1050 Aluminum foils for transformer windings, composes of alloy 1050, commonly uses in the construction of transformer windings. Transformer windings consist of conductive material (aluminum or copper) that carries electrical current, and insulating material that electrically isolates different winding turns and layers.
The chemical composition of 1050 Series Aluminum Strip For transformer Winding is Al 99.5%, which has high conductivity and low price, and has become an indispensable material for power transformers.
The transformer 1050 aluminum foil is suitable for not only for low voltage dry type transformers, but also for oil immersed transformers and high voltage transformers.
The electrical conductivity of the 1050 aluminium foil strip is up to 61.0-63.0%, which meets the national standard and can meet the requirements of transformers winding under different voltages and frequencies.
Dimensions of 1050 Aluminum foil strip
| Thickness | Nominal Width | |||||
| ≤100 | >100–300 | >300–500 | >500–1250 | >1250–1650 | >1650–2000 | |
| Width Tolerance (+) | ||||||
| >0.20–0.60 | 0.5 | 0.6 | 1 | 3 | 4 | 4 |
| >0.60–1.00 | 0.5 | 0.6 | 1 | 3 | 4 | 4 |
| >1.00–3.00 | 0.5 | 0.6 | 1 | 3 | 4 | 4 |
Chemical Component :
| Elements | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Others | Al |
| % | 0.25 | 0.4 | 0.05 | 0.05 | 0.05 | – | 0.07 | 0.05 | 0.15 | 99.5 |
Mechanical properties :
| Temper | Tensile Strength (Rm/MPa) | Yield Strength (MPa) |
| 1050-O | 65-95 | Min20 |
| 1050-H12 | 85-125 | Min65 |
| 1050-H14 | 105-145 | Min85 |
| 1050-H16 | 120-160 | Min100 |
| 1050-H18 | Min135 | Min120 |
The main advantages of 1050 aluminum foil strip for transformer winding are as follows:
The surface quality of the foil is high and the conductivity is good
After annealing, the elongation of the foil can reach 1% or more
The shape of the foil is good, the thickness tolerance is small, the width tolerance is ± 0.2mm, and the thickness control below ± 5 microns
The annealing process gives the foil excellent plasticity, allowing it to stretch into cylindrical shapes during winding without cracking.
