Aluminum Conductor Steel Reinforced (ACSR) conductors are designed for use in overhead power transmission and distribution lines, offering a combination of high conductivity and superior mechanical strength. In China, these conductors are manufactured in accordance with GB/T 1179, the national standard that specifies the technical and dimensional requirements for ACSR conductors.
Originally issued in 1983 and most recently updated in 2017, GB/T 1179 ensures that ACSR conductors meet modern demands for reliability, capacity, and cost-efficiency.
Key Features
High Tensile Strength: Steel core allows for long span installations and improved sag performance
Good Conductivity: Outer aluminum layers ensure efficient current-carrying capacity
Lightweight and Cost-Effective: Aluminum significantly reduces weight and overall system cost
Versatile Terrain Suitability: Performs well in mountainous, rural, coastal, and urban environments
Ease of Installation and Maintenance: Simplified handling and stringing process
Construction
ACSR conductors are composed of:
A central steel core (single or stranded galvanized steel wires) that provides mechanical strength
One or more concentric layers of hard-drawn aluminum wires (designated as type “L”) that deliver excellent electrical conductivity
This composite construction offers a balanced solution for spanning long distances and supporting high transmission voltages.
acsr conductor construction
Applications
Overhead high-voltage and extra high-voltage transmission lines
Medium-voltage distribution lines
Rural electrification and grid expansion projects
Lines crossing rivers, valleys, and rugged terrain
Technical Specifications – GB/T 1179
The GB/T 1179 standard defines:
Structure & Dimensions: Conductor type, strand configuration, and diameter tolerances
Electrical Properties: DC resistance at 20°C, current-carrying capacity
Mechanical Performance: Tensile strength, elongation, and breaking force
Testing Methods: Procedures for verifying conductor compliance through mechanical and electrical tests
Standard Designations
A typical ACSR conductor per GB/T 1179 is denoted as:
JL/G1A-240/30
J: Indicates concentric stranding
L: Aluminum wire (hard-drawn)
G1A: Type and strength of galvanized steel core
240/30: Cross-sectional area of aluminum/steel in mm²
Custom constructions and sizes are also available based on client specifications or project needs.
Referenced Standards
GB/T 1179 may cross-reference standards such as:
IEC 61089 – International standard for bare overhead conductors
ASTM B232 – U.S. standard for ACSR conductor construction
GB/T 3956 – General rules for conductor classification
Need a Quotation or Technical Sheet?
We provide complete ACSR conductor catalogs, test certificates, and engineering support for projects requiring compliance with GB/T 1179 or other global standards.