556.5 MCM DOVE ACSR Conductor Cable
The ACSR CAA 556.5 MCM 26/7F DOVE is a high-capacity, steel-reinforced aluminium conductor designed for the efficient and reliable delivery of electrical power across overhead transmission and distribution lines. Its structure features 26 hard-drawn 1350-H19 aluminium strands wrapped around 7 galvanized steel strands, forming a strong, concentric-lay stranded design.
Manufactured in accordance with ASTM B232, this conductor brings together the lightweight, conductive benefits of aluminium with the mechanical strength and durability of galvanized steel. The steel core, treated with Class A or B galvanization, offers essential corrosion protection, especially in harsh weather environments or long-span installations.
The DOVE configuration is a popular industry standard for medium- to high-voltage overhead systems, offering excellent performance where long spans and high tension loads are involved. Its optimized aluminium-to-steel ratio makes it well-suited for utility transmission networks, helping reduce line losses while ensuring structural integrity.
Construction
Technical Specifications
Quality Control
Application
Construction
556.5 MCM DOVE ACSR Conductor Cable Construction
Standard
Product ASTM B232
The development of aluminium as a material for electrical conductors has progressed remarkably, largely due to its optimal electrical properties. Nevertheless, in most transmission lines with considerable spans, aluminium conductors need additional mechanical bracing—galvanized steel wires are commonly utilized as the core in ACSR to provide such support.
The development of aluminium as a material for electrical conductors has progressed remarkably, largely due to its optimal electrical properties. Nevertheless, in most transmission lines with considerable spans, aluminium conductors need additional mechanical bracing—galvanized steel wires are commonly utilized as the core in ACSR to provide such support.
Construction
Featuring a concentrically stranded design, ACSR includes one or more layers of hard-drawn 1350-H19 aluminium wires stranded around a galvanized steel core. The core can be a single wire or stranded, depending on size, and the steel wires are supplied with Class A or B galvanization as corrosion protection.
ACSR delivers a customized design that aligns with the electrical and mechanical strength requirements of transmission or distribution lines, achieved by combining aluminium and galvanized steel wires in suitable quantities.
ACSR delivers a customized design that aligns with the electrical and mechanical strength requirements of transmission or distribution lines, achieved by combining aluminium and galvanized steel wires in suitable quantities.
Applications
This cable is commonly employed as bare conductors for overhead transmission lines, while also serving as primary and secondary bare cables in distribution lines.
Conditions for Ampacity Calculation
Conductor temperature = 75 °C;
Room temperature = 25 °C
Room temperature = 25 °C
Technical Specifications
556.5 MCM DOVE ACSR Conductor Cable
556.5 MCM DOVE ACSR Conductor Cable
| Construction characteristics | |
| Type of cable | Dove |
| Type of conductor | Circular, stranded |
| Conductor material | aluminum / Steel Core |
| Conductor flexibility | Class AA |
| Conductor shape | Circular non compacted |
| Dimensional characteristics | |
| Conductor cross-section | 556.5 kcmil |
| Aluminium cross-section | 282.59 mm² |
| Conductor cross-section | 328.51 mm² |
| Number of aluminium wires | 26 |
| Diameter of aluminium wires | 3.72 mm |
| Number of steel wires | 7 |
| Diameter of steel wires | 2.89 mm |
| Diameter of steel core | 8.67 mm |
| Conductor diameter | 23.55 mm |
| Average geometric radius | 0.0955 m |
| Aluminium content | 785.1 kg/km |
| Steel content | 358.7 kg/km |
| Approximate weight | 1144 kg/km |
| Nominal outer diameter | 23.55 mm |
| Number of cores | 1 |
| Number of round wires | - |
| Electrical characteristics | |
| Max. DC resistance of the conductor at 20°C | 0.1025 Ohm/km |
| Max. electric resistance AC 60Hz 75°C | 0.123 Ohm/km |
| Inductive reactance | 0.3508 Ohm/km |
| Capacitive reactance | 0.2121 MOhm.km |
| Ampacity | 730.0 A |
| Mechanical characteristics | |
| Rated breaking load (Class A) | 10278 kgf |
| Rated breaking load (Class B) | 9969 kgf |
| Hardness type | 1350-H19 |
| Usage characteristics | |
| Length | 2100 m |
| Reel net weight | 2400 kg |
| Packaging | Reel 170/80 |
Quality Control
556.5 MCM DOVE 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
This cable is commonly employed as bare conductors for overhead transmission lines, while also serving as primary and secondary bare cables in distribution lines.
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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