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Time: 2026-08-10 05:09:39 Source: Henan Province Jianyun Cable Co., Ltd.
Author: Jianyun Cable
Bare conductor is one of the most widely used conductor solutions for overhead power transmission and distribution. Unlike insulated power cables, a bare conductor does not include an external insulation layer or protective jacket. Instead, it is installed on poles or transmission towers with suitable electrical clearances and insulators.
For long-distance overhead lines, electrical conductivity alone is not enough. The conductor must also withstand tension, wind, span weight, temperature changes, and other mechanical loads. ACSR construction addresses these requirements by combining conductive aluminum strands with a strong steel core.
Jianyun Cable supplies ACSR bare conductor for utility networks, long-span transmission lines, substations, industrial power systems, and infrastructure projects requiring a practical balance between electrical performance and mechanical strength.
Recommended Bare Conductor:
ACSR Bare Overhead Conductor from Jianyun CableA bare conductor is an electrical conductor without an insulating covering. It is mainly installed in overhead transmission and distribution systems where air provides the required insulation between energized conductors and surrounding structures.
Bare conductors are commonly manufactured from aluminum, aluminum alloy, or aluminum combined with steel reinforcement. Different conductor constructions provide different combinations of conductivity, tensile strength, weight, corrosion resistance, and sag performance.
Common bare conductor types include AAC, AAAC, ACSR, and AACSR. Among them, ACSR is widely selected for applications where the conductor must carry electrical current efficiently while also supporting significant mechanical loads.
ACSR stands for Aluminum Conductor Steel Reinforced. It consists of one or more layers of aluminum wires concentrically stranded around a galvanized steel core.
The aluminum strands provide most of the electrical conductivity, while the steel core provides tensile strength. This combination makes ACSR suitable for long overhead spans, utility transmission networks, and locations where conductor sag and mechanical loading must be carefully controlled.
The proportion of aluminum and steel can be adjusted according to the electrical and mechanical requirements of a project.
| Component | Main Function |
|---|---|
| Aluminum strands | Carry electrical current efficiently |
| Galvanized steel core | Provides tensile strength and mechanical support |
| Concentric stranding | Creates a stable conductor structure |
| Bare outer surface | Supports efficient heat dissipation in open-air installation |
| Optional protective grease | Provides additional protection for the steel core against corrosion |
| Advantage | Practical Benefit |
|---|---|
| Good electrical conductivity | Supports efficient overhead power transmission |
| High tensile strength | Suitable for long spans and demanding mechanical loads |
| Steel reinforcement | Helps control conductor sag and tension |
| Low conductor weight | Reduces load on transmission towers compared with heavier conductor materials |
| Flexible aluminum-to-steel ratio | Allows conductor design to match project requirements |
| Established overhead design | Widely used in utility and infrastructure power networks |
| Feature | ACSR | AAC |
|---|---|---|
| Construction | Aluminum strands with steel reinforcement | All-aluminum conductor |
| Mechanical strength | Higher | Lower |
| Conductivity | Good | High for equivalent aluminum area |
| Typical span | Long and mechanically demanding spans | Shorter distribution spans |
| Typical application | Transmission and major distribution networks | Urban and short-span distribution |
| Feature | ACSR | AAAC |
|---|---|---|
| Conductor material | Aluminum with galvanized steel core | Aluminum alloy throughout |
| Mechanical strength | Very high due to steel reinforcement | High without steel reinforcement |
| Corrosion consideration | Steel core requires suitable corrosion protection | No steel core |
| Typical use | Long spans and heavy mechanical loading | Distribution and corrosion-sensitive environments |
ACSR conductors are available in multiple standardized sizes and stranding arrangements. Each conductor code represents a specific combination of aluminum area, steel area, conductor diameter, weight, electrical resistance, breaking load, and current rating.
| Conductor Code | Typical Selection Consideration |
|---|---|
| Turkey | Smaller overhead transmission or distribution requirements |
| Swan | Light overhead distribution applications |
| Sparrow | General overhead network applications |
| Robin | Medium conductor capacity and utility distribution |
| Raven | Higher current and mechanical requirements |
| Quail | Larger overhead transmission requirements |
Different markets and utility projects may specify different conductor standards. Jianyun Cable can provide ACSR designs according to multiple common international requirements.
| Standard | Typical Market or Reference |
|---|---|
| ASTM B232/B232M | North American ACSR conductor specifications |
| BS 215-2 | British overhead conductor specifications |
| BS EN 50182 | European stranded overhead conductor requirements |
| IEC 61089 | International overhead conductor specification |
| DIN 48204 | German conductor reference |
| JIS C 3110 | Japanese ACSR conductor specification |
| AS 3607 | Australian overhead conductor reference |
Bare conductor selection should consider both electrical and mechanical requirements. Selecting only by conductor cross-sectional area may not provide sufficient information for a reliable overhead line design.
| Selection Factor | Recommendation |
|---|---|
| Current capacity | Match conductor size to expected continuous electrical load |
| Span length | Choose sufficient tensile strength for the tower or pole spacing |
| Breaking load | Verify mechanical strength against line-design requirements |
| Sag | Maintain required ground and phase clearances |
| Wind loading | Evaluate local wind conditions and conductor tension |
| Environmental conditions | Consider humidity, corrosion, temperature, and pollution |
| Electrical resistance | Compare conductor resistance and transmission losses |
| Applicable standard | Confirm ASTM, IEC, BS, DIN, JIS, AS, or project specifications |
Jianyun Cable supplies ACSR bare conductor for long-distance overhead transmission, utility distribution networks, substation connections, rural electrification, and industrial infrastructure projects.
Multiple conductor codes, stranding arrangements, aluminum-to-steel ratios, current ratings, and mechanical properties are available to meet different electrical and overhead line requirements.
View Product Details and Request a Quote:
ACSR Bare Overhead Conductor – Robin, Raven, Quail and MoreBare conductor remains a proven solution for overhead transmission and distribution because it combines efficient electrical performance with relatively low weight and economical construction.
For long spans and demanding mechanical conditions, ACSR provides additional strength through its galvanized steel core while maintaining the conductivity advantages of aluminum strands.
Jianyun Cable supplies ACSR bare conductor in multiple standard sizes and stranding configurations for utilities, contractors, distributors, and infrastructure projects.
Request Your Bare Conductor Quotation:
Contact Jianyun Cable for ACSR Bare ConductorBare conductor is mainly used for overhead electrical transmission and distribution lines, utility networks, substations, industrial power systems, and other open-air electrical installations.
ACSR means Aluminum Conductor Steel Reinforced. It consists of conductive aluminum strands installed around a galvanized steel core that provides mechanical strength.
The steel core increases tensile strength and helps the conductor support longer spans, wind loads, installation tension, and its own suspended weight.
AAC consists entirely of aluminum, while ACSR combines aluminum strands with a steel core. ACSR generally provides higher mechanical strength for long-span overhead lines.
Yes. ACSR is widely used for long-distance overhead transmission because its steel reinforcement provides the tensile strength required for extended spans.
Selection should consider current capacity, electrical resistance, span length, conductor sag, breaking load, wind and environmental conditions, and the applicable technical standard.
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