ACSR Moose Conductors Engineering Standards and Transmission Performance
The ACSR Moose conductor, a steel-reinforced aluminum cable built to the BS 215 standard, is designed for long-span high-voltage transmission and distribution networks. Its 54 aluminum strands and seven galvanized steel strands balance electrical conductivity with the mechanical strength required for overhead lines. With a 500 mm² nominal aluminum area and a total cross-sectional area of 597.20 mm², the conductor is intended for projects in which span length, load and line loss must be evaluated together.
Design and construction
The conductor addresses a basic constraint of long-span overhead transmission: aluminum carries current efficiently, but a pure aluminum conductor may not withstand the tension and environmental loads of wide crossings. In the Moose design, a central galvanized steel core supplies tensile strength while the outer aluminum strands carry current.
Under BS 215, the Moose conductor combines 54 aluminum wires and seven steel wires, each 3.53 mm in diameter. The stranding produces an overall diameter of 31.77 mm and a total area of 597.20 mm², including a nominal aluminum area of 500 mm².
| Parameter | Specification |
|---|---|
| Standard type | ACSR Moose (BS 215) |
| Nominal aluminum area | 500 mm² |
| Stranding | 54 aluminum + 7 steel |
| Single wire diameter | 3.53 mm |
| Overall diameter | 31.77 mm |
| Total cross-sectional area | 597.20 mm² |
| Linear mass | 1,999 kg/km |
| Calculated DC resistance | 0.547 Ω/km |
| Calculated breaking load | 16,110 daN |
| Current rating | 763 A |
Performance and applications
The Moose conductor is specified for wood poles, transmission towers and other support structures. Applications range from extra-high-voltage long-distance trunk lines to distribution circuits and secondary transmission spans in private facilities.
- Mechanical strength: The galvanized steel core raises the calculated breaking load to 16,110 daN, supporting long spans under severe weather conditions.
- Electrical efficiency: Under rated conditions, the conductor carries 763 A, with calculated DC resistance held to 0.547 Ω/km to limit transmission losses.
- Structural stability: The final stranding process yields a 31.77 mm overall diameter and a linear mass of 1,999 kg/km, giving the conductor stable physical fatigue characteristics.
These characteristics make the conductor suitable for projects where mechanical support and current-carrying capacity must be planned together. The steel and aluminum components are designed to act as a composite structure under tension.
Selection and maintenance
Line planners should assess span length, environmental corrosion level and expected load when selecting the Moose conductor. Its physical parameters are established within industry practice, but project conditions determine the final specification.
During installation, crews should follow applicable industry procedures so that the steel core and aluminum layers share tension as intended. Excessive bending or twisting can damage the stranded structure and affect long-term service life and transmission safety.
Frequently Asked Questions
