Aluminum Conductors Steel Supported – Trapezoidal

Why Choose Us?

High-capacity, low-sag overhead conductors featuring trapezoidal aluminium strands compacted over a galvanized steel core, combining exceptional ampacity, mechanical strength, and thermal performance for today’s demanding transmission needs.

Trapezoidal Strand Design

 Compact aluminium layers maximize packing density and reduce conductor diameter.

Steel-Supported Core

Galvanized steel core delivers high tensile strength with minimal weight penalty.

Elevated-Temperature Rating

 Continuous operation up to 200 °C boosts ampacity by up to 50 % over conventional ACSR.

Low Sag Performance

 High modulus steel and controlled aluminium alloy minimize elongation under load.

Corrosion Resistance

All-aluminium exterior resists moisture, pollutants, and UV exposure.

Extended Service Life

 All-aluminium sheath resists UV and industrial atmospheres, minimizing maintenance needs .

Applications

  • Long-span transmission crossings (valleys, rivers)
  • High-temperature operation on existing lines to increase capacity
  • Renewable energy evacuation (solar and wind farms)
  • Urban network reinforcement where right-of-way is limited
  • Retrofit projects upgrading aging infrastructure without tower replacement

Applicable Standards

  • IS 398 Part 2 – Aluminium alloy conductors for overhead lines
  • IEC 61089 – Round-wire concentric-lay overhead electrical conductors
  • ASTM B399 – Specification for aluminium-alloy conductors, concentric-lay strand
  • IEEE 738 – Calculation of temperature-rise in bare overhead conductors

Technical Specifications

Code Word Size (kcmil) Diameter (in) Total Weight (lb/1,000 ft) Std Strength (lbs) DC Resistance @20 °C (Ω/1,000 ft) AC Resistance @75 °C (Ω/1,000 ft)
Flicker 477.0 0.4233 612.8 13,000 0.0354 0.0434
Hawk 477.0 0.4356 655.0 15,600 0.0352 0.0433
Parakeet 556.5 0.4937 714.9 15,200 0.0302 0.0372
Dove 556.5 0.5083 764.5 18,200 0.0301 0.0371

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