ACSR (Aluminum Conductor Steel Reinforced) cable is one of the most widely used conductors in overhead power transmission lines across the globe. Its unique structure—comprising aluminum strands wrapped around a steel core—delivers an ideal balance of conductivity, tensile strength, and durability.

This guide breaks down everything you need to know about ACSR cable, including specifications, benefits, applications, and how to choose the right type. Perfect for engineers, procurement specialists, energy consultants, and infrastructure planners.

📌 Table of Contents

What Is ACSR Cable?

Structure and Components

Key Features and Benefits

Common Applications

ACSR vs Other Conductors

ACSR Cable Types and Sizes (Table)

Installation and Maintenance

FAQs About ACSR Cable

Call to Action

🧪 Structure and Composition of ACSR Cable

An ACSR conductor consists of:

Aluminum Strands (outer layer):

High-conductivity, lightweight, corrosion-resistant

Galvanized Steel Core (inner layer):

Provides high tensile strength and support

⚡ Aluminum carries the electricity, steel handles the mechanical load.

✅ Key Features and Benefits

High Strength-to-Weight Ratio

Enables long-span installations across rivers, valleys, or urban environments.

Excellent Conductivity

The outer aluminum strands ensure minimal energy loss.

Corrosion Resistance

Aluminum naturally forms a protective oxide layer; galvanized steel core enhances longevity.

Cost-Effective

Lower cost than copper conductors, especially for long-distance transmission.

Temperature Performance

Withstands high operating temperatures (up to 90°C or higher with special designs).

🏗️ Common Applications

ACSR cables are used across utility infrastructure and power grids. Popular applications include:

High-voltage power transmission lines

Distribution lines in rural/urban zones

River-crossing lines

Substation connections

Renewable energy grid integrations (wind, solar farms)

🔍 ACSR vs Other Overhead Conductors

Feature ACSR Cable AAC Cable AAAC Cable

Strength High (due to steel core) Low Moderate

Conductivity Good Excellent Good

Corrosion Resistance Moderate High Very High

Weight Light Lighter Light

Cost Moderate Low Moderate

Ideal for Long spans, tough terrain Short spans Coastal, humid areas

🛠️ ACSR is your go-to option for durability and strength over long distances.

📏 ACSR Cable Types and Specifications

Common ACSR Cable Names & Specs

ACSR Type Stranding (Al/Steel) Diameter (mm) Approx. Weight (kg/km) Rated Strength (kN) Current Capacity (A)

Drake 26/7 28.14 1094 62.3 730

Moose 45/7 31.77 1455 89.4 870

Rail 6/1 7.77 161 14.2 210

Linnet 26/7 15.69 372 21.5 430

Hawk 26/7 17.09 444 26.8 480

Specifications may vary depending on manufacturer and standard (ASTM, BS, IEC).

🧰 Installation and Handling Guidelines

To optimize performance and safety:

Proper tensioning is critical – avoid over-pulling

Use anti-corrosion grease where needed

Spacer dampers reduce aeolian vibrations

Training for linemen is crucial to handle ACSR’s composite structure

Ensure correct clamping systems for steel core vs aluminum strands

Pro Tip: Always match the ACSR cable to the mechanical load and environmental conditions of your site.

📘 FAQs About ACSR Cable

🔎 What is the main advantage of ACSR over AAC?

ACSR provides higher tensile strength, making it ideal for longer spans and more robust structural demands. AAC is better for shorter distances where strength is less critical.

🔎 How long can ACSR cables last?

With proper installation and periodic maintenance, ACSR cables can last 30–50 years or more, depending on environmental exposure and loading.

🔎 Are ACSR cables safe in coastal areas?

While ACSR can be used in coastal areas, AAAC or aluminum-clad ACSR (ACSR/AW) are better for high-corrosion environments due to superior resistance.

🔎 Is there a standard for ACSR cable?

Yes. ACSR conductors are manufactured under various standards including:

ASTM B232 (USA)

BS 215-2 (UK)

IEC 61089 (International)

DIN 48204 (Germany)

🔎 What are the thermal limits of ACSR cable?

Typical ACSR cables operate up to 90°C, with some high-temperature variants reaching 150°C or more under emergency load conditions.

🔗 Internal Navigation Tips (Related Topics)

Understanding AAC and AAAC cables for low and medium voltage distribution

How to calculate cable size for transmission – load, voltage drop, and safety

Top 5 conductor types used in overhead power lines

Difference between stranded vs solid conductors

🚀 Ready to Choose the Right ACSR Cable?

When it comes to long-distance, high-reliability power transmission, ACSR cable remains the industry standard. Its composite design ensures mechanical integrity and electrical efficiency—whether you’re powering a remote grid or expanding a national transmission line.

Looking to source or spec your next ACSR conductor? Consider cable type, climate zone, required span, and standards compliance to make the most efficient and durable choice.