1272 MCM BITTERN ACSR Conductor Cable
The Bittern ACSR Conductor Cable is engineered for demanding overhead transmission, with 1272 MCM size and 45/7 stranding configuration. High-purity aluminum (1350-H19) surrounds a galvanized steel core, offering a DC resistance of 0.0143 Ω/1000ft and ampacity up to 1,120A at 75°C. 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 enhances tensile strength (35,900 lbs) to control 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 Bittern 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 integrations, and grid modernization, delivering consistent power with high weather tolerance and minimal maintenance in global overhead networks.
Construction
Technical Specifications
Quality Control
Application
Construction
1272 MCM BITTERN ACSR Conductor Cable Construction
Standard
Product ASTM B232
Aluminum's application in electrical conductors has advanced significantly, driven mainly by its favorable electrical properties. For transmission lines with considerable spans, however, aluminum conductors must be provided with extra mechanical support; galvanized steel wires are commonly employed as the core component in ACSR.
Aluminum's application in electrical conductors has advanced significantly, driven mainly by its favorable electrical properties. For transmission lines with considerable spans, however, aluminum conductors must be provided with extra mechanical support; galvanized steel wires are commonly employed as the core component in ACSR.
Construction
ACSR conductors consist of concentrically stranded hard-drawn 1350-H19 aluminum wires layered over a galvanized steel core. The core structure (single or stranded) varies with conductor size, while the steel wire is protected against corrosion via Class A or B galvanization. This design allows ACSR to provide customized electrical and mechanical strength solutions for transmission/distribution lines by balancing aluminum and steel wire proportions.
Applications
Bare cable of this type is widely employed in overhead transmission lines and additionally utilized as primary/secondary cable for distribution systems.
Conditions for Ampacity Calculation
Conductor temperature = 75 °C;
Room temperature = 25 °C
Room temperature = 25 °C
Technical Specifications
1272 MCM BITTERN ACSR Conductor Cable
1272 MCM BITTERN ACSR Conductor Cable
| Construction characteristics | |
| Type of cable | Bittern |
| Type of conductor | Circular, stranded |
| Conductor material | aluminum / Steel Core |
| Conductor flexibility | Class A |
| Conductor shape | Circular non compacted |
| Dimensional characteristics | |
| Conductor cross-section | 1272 kcmil |
| Aluminium cross-section | 644.41 mm² |
| Conductor cross-section | 689.07 mm² |
| Number of aluminium wires | 45 |
| Diameter of aluminium wires | 4.27 mm |
| Number of steel wires | 7 |
| Diameter of steel wires | 2.85 mm |
| Diameter of steel core | 8.54 mm |
| Conductor diameter | 34.17 mm |
| Average geometric radius | 0.01356 m |
| Aluminium content | 1786 kg/km |
| Steel content | 348.8 kg/km |
| Approximate weight | 2135 kg/km |
| Nominal outer diameter | 34.17 mm |
| Number of cores | 1 |
| Number of round wires | - |
| Electrical characteristics | |
| Max. DC resistance of the conductor at 20°C | 0.045 Ohm/km |
| Max. electric resistance AC 60Hz 75°C | 0.056 Ohm/km |
| Inductive reactance | 0.3243 Ohm/km |
| Capacitive reactance | 0.1943 MOhm.km |
| Ampacity | 1160.0 A |
| Mechanical characteristics | |
| Rated breaking load (Class A) | 15458 kgf |
| Rated breaking load (Class B) | 15152 kgf |
| Hardness type | 1350-H19 |
| Usage characteristics | |
| Length | 1570 m |
| Reel net weight | 3345 kg |
| Packaging | Reel 210/100 |
Quality Control
1272 MCM BITTERN ACSR Conductor Cable
Raw Material Test
Raw material testing for the Bittern 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 carbon content (0.5-0.8%), galvanization thickness (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 Bittern ACSR Conductor Cable's balanced properties and overhead resilience.
Process inspection
Process inspection in Bittern ACSR Conductor Cable production ensures ASTM B232 adherence. Wire preparation ensures clean surfaces. The stranding machine calibrates for a 45/7 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 Bittern ACSR Conductor Cable's tight stranding, even galvanization, and structural integrity for overhead use.
Finished Product
Finished Bittern ACSR Conductor Cable testing confirms ASTM B232 compliance. Key tests: rated tensile strength (35,900 lbs), 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 Bittern ACSR Conductor Cable's low expansion coefficient, high fatigue life, and suitability for overhead transmission in dynamic conditions.
Application
Ideal for overhead medium-voltage lines in rural utilities, wind farms, and grid extensions. Used for medium spans in moderate climates, connecting overhead transformers to consumers for efficient, low-cost electricity delivery in suburban and industrial areas.
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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