IEC 60317-2:2012 Overview
IEC 60317-2:2012 is an international standard published by the International Electrotechnical Commission (IEC) that specifies the requirements for solderable polyurethane enamelled round copper winding wire, class 130, featuring a bonding layer. This standard is crucial for manufacturers, designers, and engineers working with electrical equipment requiring high-performance winding wires. By setting clear technical criteria for wire properties such as coating, thermal class, solderability, and durability, IEC 60317-2:2012 ensures product reliability and compatibility in electrical and electromechanical applications.
The standard applies to winding wires with nominal conductor diameters from 0.020 mm up to and including 2.000 mm and covers dual-coated wires. The underlying enamel is based on polyurethane resin-modifiable but chemically consistent-combined with a thermoplastic bonding layer. The 2012 edition introduces new requirements for wire appearance and pin hole testing, enhancing quality control.
Key Topics in IEC 60317-2:2012
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Material Specifications
Defines the use of polyurethane resin for the enamel coating with an additional thermoplastic bonding layer ensuring strong adhesion and solderability.
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Thermal Class and Temperature Index
Wire is classified as class 130, rated for a temperature index of 130 °C, with minimum heat shock resistance of 155 °C. This indicates suitability for high-temperature applications.
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Dimensions and Electrical Properties
Standardizes wire diameter ranges and electrical resistance parameters critical for consistent performance in winding applications.
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Mechanical Properties
Requirements for elongation, springiness, flexibility, and adherence to maintain robustness during winding and operation.
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Durability Tests
Includes tests for heat shock, cut-through resistance, abrasion, solvent resistance, and resistance to transformer oils, ensuring operational longevity.
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Solderability
Specific solderability requirements depending on wire diameter ensure effective electrical connections without damaging the insulation.
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Appearance and Quality Control
New subclause on appearance and pin hole tests enhance inspection criteria to minimize production defects.
Applications
IEC 60317-2:2012 standardizes winding wire critical for electrical machines and components that demand reliable insulation and solderability, including:
- Electric motors and generators where durable, high-temperature resistant winding wires are essential to performance and longevity.
- Transformers and inductors requiring high-quality copper wire insulated with polyurethane enamel for electrical insulation and mechanical strength.
- Solenoids and relays where fine-diameter copper wire is soldered onto terminals and must resist heat and mechanical stresses.
- Electromechanical devices including sensors and actuators using polyurethane enamelled copper wires for consistent electrical behavior under thermal and mechanical loads.
The standard supports reliable manufacturing processes and helps manufacturers comply with internationally recognized performance and safety standards, ultimately improving product quality and reducing failures in electrical systems.
Related Standards
- IEC 60317-0-1:2008 – General requirements for enamelled round copper wires, providing foundational test methods and terms used in IEC 60317-2.
- IEC 60851 – Specifies test methods for winding wires, complementing IEC 60317 series for evaluation of wire properties.
- IEC 60264 – Defines packaging requirements for winding wires to ensure transport and storage integrity.
These related standards together provide a comprehensive framework addressing material specifications, testing methods, and handling practices crucial for quality winding wire production.
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