Fiberglass Covered Winding Wire

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All parameters are defined in the GB/T 7672 series national standards, which are equivalent to the IEC 60317 international standard system, covering the full range of product specifications for different application scenarios:

1. ‌Dimensional Specifications‌:
   • Round copper conductors: Diameter range from 0.25mm to 6.0mm, with diameter deviations strictly controlled within ±0.02mm
   • Flat copper conductors: Narrow side dimension 0.80mm to 5.60mm, wide side dimension 2.00mm to 16.00mm
   • Insulation thickness: 0.20mm to 0.90mm, with 5 standardized grades for different voltage levels
2. ‌Voltage Withstand Performance‌:
   • Single glass-fiber covered wire: Breakdown voltage ≥ 350V
   • Double glass-fiber covered wire: Breakdown voltage ≥ 560V
   • Glass-fiber and film composite covered flat wire: Breakdown voltage reaches 5000V when the insulation thickness is 0.5mm to 0.6mm, tested by applying AC voltage for 1 minute without breakdown
3. ‌Heat Resistance Classes‌:
   • 130°C, 155°C, 180°C, and 200°C four standard grades, the 200°C grade product can maintain stable performance under long-term high-temperature operation
4. ‌Mechanical Performance‌:

• Maximum rebound angle ≤ 5.5°, ensuring excellent winding processability without springback deformation during high-speed coil winding
• Thermal shock resistance: No cracking of the insulating layer after being kept in a 200°C environment for 30 minutes

Authoritative Technical Standard References

The full set of manufacturing processes and performance requirements for glass-fiber covered winding wires are regulated by formal standards issued by the Standardization Administration of China, under the jurisdiction of the National Technical Committee 213 on Electric Wire and Cable:

• • • GB/T 7672.1-2008, General Provisions for Glass-Fiber Covered Rectangular Copper Winding Wires, which adopts IEC 60317-0-4:2006 equivalently, unifies the basic technical requirements for dimensions, resistance, elongation, and test methods of all glass-fiber covered flat copper winding wires.
    • GB/T 7672.6-2008, Glass-Fiber Covered and Film Wound Rectangular Copper Wires, which supplements the specifications for composite insulation products, adds 5 new insulation thickness grades, and upgrades the breakdown voltage test accuracy by increasing the number of test samples from 4 to 5.