
What are the primary types of conductors used for overhead lines?
2025-08-13The conductor is the most critical material in any overhead line, as it's what carries the electrical current. There are several common types, chosen based on factors like voltage, distance, mechanical strength, and cost.
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All Aluminum Conductor (AAC): Made of pure aluminum, AAC is lightweight and has good conductivity, making it ideal for short spans in urban areas.
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All Aluminum Alloy Conductor (AAAC): This conductor is stronger and more corrosion-resistant than AAC, making it suitable for medium-length spans and coastal or industrial environments.
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Aluminum Conductor Steel Reinforced (ACSR): The most common type for high-voltage transmission. It features a strong steel core surrounded by aluminum strands. This combination provides excellent mechanical strength for long spans while the aluminum provides good conductivity.
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Aerial Bundled Cable (ABC): Used for low-voltage distribution, ABC consists of multiple insulated conductors twisted together. This design improves safety and reduces the risk of electrical faults.
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