266.8 MCM Waxwing ACSR Conductor Cable
The ACSR CAA 266.8 MCM 18/1 FWAXWING conductor is a high-strength, high-performance overhead transmission cable constructed with a galvanized steel core surrounded by concentrically stranded layers of hard-drawn 1350-H19 aluminium wires. This specific ACSR configuration offers an optimal balance between mechanical strength and electrical conductivity, making it ideal for overhead power transmission and distribution line applications.
Manufactured in compliance with ASTM B232 standards, this conductor provides long-lasting durability and enhanced corrosion resistance, thanks to its Class A or B galvanized steel core. The aluminium layers ensure excellent current-carrying capacity, while the steel core delivers the mechanical reinforcement required to withstand environmental stresses such as wind and ice loading.
Construction
Technical Specifications
Quality Control
Application
Construction
266.8 MCM Waxwing ACSR Conductor Cable Construction
Standard
Product ASTM B232
Aluminum’s outstanding electrical properties make it an ideal choice for conductors. However, in most transmission and distribution lines, aluminum conductors need extra mechanical support, which is typically provided by galvanized steel wires used in ACSR cores.
Aluminum’s outstanding electrical properties make it an ideal choice for conductors. However, in most transmission and distribution lines, aluminum conductors need extra mechanical support, which is typically provided by galvanized steel wires used in ACSR cores.
Construction
ACSR is a concentrically stranded conductor where hard-drawn 1350-H19 aluminum wires are layered around a galvanized steel core. The core may be single or stranded, determined by its dimensions, and the steel wire is galvanized (Class A or B) to resist corrosion. To satisfy the electrical and mechanical strength specifications of transmission and distribution lines, ACSR provides suitable designs by adjusting the quantities of aluminum and galvanized steel wires.
Applications
Extensively used as bare cable in overhead transmission lines, and serves dual roles as primary and secondary bare cable for distribution lines.
Conditions for Ampacity Calculation
Conductor temperature = 75 °C;
Room temperature = 25 °C
Room temperature = 25 °C
Technical Specifications
266.8 MCM Waxwing ACSR Conductor Cable
266.8 MCM Waxwing ACSR Conductor Cable
| Construction characteristics | |
| Type of cable | Waxwing |
| Type of conductor | Circular, stranded |
| Conductor material | aluminum AA / Steel Core |
| Conductor flexibility | Class AA |
| Conductor shape | Circular non compacted |
| Dimensional characteristics | |
| Conductor cross-section | 266.8 kcmil |
| Aluminium cross-section | 134.98 mm² |
| Conductor cross-section | 142.48 mm² |
| Number of aluminium wires | 18 |
| Diameter of aluminium wires | 3.09 mm |
| Number of steel wires | 1 |
| Diameter of steel wires | 3.09 mm |
| Diameter of steel core | 3.09 mm |
| Conductor diameter | 15.45 mm |
| Average geometric radius | 0.006 m |
| Aluminium content | 372.2 kg/km |
| Steel content | 58.4 kg/km |
| Approximate weight | 430.6 kg/km |
| Nominal outer diameter | 15.45 mm |
| Number of cores | 1 |
| Number of round wires | 19 |
| Electrical characteristics | |
| Max. DC resistance of the conductor at 20°C | 0.2136 Ohm/km |
| Max. electric resistance AC 60Hz 75°C | 0.303 Ohm/km |
| Inductive reactance | 0.3858 Ohm/km |
| Capacitive reactance | 0.2321 MOhm.km |
| Ampacity | 450.0 A |
| Mechanical characteristics | |
| Rated breaking load (Class A) | 3184 kgf |
| Rated breaking load (Class B) | 3132 kgf |
| Hardness type | 1350-H19 |
| Usage characteristics | |
| Length | 1860 m |
| Reel net weight | 800 kg |
| Packaging | Reel 125/70 |
Quality Control
266.8 MCM Waxwing 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
Extensively used as bare cable in overhead transmission lines, and serves dual roles as primary and secondary bare cable for 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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