266.8 MCM Waxwing ACSR Conductor Cable
The Waxwing ACSR Conductor Cable is engineered for demanding overhead transmission, with 266.8 MCM size and 18/1 stranding configuration. High-purity aluminum (1350-H19) surrounds a galvanized steel core, offering a DC resistance of 0.0643 Ω/MFT and ampacity up to 340A. Adhering to ASTM B230 for aluminum and B232 for assembly, it provides excellent corrosion resistance and mechanical integrity for spans up to 300m. The steel core minimizes sag under heavy loads, while aluminum ensures high conductivity (61.5% IACS) and lightweight design for easier installation. Suitable for distribution voltages up to 138kV, the Waxwing ACSR Conductor Cable reduces line losses and withstands extreme weather, including ice loads up to 1/2 inch. Its economical profile makes it a staple for utility expansions, renewable connections, and grid modernization, delivering consistent power with high weather tolerance and minimal maintenance in global overhead networks.
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
Raw material testing for the Waxwing ACSR Conductor Cable follows ASTM B230 and B498. Aluminum ingots are analyzed for chemical purity (Si<0.1%, Fe<0.2%) and hardness using spectrometers. Steel wires undergo sulfur content (<0.03%), galvanization weight (259g/m² min), and torsion cycles (min 16). Joint compounds are checked for compatibility. The structured process: vendor documentation review, sample extraction, lab testing (hardness Rockwell B80 max), mechanical verification (aluminum tensile 145 MPa), corrosion chamber exposure, and pass/fail determination. This secures high-grade materials for the Waxwing ACSR Conductor Cable's balanced properties and overhead resilience.
Process inspection
Process inspection in Waxwing ACSR Conductor Cable production ensures ASTM B232 adherence. Wire preparation ensures clean surfaces. The stranding machine calibrates for an 18/1 configuration with die compression. Tension control prevents loosening. Lubrication application prevents galling. Reeling checks for even winding. Key steps: input material check, machine calibration (tension 500N), in-line diameter measurement, sample pull testing, flaw detection with ultrasonics, and rework for inconsistencies. This ensures the Waxwing ACSR Conductor Cable's tight stranding, even galvanization, and structural integrity for overhead use.
Finished Product
Finished Waxwing ACSR Conductor Cable testing confirms ASTM B232 compliance. Key tests: rated tensile strength (29.5 kN), conductivity, and weight verification. The process steps: end preparation, machine calibration, incremental tension to rupture, strain gauge recording, post-failure examination, and data logging. Corrosion tests: 500-hour salt spray. Additional: vibration (Aeolian) for endurance. Passing affirms the Waxwing ACSR Conductor Cable's low expansion coefficient, high fatigue life, and suitability for overhead transmission in dynamic conditions. Additional verifications include zinc coating uniformity, lay length (300-400mm), and weather simulation (UV/ice loading).
Application
Waxwing ACSR Conductor Cable is ideal for overhead transmission and distribution lines in utility networks, rural electrification, and industrial power grids. Commonly used for spans up to 300m in moderate wind/ice areas, connecting substations to transformers for efficient 69-138kV service.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Wires and Cables packaging (1)
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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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