Aluminum Foil For Transformer

◆Comparison with copper strip

Aluminum coil winding transformers are becoming more and more popular. The aluminum strip of transformer is also used more and more on the transformer, and has been tested in practice. Compared with transformer copper strip, transformer aluminum strip winding has the following advantages:

● Low price: compared with copper strip, aluminum strip of transformer is much cheaper, which is the biggest advantage of aluminum foil strip of transformer.

● Light weight: The aluminum foil used for transformer has excellent flexibility, and can be made with a thickness of 0.08mm or less.

● Small size: the conductivity of aluminum foil for transformer winding is up to 61%, while that of pure copper is only 58%. Aluminum foil with the same section is thinner than copper foil, which can reduce the thickness and volume of transformer winding.

● High stability: the surface oxide film is easy to remove. The insulation strength is not affected when winding. The elongation is high, and it can be stretched for 2 mm without breaking.

● Easy winding: it has the excellent plasticity and can be made into various shapes. Good adhesion between layers, is conducive to forming good coils through adhesive tape or backing paper.

● Produce, inspect, transport, install, maintain and use according to certain standards. Both copper winding and aluminum winding transformers are safe and reliable.

◆Production process of transformer winding

1. Raw materials are furnace heating to remove impurities;

2. Cut into plates;

3. Put the plate into the cold rolling mill for rough rolling;

4. Put it into the hot rolling mill for finishing;;

5. Annealing;

6. Plate shears;

7. Packaging and transportation.

◆HS code for transformer winding

HS Code: 76069100.00

◆Hardness of aluminum foil for transformer winding

The typical Brinell hardness of the strip must be determined after annealing (Typical value of Brinell hardness: 18HB).