter of aluminium wires | 3.44 mm |
| Number of steel wires | 7 |
| Diameter of steel wires | 2.68 mm |
| Diameter of steel core | 8.04 mm |
| Conductor diameter | 21.8 mm |
| Average geometric radius | 0.00884 m |
| Aluminium content | 671.3 kg/km |
| Steel content | 308.5 kg/km |
| Approximate weight | 979.7 kg/km |
| Nominal outer diameter | 21.8 mm |
| Number of cores | 1 |
| Number of round wires | - |
| Electrical characteristics | |
| Max. DC resistance of the conductor at 20°C | 0.1199 Ohm/km |
| Max. electric resistance AC 60Hz 75°C | 0.144 Ohm/km |
| Inductive reactance | 0.3566 Ohm/km |
| Capacitive reactance | 0.2158 MOhm.km |
| Ampacity | 660.0 A |
| Mechanical characteristics | |
| Rated breaking load (Class A) | 8890 kgf |
| Rated breaking load (Class B) | 8620 kgf |
| Hardness type | 1350-H19 |
| Usage characteristics | |
| Length | 2490 m |
| Reel net weight | 2430 kg |
| Packaging | Reel 170/80 |
Quality Control
477 MCM HAWK ACSR Conductor Cable
Raw Material Test
Raw Material Test is the first quality assurance step for the 477 MCM HAWK ACSR Conductor Cable. Aluminum rods are tested for electrical conductivity, tensile strength, elongation, and chemical composition to ensure efficient current transmission. Galvanized steel wires used for the core are inspected for tensile strength, diameter tolerance, and zinc coating uniformity to confirm corrosion resistance and mechanical reliability. Surface condition and cleanliness of all wires are examined before processing. Only raw materials that meet applicable ASTM, IEC, and internal specifications are approved for conductor manufacturing.
Process inspection
Process Inspection ensures stable manufacturing quality of the 477 MCM HAWK ACSR Conductor Cable throughout production. Aluminum and steel wires are drawn and stranded under controlled conditions to maintain correct lay length and uniform tension. The stranding process is monitored to ensure proper concentricity and balanced mechanical load distribution between aluminum layers and the steel core. In-process dimensional checks and tensile inspections are conducted to detect any deviations early. Continuous monitoring ensures consistent conductor diameter, surface finish, and structural integrity prior to final testing.
Finished Product
Finished Product Test validates the electrical and mechanical performance of the 477 MCM HAWK ACSR Conductor Cable before shipment. Tests include DC resistance measurement, tensile strength testing, and elongation verification. Dimensional inspection confirms compliance with specified conductor size and strand configuration. Visual inspection checks stranding quality, surface condition, and packaging to ensure the conductor meets delivery and installation requirements. Electrical resistance tests verify current-carrying capability. Tensile and elongation tests confirm mechanical strength.
Application
Suitable for overhead transmission lines, utility grids, substations, and power infrastructure projects requiring robust, high-capacity ACSR conductors.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Wires and Cables packaging (1)
Wires and Cables packaging (2)
Wires and Cables packaging (3)
Wires and Cables packaging (4)
Wires and Cables packaging (5)
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Wires and Cables packaging (7)
Wires and Cables packaging (8)
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What are the advantages of power cables and overhead lines?(1) Reliable operation, because it is installed in a hidden place such as underground, it is less damaged by external forces, has less chance of failure, and the power supply is safe, and it will not cause harm to people; (2) The maintenance workload is small and frequent inspections are not required; (3) No need to erect towers; (4) Help improve power factor.
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Which aspects should be considered when choosing the cross section of a power cable?(1) The long-term allowable working current of the cable; (2) Thermal stability once short circuited; (3) The voltage drop on the line cannot exceed the allowable working range.
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What are the measures for cable fire prevention?(1) Use flame-retardant cables; (2) Use fireproof cable tray; (3) Use fireproof paint; (4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.; (5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.
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What should be paid attention to during the transportation and handling of cables?(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat. (2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.
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What inspections should be carried out for the acceptance of cable lines?(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear; (2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements; (3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements; (4) Good grounding; (5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted; (6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.
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