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
NPC has always chosen raw material suppliers who have a good reputation, possess stable supply capabilities and have passed international quality system certifications (such as ISO 9001). And establish a long-term cooperative relationship with it, forming a stable and reliable raw material supply chain.
We will ensure that all raw materials are subject to strict inspection procedures upon entry to the factory, and can only be stored in the warehouse after they have been confirmed to meet the standards.
Process inspection
NPC has strict quality control procedures for each process in the cable production process.
Process documents: Develop detailed process flow and operation instructions to clarify the operating specifications and quality standards of each process.
Equipment calibration: Regularly calibrate key equipment such as wire drawing machines, stranding machines, extruders, and diameter gauges to ensure that the accuracy meets the requirements.
First piece confirmation: Before each batch of production, the first piece is trial-produced to confirm that the process parameters, product dimensions, electrical performance, etc. meet the standards before mass production can be carried out.
Finished Product
Inspectors conduct ex-factory inspections on cables according to relevant standards and corresponding product inspection specifications to ensure that each ex-factory product complies with the process regulations.
Application
Frequently applied as bare cable in overhead transmission lines, this product additionally acts as primary and secondary bare cable for distribution networks.
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)
Wires and Cables packaging (6)
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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