336.4 MCM LINNET ACSR Conductor Cable
The ACSR CAA 336.4 MCM 26/7F LINNET conductor is engineered for superior performance in overhead transmission and distribution systems. Constructed with 26 strands of hard-drawn 1350-H19 aluminium helically stranded around 7 galvanized steel wires, this conductor delivers the perfect balance of high electrical conductivity and enhanced tensile strength.
Compliant with ASTM B232 standards, this ACSR conductor is ideal for long-span installations and demanding environmental conditions. The steel-reinforced core, galvanized to Class A or B standards, provides critical mechanical support, while the aluminium strands ensure efficient power transmission.
This construction makes the LINNET configuration especially well-suited for medium- to high-voltage lines, where both strength and conductivity are crucial. Its corrosion-resistant steel core enhances durability and reduces maintenance needs, ensuring a long service life in overhead applications.
Construction
Technical Specifications
Quality Control
Application
Construction
336.4 MCM LINNET ACSR Conductor Cable Construction
Standard
Product ASTM B232
Aluminum is favored for electrical conductors because of its superior electrical properties. Yet, in most transmission and distribution lines, aluminum conductors need added mechanical support, commonly provided by galvanized steel wires in ACSR cores.
Aluminum is favored for electrical conductors because of its superior electrical properties. Yet, in most transmission and distribution lines, aluminum conductors need added mechanical support, commonly provided by galvanized steel wires in ACSR cores.
Construction
ACSR conductors are concentrically stranded, with hard-drawn 1350-H19 aluminum wires forming one or more layers around a galvanized steel core. The core’s form (single wire or stranded) depends on size, and the steel wire uses Class A or B galvanization for corrosion protection. By addressing the electrical and mechanical strength needs of transmission/distribution lines, ACSR enables appropriate designs by varying the amounts of aluminum and galvanized steel wires.
Applications
Routinely utilized as bare cable in overhead transmission lines, and also operates 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
336.4 MCM LINNET ACSR Conductor Cable
336.4 MCM LINNET ACSR Conductor Cable
| Construction characteristics | |
| Type of cable | Linnet |
| Type of conductor | Circular, stranded |
| Conductor material | aluminum / Steel Core |
| Conductor flexibility | Class A |
| Conductor shape | Circular non compacted |
| Dimensional characteristics | |
| Conductor cross-section | 336.4 kcmil |
| Aluminium cross-section | 170.55 mm² |
| Conductor cross-section | 198.38 mm² |
| Number of aluminium wires | 26 |
| Diameter of aluminium wires | 2.89 mm |
| Number of steel wires | 7 |
| Diameter of steel wires | 2.25 mm |
| Diameter of steel core | 6.75 mm |
| Conductor diameter | 18.31 mm |
| Average geometric radius | 0.00742 m |
| Aluminium content | 473.8 kg/km |
| Steel content | 217.4 kg/km |
| Approximate weight | 691.2 kg/km |
| Nominal outer diameter | 18.31 mm |
| Number of cores | 1 |
| Number of round wires | - |
| Electrical characteristics | |
| Max. DC resistance of the conductor at 20°C | 0.1699 Ohm/km |
| Max. electric resistance AC 60Hz 75°C | 0.203 Ohm/km |
| Inductive reactance | 0.3698 hm/km |
| Capacitive reactance | 0.2241 MOhm.km |
| Ampacity | 530.0 A |
| Mechanical characteristics | |
| Rated breaking load (Class A) | 6416 kgf |
| Rated breaking load (Class B) | 6226 kgf |
| Hardness type | 1350-H19 |
| Usage characteristics | |
| Length | 1960 m |
| Reel net weight | 1350 kg |
| Packaging | Reel 125/100 |
Quality Control
336.4 MCM LINNET ACSR Conductor Cable
Raw Material Test
Raw material testing for the Linnet ACSR Conductor Cable ensures compliance with ASTM B230 and B232 standards. Aluminum wires (1350-H19) are inspected for purity (>99.5%), conductivity (>61.5% IACS), and elongation (>1.5%) using spectrometry and tensile machines. Steel core wires (Class A galvanized) undergo zinc coating mass (min 259g/m²), tensile strength (1300-1450 MPa), and ductility checks via wrap and torsion tests. Samples are subjected to corrosion simulation in salt spray chambers and impurity analysis via microscopy. The structured process: incoming batch verification, random sampling, physical/mechanical testing (diameter, weight per length), chemical composition confirmation, accelerated aging trials at 150°C, and material release decision.
Process inspection
During manufacturing of the Linnet ACSR Conductor Cable, process inspection adheres to ASTM B232. Aluminum drawing ensures wire diameter tolerance (±0.025mm) and surface smoothness with micrometers. Steel core galvanizing controls zinc thickness (80-100µm) and adhesion via stripping tests. Stranding line monitors 26/7 lay ratio, compactness, and tension balance using optical sensors. Real-time checks for ovality and strand continuity occur at multiple points. Final lubrication and spooling verify coil integrity. Key steps: pre-stranding material dryness confirmation, parameter logging (speed, tension), intermediate sampling for microscopy, defect rejection (breaks/cracks), and post-stranding dimensional verification. This multi-point oversight ensures the Linnet ACSR Conductor Cable achieves uniform stranding, optimal steel-aluminum bonding, and corrosion protection.
Finished Product
The finished Linnet ACSR Conductor Cable undergoes comprehensive testing to ASTM B232 standards. Routine tests include overall diameter (0.721 inches), weight per length (0.4626 lbs/ft), and DC resistance (0.0507 Ω/1000ft at 20°C). Mechanical tests cover ultimate tensile strength (14,100 lbs) and elongation using universal machines. Electrical withstand and partial discharge checks confirm integrity. The process steps: reel sampling, preparation with grips, gradual load application to break point, timed hold for creep, post-test fracture analysis, and documentation. Additional verifications include zinc coating uniformity, lay length (300-400mm), and weather simulation (UV/ice loading). Only cables passing all criteria are approved, confirming the Linnet ACSR Conductor Cable's high strength-to-weight ratio, low sag, and corrosion resistance.
Application
Linnet 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
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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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