IEC 60317-28:2013 specifies the requirements of enamelled rectangular copper winding wire of class 180 with a sole coating based on polyesterimide resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements.
NOTE A modified resin is a resin that has undergone a chemical change, or contains one or more additives to enhance certain performance or application characteristics.
The range of nominal conductor dimensions covered by this standard is:
| width | min.2,0mm | max.16,0mm |
| thickness | min.0,80mm | max.5,60mm |
Wires of grade 1 and grade 2 are included in this specification and apply to the complete range of conductors.
1.Wire Specifications Requirements
Class 180 is a thermal class that requires a minimum temperature index of 180 and a heat shock temperature of at least 200 ℃.
The temperature in degrees Celsius corresponding to the temperature index is not necessarily that at which it is recommended that the wire be operated and this will depend on many factors,including the type of equipment involved.
2.Performance Requirements
The standard specifies a number of performance indicators and test methods for enameled wire to ensure its reliability in practical applications. Here are some important data and test requirements:
2.1 Dimensions and appearance
2.1.1 Conductor size: The cross-sectional dimensions of the copper conductor should be within the specified tolerance range.
2.1.2 Insulation thickness: The insulation thickness of the enameled wire should be uniform and within the range specified in the standard.
2.1.3 Appearance: The surface of the enameled wire should be smooth and free of obvious defects (such as bubbles, bare copper, etc.).
2.2 Electlrica performance
2.2.1 Insulation resistance: The insulation resistance of the enameled wire should meet the requirements to ensure electrical performance in high temperature and high humidity environments.
2.2.2 Withstand voltage: The enameled wire should be able to withstand the specified high voltage to test its electrical insulation performance.
2.3 Thermal performance
2.3.1 Thermal shock test: The enameled wire should be able to keep its insulation layer intact at high temperatures without cracking or peeling.
2.3.2 High temperature tensile strength: The enameled wire should have sufficient mechanical strength at high temperatures to ensure its reliability in high temperature applications.
2.4 Mechanical properties
2.4.1 Tensile test: The enameled wire should have sufficient tensile strength and elongation.
2.4.2 Bend test: The enameled wire should be able to be bent at the specified bending radius without cracking or damage.
2.5 Chemical resistance
2.5.1 Solvent resistance: The enameled wire should be resistant to corrosion by common chemical solvents.
2.5.2 Oil resistance: The enameled wire should maintain its insulation and mechanical properties in an oil environment.
3.Specific data examples
The following are example data for some specific requirements in IEC 60317-28:2013:
3.1 Copper conductor size tolerance: For copper conductors with a width between 2.00mm and 6.00mm, the tolerance is ±0.020mm.
3.2 Insulation layer thickness: The insulation layer thickness of the enameled wire should be 0.050mm to 0.150mm, depending on the wire diameter.
3.3 Insulation resistance: At room temperature, the insulation resistance should be not less than 1000 MΩ/km.
3.4 Withstand voltage: For different sizes of enameled wire, the withstand voltage test value is generally between 2000V and 5000V.
4.Test Methods
All test methods are performed in accordance with IEC 60851 standard. These tests covered electrical, mechanical and thermal properties:
4.1 Electrical testing
4.1.1 Dielectric strength: Tested at 200°C, the insulation layer was able to withstand voltages up to 10kV without breakdown.
4.1.2 Insulation resistance: Measured at 180°C, the insulation resistance reached 100MΩ, indicating excellent electrical insulation performance.
4.2 Mechanical testing
4.2.1 Tensile strength: Tests showed that the copper wire had a tensile strength of 350MPa at 180°C, ensuring mechanical strength in high temperature environments.
4.2.2 Ductility: At 180°C, the copper wire had an elongation of 20%, showing good mechanical properties.
4.3 Thermal testing
Thermal shock test: Thermal shock tests were conducted at 220°C and the copper wire did not show any damage or performance degradation.
5.Packaging and Handling
Proper packaging is essential to maintain the performance of copper wire:
5.1 Spools or containers: The copper wire should be wound evenly and compactly on a spool or placed in a container. Each spool or container should not contain more than one length of copper wire unless agreed by both parties.
5.2 Coil: For copper wire delivered in coil form, the dimensions and maximum weight shall be agreed upon by the purchaser and the supplier. Any additional protective measures shall also be agreed upon by both parties.
- Specific Test Data Display
6.1 Electrical test data
| Dielectric strength | 200°C, 10kV No breakdown |
| Insulation resistance | 180°C 100MΩ |
6.2 Mechanical test data
| Tensile strength | 180°C 350MPa |
| Ductility | 180°C 20% |
6.3 Thermal test data
| Thermal shock test | 220°C No damage |
