ACSR CONDUCTOR
An ACSR (Aluminium Conductor Steel Reinforced) conductor is a high-strength, durable conductor used for overhead power transmission and distribution. It consists of a steel core surrounded by one or more layers of aluminium strands, combining the conductivity of aluminium with the tensile strength of steel. This design provides excellent mechanical strength, making it suitable for long-span installations and areas with high wind or ice loads. ACSR conductors are widely used in power grids due to their cost-effectiveness, lightweight nature, and ability to carry high current loads efficiently.
Description
The conductor consists of Aluminium wires and Zinc coated steel wires, built up in concentric layers. The centre wire or wires are Zinc coated and the outer layer or layers are of Aluminium. In case required, neutral grease shall be applied between the layers of ACSR except the outer layer.
Standard
IS 398 part 2 and 5, BS 215 part 2, EN 50182, ASTM B232, IEC 61089 and other International Specifications. The requirement/specifications given by the purchaser are also taken care of.
Characteristics
Aluminium strand outer layer/layers are formed with centre core of single/stranded galvanized steel wires
ACSR yield less sag at a given tension
High mechanical strength to weight ratio
Can be suitably designed for increased mechanical strength needs by increasing number of steel wires
Can be suitably designed for average mechanical needs by using higher aluminium & lower steel contents
Suited for large spans with metal towers
Advantages
High Tensile Strength – Steel core provides excellent mechanical strength, making it ideal for long-span overhead transmission lines.
High Current Carrying Capacity – Efficiently conducts electricity with minimal power loss.
Longer Spans & Fewer Support Structures – The high strength-to-weight ratio allows longer spans, reducing the need for additional poles or towers.
Lightweight & Cost-Effective – Aluminium strands make it lighter and more economical compared to copper conductors.
Corrosion Resistance – Aluminium outer layers provide natural resistance to environmental factors, and galvanized steel core enhances durability.
Easy to Install & Maintain – Flexible and durable, simplifying handling, installation, and repairs.
Technical information
| Parameter | Specification |
|---|---|
| Conductor Material | Aluminium (outer layers) & Steel (reinforced core) |
| Standard Applicable | IEC 61089, ASTM B232, IS 398 (Part 2), BS EN 50182 |
| Voltage Rating | Medium & High Voltage Transmission Lines |
| Core Configuration | Single or multi-strand steel core with concentric aluminium strands |
| Operating Temperature | Up to 75°C (Normal), 250°C (Short Circuit) |
| Tensile Strength | High mechanical strength due to steel core reinforcement |
| Current Carrying Capacity | Varies based on conductor size and ambient conditions |
| Corrosion Resistance | Aluminium strands provide high resistance; galvanized steel core for extra durability |
| Weight | Lightweight compared to copper conductors |
| Application | Overhead power transmission & distribution lines |
Application
ACSR bare conductors are used for overhead high tension power transmission lines having long spans.
