Double-Glass Fiber Covered Copper (Aluminum) Wire
Double-Glass Fiber Covered Copper (Aluminum) Wire is a wire using an oxygen-free copper rod or electrical round aluminum rod under extrusion with specified mold or dawning and annealing procedure. Then wrapped with one or two layers of non*alkali glass fiber on the conductor, After impregnation and baking with required thermal endurance and consistency level insulating coatings, the fiberglass and conductor will become an integral product, There are three classes of this product which are 130、155、180. And there are four classes of insulation thickness which are 20、30、40、50. The product is widely used in oil-immersed transformers、electric reactor electromagnets、 welding machines and other similar electrical instruments.
1.Standard:GB7673-2008(IEC60371）and Enterprise Standards
2.Production Range:
Paper wrapped copper rectangular wire
Narrow side size a:1.18mm-5.6mm
Wide side size b:2.8mm-18mm
Paper wrapped aluminum rectangular wire
Narrow side size a:1.25mm-8mm
Wide side size b:3mm-18mm
4. The size of the conductor should conform to the table as follows：
| Narrow nominal side size a or wide nominalside size b(mm) | Deviation(mm) |
|---|---|
| a(b)＜3.15 | ±0.030 |
| 3.15＜a(b)≤6.30 | ±0.050 |
| 6.30＜a(b)≤12.50 | ±0.070 |
| 12.50＜a(b)＜16.00 | ±0.100 |
5.Conductor fillet radius r
| Nominal size(mm) | Fillet radius r | |
|---|---|---|
| Nominal size/mm | Deviation | |
| a≤1.00 | a/2 | — |
1.00| 0.5 | ±25% |
|
1.60| 0.65 |
| |
2.24| 0.8 |
| |
| a>3.55 | 1 | |
6.Maximum external size
Maximum external size of no more than the maximum size of the conductor adds maximum insulation thickness.
7.Elongation
| Narrow nominal side size a(mm) | Minimum elongation(%) | |
|---|---|---|
| ＞ | ≤ | |
| — | 2.5 | 30 |
| 2.5 | 5.6 | 32 |
Note: Non-proportional extension and elongation of semi-rigid copper conductors should conform to the following table.
| Type | Proof strength at non-proportional extension (N/mm2 ) | Min Elongation (%) | the resistivity of copper in 20℃ (Ωm²/m) |
|---|---|---|---|
| C1 | 100| 20 | 1/58.0 |
|
| C2 | 100| 20 | 1/57.5 |
|
100| 15 | 1/57.5 |
| |
| C3 | 100| 15 | 1/57.0 |
|
8.Rebound resilience
The rebound angle of conductor should be no more than to 5.5°
Note: semi-rigid copper should not follow above standard