1.Introduction: The annealed conductor of Kraft Paper Covered Magnet Wire is extruded or dawn from oil-free copper rod or electrical round aluminum rod with certain specification mould. Then the copper or aluminum conductor is wrapped with two layers' or more than two layers' insulation paper including telephone paper, cable paper, high voltage paper, turn-to turn insulation paper. The product is widely applied in oil-immersed transformers and other similar electrical instruments. The electrical bare copper or aluminum wire with extrusion process is the ideal material for kraft paper wrapped copper or aluminum wire.
2.Standard: GB/T 7672-2008
3.Production Range:
Aluminum Rectangular Wire
Narrow border size a: 1.00-8.00mm
Wide border size b: 3.00-25.00mm
Copper Rectangular Wire
Narrow border size a: 0.90-5.60mm
Wide border size b: 2.00-16.00mm
Copper or Aluminum Round Wire
Diameter: Φ1.7-Φ8.0mm
If specification is out of range, please don't hesitate to contact us.
4.Material:
Aluminum rectangular wire should conform to GB5584.3-2009, the resistivity (20℃) is no more than 0.0280Ωmm²/m. Copper rectangular wire should conform to GB5584.2-2009, the resistivity (20℃) is no more than 0.01724Ωmm²/m.
5.Thickness of kraft paper wrapped round or rectangular wire should conform to the following table or mutual consultation between supply and demand requirements:
Kraft Paper Wrapped Round Wire Unit: mm
| Conductor Nominal Diameter | 1.00≤d≤5.00 | |||||
| Nominal Insulation Thickness | 0.30 | 0.45 | 0.80 | 1.20 | 1.80 | 4.25 |
| Deviation | ±0.05 | ±0.05 | ±0.10 | ±0.12 | ±0.15 | ±0.30 |
Note: If thickness is between two specification, please take the deviation corresponding to large size.
Kraft Paper Wrapped Rectangular Wire Unit: mm
| Insulation Thickness | ||||||||
| Nominal Insulation Thickness | 0.45 | 0.60 | 0.95 | 1.35 | 1.60 | 1.95 | 2.45 | 2.95 |
| Maximum Insulation Thickness (A-a) | 0.57 | 0.74 | 1.14 | 1.56 | 1.84 | 2.23 | 2.77 | 3.32 |
| Minimum Insulation Thickness(B-b) | 0.40 | 0.53 | 0.85 | 1.20 | 1.45 | 1.80 | 2.30 | 2.75 |
6.Bending Standard of kraft paper wrapped Wire
Kraft Paper Wrapped Round Wire Unit: mm
| Insulation Thickness | Experimental method | Rod Diameter |
| 0.30≤σ≤0.80 | Involution | 100 |
| 1.20≤σ≤4.25 | 150 |
Kraft paper wrapped rectangular wire Unit: mm
| Insulation Thickness | Experimental method | Rod Diameter |
| 0.30≤σ≤0.80 | Broad Side Bending | 150 |
| 1.20≤σ≤4.25 | 200 |
