1060 Aluminum Strip For Transformer Winding

1060 aluminum strip is an ideal material for manufacturing transformer windings, as its properties perfectly meet the core requirements of transformer windings for conductivity, processability, and reliability. Its main component is aluminum, with an aluminum content of over 99.6%. 1060 aluminum strip possesses excellent electrical and thermal conductivity and corrosion resistance, making it suitable for use as a transformer winding material.

Characteristics of 1060 aluminum strip for transformer winding:

– High purity and conductivity

1060 aluminum strip contains over 99.6% aluminum, classifying it as industrially pure aluminum. Its conductivity is second only to copper (metal conductivity ranking: silver > copper > gold > aluminum > nickel > steel alloys). Although its conductivity is slightly lower than copper, its price is only about one-third that of copper, giving it a significant advantage in the cost-sensitive power equipment sector.

– Excellent machining performance

Soft O temper characteristics: 1060 aluminum strip is supplied in a soft state, with high elongation (typically ≥25%) and moderate tensile strength (approximately 95-130 MPa). It can easily withstand deformation processes such as stamping, stretching, and bending, meeting the machining requirements of complex transformer winding shapes.

Surface quality: Smooth surface without burrs; edges can be chamfered to reduce damage to the insulation layer during winding and lower the risk of partial discharge.

– Corrosion resistance and stability:

Aluminum easily forms a dense oxide film (Al₂O₃) in air, exhibiting superior corrosion resistance compared to copper, making it particularly suitable for humid environments (such as underground facilities and coastal areas). After passivation treatment, the salt spray corrosion resistance time can be extended to 240 hours, further extending service life.

Advantages of using 1060 aluminum strip in transformer windings:

– Reduced equipment size and weight:

Aluminum’s density (2.7 g/cm³) is only one-third that of copper (8.9 g/cm³). Using 1060 aluminum strip significantly reduces the weight of transformer windings, facilitating installation and transportation, while also reducing the amount of insulation material used, thus lowering overall costs.

– Improved insulation performance and safety:

Low partial discharge: The surface smoothness of transformer aluminum strip is superior to copper strip, reducing electric field concentration. Partial discharge can be controlled below 3 pC, meeting the stringent insulation standards for dry-type transformers.

Flame retardant and pollution free: Aluminum’s melting point (660℃) is higher than copper’s (1083℃). It is less prone to melting and dripping in a fire and does not produce toxic gases during combustion, meeting environmental protection requirements.

– Adaptable to humid environments:

1060 aluminum strip has passed salt spray testing. After three years of operation in humid environments, the surface oxide layer thickness only increases by 0.3 μm (industry average 1.2 μm), ensuring long-term stability.

Technical parameters and standard compliance of aluminum strip for transformer:

– Chemical composition:

Complies with regulations, total impurities ≤0.4% (e.g., Fe≤0.35%, Si≤0.25%).

– Mechanical properties:

Tensile strength 95-130MPa, elongation ≥25%, Vickers hardness 28-35HV, meeting the mechanical strength requirements of transformer windings.

– Electrical properties:

Conductivity ≥60%IACS (International Annealed Copper Standard), resistivity ≤0.028Ω·mm²/m, ensuring low-energy operation.

– Dimensional accuracy:

Thickness deviation ≤±3.2% (when roll gap accuracy is ±0.05mm), width range 20-1650mm, supporting customized production.

1060 aluminum strip is widely used in high-voltage/low-voltage windings of dry-type transformers in high-rise buildings, commercial centers, and other locations. Replacing copper strip reduces costs by more than 40%, while meeting the requirements of small size, low noise, and low maintenance costs. In equipment such as solar inverters and capacitors, 1060 aluminum strip has become an economical alternative to copper strip due to its high conductivity and corrosion resistance.