AL-59 Conductors (AL-59)
High-performance aluminium alloy overhead conductor designed for medium, high, and extra-high voltage power transmission and distribution systems.
What are AL-59 Conductors?
AL-59 conductors are homogeneous aluminium alloy conductors manufactured from Aluminium-Magnesium-Silicon (Al-Mg-Si) alloy, offering an excellent combination of high electrical conductivity, superior mechanical strength, low sag, and enhanced corrosion resistance for modern overhead transmission applications.
AL-59 conductors are manufactured using specially engineered aluminium alloy wires with conductivity of approximately 59% IACS (International Annealed Copper Standard), enabling higher current carrying capacity and lower transmission losses compared to conventional conductors. Manufactured in accordance with IS 398 (Part 6) and other applicable international standards, these conductors are widely used in overhead transmission and distribution networks where improved efficiency, long-span capability, and higher power evacuation are required.
At Mahavir Transmission Limited, AL-59 conductors are manufactured under stringent quality control systems using advanced alloy rod processing, precision wire drawing, and high-accuracy stranding technologies. This ensures consistent conductor quality, precise dimensional characteristics, and dependable long-term operational performance under demanding environmental and electrical conditions.
With their superior strength-to-weight ratio, lower DC resistance, and excellent corrosion resistance, AL-59 conductors are ideally suited for modern transmission infrastructure, network upgradation projects, coastal regions, industrial environments, and high-capacity power corridors.
High-Conductivity Aluminium Alloy
Manufactured from advanced Aluminium-Magnesium-Silicon alloy, providing superior electrical conductivity with lower transmission losses.
Concentric-Lay Stranded
Multiple alloy strands laid concentrically for improved mechanical flexibility, uniform current distribution, and reliable long-term performance.
Long Span Capability
Suitable for long spans, river crossings, highways, valleys, and challenging transmission terrain applications.
Improved System Reliability
Ensures dependable long-term operation under high wind pressure, temperature variations, and severe environmental conditions.
Key Technical Features
Superior electrical and mechanical characteristics make AL-59 conductors an ideal solution for modern high-efficiency power transmission networks requiring higher ampacity, reduced losses, and dependable long-term performance.
High Electrical Conductivity
Provides lower DC resistance and reduced transmission losses, resulting in improved electrical efficiency and enhanced overall system performance.
Higher Current Carrying Capacity
Capable of carrying significantly higher current than other conventional conductors of comparable size while maintaining reliable performance.
Excellent Strength-to-Weight Ratio
Offers high mechanical strength with lower conductor weight, enabling longer transmission spans and more optimized tower structures.
Low Sag Characteristics
Ensures improved line clearance and enhanced operational safety under elevated temperatures and heavy electrical loading conditions.
Superior Corrosion Resistance
Performs reliably in coastal, humid, industrial, and chemically aggressive environments with superior resistance to atmospheric corrosion.
Enhanced Thermal Stability
Maintains stable mechanical and electrical performance under elevated operating temperatures and demanding transmission load conditions.
Reduced Transmission Losses
Lower electrical resistance helps reduce I²R losses, improving energy efficiency and overall transmission system performance.
Cost-Effective Network Upgradation
Allows utilities to increase power transfer capacity while optimizing infrastructure investment and minimizing overall project costs.
Applications of AL-59 Conductors
AL-59 conductors from Mahavir Transmission are extensively used across a broad range of overhead transmission and distribution applications where high conductivity, superior mechanical strength, and enhanced corrosion resistance are essential.
Overhead Transmission Lines
Widely used in medium, high, and extra-high voltage transmission networks for efficient, reliable, and long-distance electrical power transfer.
Network Upgradation Projects
Ideal for reconductoring and grid modernization projects to enhance transmission capacity without requiring significant structural modifications or infrastructure replacement.
Coastal and Industrial Areas
Excellent corrosion resistance makes these conductors ideal for coastal areas, industrial zones, chemical plants, and heavily polluted environments.
Long Span Installations
Suitable for river crossings, valleys, highways, and transmission routes requiring long unsupported spans with reliable mechanical performance.
Renewable Energy Evacuation Networks
Used in transmission infrastructure for efficient evacuation of power generated from solar, wind, and other renewable energy sources.
Urban and High Load Corridors
Supports high-capacity power transmission in industrial zones, metropolitan regions, and rapidly expanding areas with increasing electricity demand.
Product Specifications
Technical specifications of AL-59 conductor variants include size, stranding, diameter, weight, resistance, strength, current capacity, and standards.
| # | Code | Total Area (mm²) | Nom. Area (mm²) | Al Strands | Steel Strands | Al Wire ⌀ (mm) | Steel Wire ⌀ (mm) | Overall ⌀ (mm) | Al Wt (kg/km) | Steel Wt (kg/km) | Total Wt (kg/km) | Strength (kN) | DC Res. (Ω/km) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 15 sq.mm | 15 | 15 | 3 | - | 2.5 | - | 5.39 | 40.15 | 0 | 40.15 | 3.5 | 1.992 |
| 2 | 22 sq.mm | 22 | 22 | 7 | - | 2 | - | 6 | 60.15 | 0 | 60.15 | 5.2 | 1.3379 |
| 3 | 34 sq.mm | 34 | 34 | 7 | - | 2.5 | - | 7.5 | 93.98 | 0 | 93.98 | 8.2 | 0.8563 |
| 4 | 80 sq.mm | 80 | 80 | 7 | - | 3.81 | - | 11.43 | 218.88 | 0 | 218.88 | 18.2 | 0.3687 |
| 5 | 100 sq.mm | 100 | 100 | 7 | - | 4.26 | - | 12.78 | 272.88 | 0 | 272.88 | 21.8 | 0.2949 |
| 6 | 125 sq.mm | 125 | 125 | 19 | - | 2.89 | - | 14.45 | 342.55 | 0 | 342.55 | 29.6 | 0.2372 |
| 7 | 173 sq.mm | 173 | 173 | 19 | - | 3.4 | - | 17 | 474.09 | 0 | 474.09 | 41 | 0.1714 |
| 8 | 200 sq.mm | 200 | 200 | 19 | - | 3.66 | - | 18.3 | 549.39 | 0 | 549.39 | 45.6 | 0.1479 |
| 9 | 276 sq.mm | 276 | 276 | 37 | - | 3.08 | - | 21.56 | 759.2 | 0 | 759.2 | 65.47 | 0.1075 |
| 10 | 454 sq.mm | 454 | 454 | 61 | - | 3.08 | - | 27.72 | 1254.34 | 0 | 1254.34 | 108 | 0.0653 |
| 11 | 484 sq.mm | 484 | 484 | 61 | - | 3.18 | - | 28.62 | 1337 | 0 | 1337 | 115 | 0.0613 |
| 12 | 525 sq.mm | 525 | 525 | 61 | - | 3.31 | - | 29.79 | 1448.61 | 0 | 1448.61 | 124.7 | 0.0566 |
| 13 | 554 sq.mm | 554 | 554 | 61 | - | 3.4 | - | 30.6 | 1528.44 | 0 | 1528.44 | 131.53 | 0.0536 |
| 14 | 594 sq.mm | 594 | 594 | 61 | - | 3.52 | - | 31.7 | 1638.23 | 0 | 1638.23 | 135.4 | 0.0501 |
| 15 | 642 sq.mm | 642 | 642 | 61 | - | 3.66 | - | 32.94 | 1771.16 | 0 | 1771.16 | 146.4 | 0.0463 |
| 16 | 695 sq.mm | 695 | 695 | 61 | - | 3.81 | - | 34.29 | 1919.3 | 0 | 1919.3 | 158.6 | 0.0427 |
| 17 | 774 sq.mm | 774 | 774 | 61 | - | 4.02 | - | 36.18 | 2136.69 | 0 | 2136.69 | 169.17 | 0.0384 |
Standards and Compliance
Our AL-59 conductors are manufactured and tested in strict conformance with Indian and International Standards, ensuring quality you can depend upon.
IS 398: Part 6
Indian Standard Specification for Aluminium Alloy Conductors used in overhead transmission and distribution applications.
IS 9997 : 1991
Specification for Aluminium Alloy Wire Rods used as input material for conductor manufacturing.
IEC 61089
International Electrotechnical Commission standard for round wire concentric-lay overhead electrical stranded conductors
ASTM B 399/B3992M
American Standard Specification for Concentric-Lay stranded aluminum-alloy 6201-T81 Conductors. Export-ready compliance for international project requirements
EN 50182
European Standard Specification for electrical and mechanical characteristics of bare, round-wire concentric lay overhead conductors
SS 424 0813 / SS 424 0814
Swedish Standards specifying requirements for aluminium alloy wires and conductors with high conductivity and mechanical performance.
Quality & Certifications
BIS Certified
Bureau of Indian Standards
ISO 9001 : 2015
Quality Management
In-House Testing
NABL-Grade Equipment
GeM Registered
Govt. eMarketplace
Routine & Type Test Performed
Explore Our Full Conductor Range
Alongside AL-59, Mahavir Transmission offers the complete family of overhead conductors and cables for every transmission and distribution application.