Product Briefing
Transformer copper foil is made from high-quality electrolytic copper or special copper alloys. This ensures the foil's electrical conductivity, reaching 97-102% IACS (International Annealed Copper Standard). It is widely used in power industry high and low voltage transformer lines, dry-type transformers, and shallow-water, deep-sea, long-distance multi-channel, and microwave communication cables. The strip is narrow and thin, with a large roll diameter (up to 2,000 meters in length), and a width greater than 600 mm. Its applications are similar to those of enameled copper wire.
Transformer copper foil requirements are as follows:
1. The strip shape should be flat, with slight undulation permitted and a camber of no more than 2 mm/m.
2. Strip Edges: Trimmed, Rounded, and Rolled
1) Trimmed edges should be neat, with a thickness of ≥0.4 mm and edge burrs less than 0.05 mm; for thickness <0.4 mm, edge burrs less than 0.03 mm.
2) Corners should be rounded; edges should not be sharp, rough, or have protruding edges.
Relevant Parameters
Copper Foils For Transformer Winding Technical parameters
| Name | Copper Foils |
| Grade | Cu-ETP/C-11000/E -Cu58 |
| Temper | Soft(O),Hard(H) |
| Dimension | Thickness: 0.1-4.0mm; width: 20-1500mm |
| Standard | ASTM,EN 13599,GB-T 18813-2002 |
| Packing: In coil, Inner Diameter: 300mm, 400mm, 500mm, etc. | IEC, NEMA, GB, JIS |
The standard of Copper Coils
| INDUSTRY | USA | ITALY | CHINA | EURONORM | JAPANESE | |
| STANDARD | ASTM B5, B152 | UNI 5649 | GB/T | EN 1652 | DIN 1976 | JIS |
| C1100 | C11000 | Cu-ETP | T2 | CW004A | E-Cu 58 | C1100 |
Advantages of the product
Transformer Copper Foils Features
1. Super Thin, No Burrs and no scratch
2. Totally annealed
3. High strength
4. Above 99.80% IACS high electric conductivity
5. Excellent side camber 2mm/meter
The manufacturing process of transformer copper strips
it includes continuous up-casting, continuously extruded, milling face, rolling, welding, milling face, high annealing, rolling, low-temperature annealing, Cleaning and Passivation, aligning, cutting, chamfering, the main method by welding, the width for improving copper strips, meets the width requirement of transformer copper strips.
GNEE's copper products include
| Product Category | Standard | Typical Alloy | Common Forms / Types | Size Range (Thickness/Diameter) | Size Range (Width) | Size Range (Length) | Temper / Hardness |
|---|---|---|---|---|---|---|---|
| Copper Tube/Pipe | ASTM B75, B88, B280 EN 1057 |
C10200 (OFE) C12200 (DHP) |
Seamless ACR (Air Conditioning & Refrigeration) Medical Gas Capillary Tube |
0.5 mm - 6.0 mm (Wall Thickness) 3 mm - 300 mm (Outer Diameter) |
- | Straight Lengths: 1m - 6m Coils: 15m - 50m |
Annealed (Soft) Half-Hard Hard Drawn |
| Copper Sheet & Plate | ASTM B152, B465 EN 1652 |
C11000 (ETP) C10200 (OFHC) C19400 |
Sheet (≤6mm) Plate (>6mm) Shim Stock |
0.2 mm - 50 mm (Sheet: 0.2mm - 6mm) (Plate: 6mm - 50mm) |
100 mm - 1500 mm | 500 mm - 3000 mm or Coils |
Soft (Annealed) Quarter-Hard Half-Hard Hard Spring |
| Copper Bar & Rod | ASTM B133, B187 B301, B441 |
C11000 (ETP) C36000 (Free-Cutting) C14500 (Tellurium) |
Square Bar Flat Bar Hexagonal Bar Round Rod (Coiled) |
3 mm - 200 mm (Diameter/Thickness) |
6 mm - 200 mm (For Flat Bar) |
Straight: 1m - 4m Coils: (upon request) |
Soft (Annealed) Half-Hard Hard As Extruded |
| Copper Wire | ASTM B1, B2, B3 B174, B189 |
C11000 (ETP) C10100 (OFHC) C14420 (CuAg) |
Bare Wire Tinned Wire Bunched/Stranded Wire Profile Wire |
0.05 mm - 12 mm (AWG 44 - AWG 3) |
- | Coils: 5kg - 500kg Spools, Drums |
Annealed (Soft) Hard Drawn Spring Temper |
| Copper Foil | ASTM B370, B101 IPC-4562 |
C11000 (ETP) C10200 (OFHC) |
Rolled Foil Electrodeposited (ED) Foil |
0.005 mm - 0.2 mm (5µm - 200µm) |
50 mm - 1300 mm | Coils: 100m - 3000m | As Rolled (Hard) Annealed (Soft) Double Annealed |
