Paper-covered wire is a wire that is annealed after an oxygen-free copper rod or electrical round aluminum rod is extruded or drawn through a certain specification mold, and then two or more layers of insulating paper.
Paper covered wire description
Paper-covered wire is a wire that is annealed after an oxygen-free copper rod or electrical round aluminum rod is extruded or drawn through a certain specification mold, and then two or more layers of insulating paper (including Telephone paper, cable paper, high-voltage cable paper, interturn insulation paper, etc.) are suitable for oil-immersed transformer coils and other similar electrical appliance winding wires.
Paper covered wire parameter
| Name | Paper covered wire | |||
| Diameter | 4mm | |||
| Standard | GB/T7673.3-2008 | |||
| Test item | Unit | Technical requirement | Test result | |
| appearance | Uniform, no missing layers, no wrinkles and cracks | pass | ||
| Bare wire | a | mm | ±0.05 | 3.99 |
| b | mm | ±0.10 | 14.98 | |
| Insulation film thickness | mm | 0.405----0.45 ----0.50 | 0.43 | |
| Resistance | Ω/m | ≤0.02785 | 0.02773 | |
| Elongation | >=17% | 24% | ||
| Packing overlap | ≥2 | 2 | ||
| Packing | Meet standard | Pass | ||
| Quality control results | Pass | |||
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