Classification and application of bare conductor

Bare conductor is one of the most commonly used conductors. Its model is represented by the material, structure and cross-sectional area of the conductor.

1. Aluminum conductor

The conductivity and mechanical strength of aluminum conductor are not as good as copper conductor. Compared with copper, the conductivity of aluminum is 60.4% of copper; The mechanical strength of aluminum (0 = 157n / mm ') is also relatively small, 41.1% of that of copper, and its chemical corrosion resistance is also relatively poor. However, the quality of aluminum is small, the density of aluminum is 2.7g/cm ", and the reserve of aluminum is high and the price is low. Therefore, aluminum is also an ideal conductor material. The nature of aluminum determines that aluminum wire is generally used for overhead distribution lines with small span, but aluminum wire should not be used in coastal areas or near chemical plants.

2. Copper conductor

Copper conductor has excellent conductivity, high mechanical strength and strong corrosion resistance. The density of copper is 8.9g/cm ", which is an ideal conductor material. However, because copper is widely used in industry, copper wire is generally only used for distribution lines in areas with high current density or serious chemical corrosion.

3. Aluminum conductor steel reinforced

In order to make full use of the advantages of aluminum and steel to make up for their shortcomings, they are combined to make aluminum conductor steel reinforced. ACSR has high mechanical strength. The mechanical stress it bears is shared by steel cored wire and aluminum wire, and the skin effect of AC current can make the current passing through steel cored wire almost zero, and the current is basically conducted by aluminum wire. Therefore, ACSR has good electrical and mechanical properties and is suitable for large span overhead distribution lines.

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