ACSR Conductor Complete Guide: Specifications, Applications & Selection

What is ACSR Conductor?

ACSR stands for Aluminum Conductor Steel Reinforced. It is the most widely used overhead conductor for power transmission and distribution lines worldwide. The conductor consists of a solid or stranded steel core surrounded by one or more layers of concentrically stranded aluminum wires.

The steel core provides mechanical strength for long spans, while the aluminum strands carry the electrical current. This combination delivers an optimal balance of strength, conductivity, and cost-effectiveness.

ACSR Construction & Design

An ACSR conductor typically has:

• Steel core — galvanized steel wires providing tensile strength
• Aluminum layers — 1350-H19 grade aluminum wires carrying electrical current
• Grease filling (optional) — for corrosion protection in coastal environments

The stranding configuration is expressed as the number of aluminum wires over steel wires. For example, 26/7 means 26 aluminum wires over 7 steel wires.

Common Stranding Configurations

| Configuration | Steel Ratio | Typical Use | |---------------|-------------|-------------| | 6/1 | High | Distribution, short spans | | 26/7 | Medium | Transmission, general purpose | | 54/7 | Low | Long-span transmission | | 54/19 | Very High | River crossings, extra-long spans |

Standard ACSR Sizes & Specifications

Here are the most commonly ordered ACSR sizes based on our factory's production data:

| Code Name | Al/St Area (mm²) | Stranding | Overall Diameter (mm) | Weight (kg/km) | Rated Strength (kN) | |-----------|------------------|-----------|----------------------|----------------|---------------------| | Rabbit | 50/8 | 6/1 | 9.45 | 215 | 16.3 | | Dog | 100/17 | 6/7 | 14.15 | 394 | 32.7 | | Wolf | 150/25 | 30/7 | 17.28 | 576 | 52.1 | | Lynx | 175/30 | 30/7 | 18.13 | 674 | 60.7 | | Panther | 200/33 | 30/7 | 20.04 | 767 | 68.9 | | Zebra | 400/50 | 54/7 | 28.62 | 1621 | 131.9 | | Moose | 500/65 | 54/7 | 31.77 | 2004 | 159.2 |

Applications of ACSR

ACSR conductors are used across different voltage levels:

• Low voltage (LV) — Rural electrification, last-mile distribution
• Medium voltage (11kV–33kV) — Urban and suburban distribution networks
• High voltage (66kV–220kV) — Sub-transmission lines
• Extra-high voltage (330kV–765kV) — Long-distance bulk power transmission

Key advantages:

1. High strength-to-weight ratio for long spans
2. Economical compared to all-aluminum alternatives for equivalent strength
3. Well-established manufacturing standards (IEC 61089, ASTM B232, BS 215)
4. Wide range of sizes available for different applications
5. Proven reliability — billions of km installed globally

How to Select the Right ACSR

When choosing ACSR for your project, consider these factors:

1. Span Length & Terrain

Longer spans and mountainous terrain require higher steel ratios for mechanical strength. Use 54/19 or 54/7 configurations for spans exceeding 400m.

2. Current Carrying Capacity

Calculate the required ampacity based on your load projections. Larger cross-sections carry more current but cost more and need stronger tower structures.

3. Environmental Conditions

• Coastal areas — Choose greased ACSR or consider ACSR/AW (aluminum-clad steel core) for corrosion resistance
• Ice-prone regions — Factor in ice loading when selecting conductor size
• High-temperature zones — Consider thermal rating and sag characteristics

4. Standards Compliance

Different markets require different standards:

• IEC 61089 — International standard, widely accepted
• ASTM B232 — North American standard
• BS 215 — British standard, used in many Commonwealth countries
• GB/T 1179 — Chinese national standard

Quality Control at Our Factory

Every batch of ACSR we produce undergoes rigorous testing:

• Breaking load test
• Electrical resistance measurement
• Dimensional inspection (wire diameter, lay length)
• Zinc coating weight and uniformity test (for steel core)
• Wrapping and stress test

We hold ISO 9001, IEC, and KEMA certifications, and can produce to any international standard upon request.

Packaging & Delivery

ACSR conductors are supplied on steel or wooden drums, with proper protection for sea transport. Standard drum lengths range from 1,000m to 5,000m depending on conductor size.

Our typical lead time is 15–25 days for standard sizes, with annual production capacity exceeding 50,000 tonnes.

Frequently Asked Questions

What is the difference between ACSR and AAC?

AAC (All Aluminum Conductor) has no steel core — it's made entirely of aluminum. AAC offers better conductivity per unit weight but less mechanical strength. ACSR is preferred for longer spans, while AAC works well for shorter spans in distribution networks.

Can ACSR be used in coastal environments?

Yes, but you should specify greased ACSR or ACSR/AW (with aluminum-clad steel core) for coastal installations. The aluminum cladding protects the steel core from salt-spray corrosion.

What is the minimum order quantity?

Our standard MOQ is one production drum (typically 2,000–5,000m depending on size). For common sizes like Dog, Wolf, and Rabbit, we maintain ready stock.

Do you supply ACSR to international standards?

Yes. We produce ACSR to IEC 61089, ASTM B232, BS 215, NFC 34-125, and other standards. Custom specifications are also available.