Transformer winding aluminum strips are mainly made from industrial pure aluminum grades such as 1050, 1060, 1070, and 1350. The key differences between these grades lie in aluminum purity and corresponding conductivity.
When choosing, it is necessary to balance conductivity and cost. 1070 and 1350 are suitable for high-efficiency applications, 1060 is suitable for most standard transformers, and 1050 meets basic requirements.
When selecting materials, alloy grade is only one part. To prevent insulation failure, ensure that the supplier provides products with burr-free edges and rounded corners (chamfers).
Transformer Aluminum Strip Specification Comparison
| Alloy Grade | Aluminum Purity | Conductivity (IACS) | Main Applications |
| 1050 (O) | 99.50% | 60.0% | Standard industrial use |
| 1060 (O) | 99.60% | 61.5% | Most distribution transformers |
| 1070 (O) | 99.70% | 62.5% | High-efficiency systems |
| 1350 (O) | 99.50%+ | 61.8% | International electrical exports |
Haomei Transformer Aluminum Strip Quality Control
At Haomei, we implement stringent quality control measures to ensure that our transformer aluminum strips meet the highest industry standards for electrical conductivity, mechanical strength, and reliability. Our aluminum strips undergo rigorous testing and treatment processes to guarantee optimal performance in transformer applications.
- Burr Height: Maintained below 0.01 mm to prevent inter-layer short circuits, ensuring reliable performance in transformer windings.
- Annealing Process: Only the "O" (fully annealed) condition is used, ensuring the strip is soft and flexible enough for tight winding without springing back, reducing the risk of mechanical failure.
- Surface Quality: Our aluminum strips are free from oil stains, scratches, or defects, ensuring perfect bonding with the insulation film and minimizing electrical losses.
Characteristics to Consider When Choosing Aluminum Strips
When selecting aluminum strips for transformer windings, consider the following characteristics:
- Conductivity: The higher the purity of the aluminum, the better its conductivity. Choose a grade that matches the electrical requirements of the transformer.
- Strength: Although aluminum is softer than copper, its strength is sufficient to meet the needs of most transformer applications. Ensure that the aluminum strip meets the required strength for winding.
- Flexibility: The aluminum strip should have enough flexibility to maintain its shape during the winding process without cracking. This is especially important in high-voltage transformers.
How to Choose the Right Aluminum Strip Grade for Transformers?
When choosing the right aluminum strip for transformers, consider the following points carefully:
- Cost priority: If the conductivity requirements are not extremely stringent, 1050 is a cost-effective choice.
- Standard performance: 1060 offers balanced performance and is the preferred choice for most standard transformer windings with wide applications.
- Best conductivity: 1350 and 1070 are suitable for applications with strict efficiency and loss requirements, with 1070 offering the best performance, while 1350 is a specialized electrical-grade aluminum.
Frequently Asked Questions: Transformer Winding Aluminum Strips
What is the best aluminum material for transformer windings?
The most commonly used aluminum grades for transformer windings are 1050 and 1060, while 1070 is used for high-performance applications.
Can aluminum be used in high-voltage transformers?
Yes, aluminum strips can be used in high-voltage transformers, especially grades like 1070, which have higher conductivity and durability.
Why is aluminum preferred over copper in some transformer applications?
Aluminum is lighter and more cost-effective than copper, making it an ideal choice for reducing transformer weight and overall production costs, while still maintaining sufficient conductivity.