Overview
IEC 60317-84:2021 is an international standard published by the International Electrotechnical Commission (IEC). This standard specifies the requirements for polyesterimide enamelled round copper winding wires classified under thermal class 200. The enamel coating is based on polyesterimide resin, which may be chemically modified while retaining the resin's chemical identity and satisfying all prescribed specifications. The standard covers various nominal conductor diameters and ensures performance characteristics suitable for demanding electrical and electronic applications.
Key Topics
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Scope and Application
IEC 60317-84:2021 applies to enamelled round copper winding wires coated with a single layer of polyesterimide resin enamel. This coating may be modified with additives while maintaining the original resin's chemical identity to enhance performance or application-specific characteristics.
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Thermal Class 200
The standard defines class 200 wires as having a temperature index of at least 200 °C and a heat shock temperature tolerance of at least 220 °C. These parameters ensure the wire can withstand high temperatures typical in electrical equipment windings.
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Conductor Diameter Grades
The wire diameters covered in the document vary across three grades:
- Grade 1: 0.018 mm up to and including 3.150 mm
- Grade 2: 0.020 mm up to and including 5.000 mm
- Grade 3: 0.0250 mm up to and including 1.600 mm
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Test Methods and Performance Criteria
The standard details specific testing procedures including:
- Electrical resistance
- Elongation and springiness
- Flexibility and adherence to enamel coating
- Heat shock resistance
- Cut-through resistance at elevated temperatures
- Resistance to abrasion, solvents, refrigerants
- Dielectric properties such as breakdown voltage and dissipation factor
- Solderability and bonding characteristics
- Resistance to hydrolysis and transformer oil exposure
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Packaging and Quality Assurance
Requirements for proper packaging ensure the winding wires maintain quality and integrity during transport and storage.
Applications
IEC 60317-84 polyesterimide enamelled round copper wires of class 200 are widely used in the manufacturing and operation of electrical devices where thermal endurance and mechanical resilience are critical. Applications include:
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Electric Motors and Generators
Suitable for stator and rotor windings where insulation integrity under thermal stress is essential.
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Transformers and Inductors
Ensures reliable insulation and electrical performance in coils subjected to thermal cycling.
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Electromechanical Devices
Used in solenoids, relays, and actuators that operate at elevated temperatures.
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High-Temperature Electrical Equipment
Applicable where enhanced thermal class insulation is mandatory to meet safety and longevity requirements.
Adhering to the IEC 60317-84 standard guarantees consistent quality, performance, and safety in these high-demand electrical components.
Related Standards
IEC 60317-84:2021 is part of the broader IEC 60317 series, which provides specifications for various types of winding wires. Related standards include:
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IEC 60317-0-1:2013 (and Amendment 1:2019)
General requirements and dimensions for enamelled round copper wires.
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IEC 60851 Series
Test methods applicable for winding wires, including chemical properties testing.
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IEC 60264 Series
Standards covering the packaging of winding wires to preserve quality.
Together, these interconnected standards form a comprehensive framework for the specification, testing, and handling of winding wires across the electrotechnical industry.
This standard ensures that polyesterimide enamelled round copper wires meet stringent performance criteria essential for safety, durability, and functionality in electrical equipment. Adopting IEC 60317-84:2021 promotes international uniformity, quality assurance, and material traceability in winding wire manufacturing and application.