IEC 60317-0-4:2020: Glass-fiber-wound, Resin-or Varnish-impregnated, Bare or Enameled Rectangular Copper Wire

The IEC 60317-0-4:2020 standard details the manufacturing and performance requirements for glass-fiber-wound, resin- or varnish-impregnated, bare or enameled rectangular copper wire. These wires are key components in a variety of electrical applications such as transformers, motors, and reactors. Ensuring that these wires meet stringent international standards is critical for their reliability, safety, and performance.

IEC 60317-0-4:2020 Overview
IEC 60317-0-4:2020 specifies general requirements for glass-fiber-wound, resin- or varnish-impregnated, bare or enameled rectangular copper wire. These wires can be bare copper or enameled. The standard covers several key aspects, including thermal, electrical, and mechanical properties, as well as dimensions and tolerances.

Key Specifications

  1. Thermal Properties
    Thermal Class: The standard specifies different thermal classes based on the maximum continuous operating temperature of the wire. For example, Class 155 (Class F) and Class 180 (Class H) indicate that the wire can operate at temperatures of 155°C and 180°C, respectively. This classification is critical for applications involving high temperatures to ensure the longevity and reliability of the wire.
    Thermal durability: The wire is exposed to high temperatures for extended periods of time to determine its thermal durability. For example, a Class 155 wire should maintain its performance after 20,000 hours of continuous exposure at 155°C with no significant degradation.
  2. Electrical properties
    Dielectric strength: This property measures the ability of the wire insulation to withstand electrical stress without breakdown. Standards typically require a dielectric strength of at least 4000 V/mm. High dielectric strength is critical to preventing electrical faults and ensuring safety in high-voltage applications.
    Insulation resistance: High insulation resistance is critical to preventing leakage currents that could cause short circuits or other failures. Standards specify a minimum value for insulation resistance, usually related to the cross-sectional area and length of the wire, to ensure reliable performance.
  3. Mechanical Properties
    Tensile Strength: The wire must have sufficient tensile strength to withstand the mechanical stresses during manufacturing, installation, and operation. For rectangular copper wire, a typical tensile strength requirement might be around 200 N/mm².
    Elongation: Adequate elongation is critical for flexibility and durability. Standards typically require an elongation of at least 15%, indicating that the wire will not break when stretched, which is important for handling and installation.
    Adhesion and Flexibility: The insulation must adhere well to the copper conductor and remain flexible enough to not crack when bent and wound. This ensures that the wire maintains its integrity during installation and use.
  4. Dimensions and Tolerances
    Rectangular Cross-Section Dimensions: Standards specify precise dimensions and tolerances for wire width and thickness. For example, a wire with a width of 4.00 mm might have a tolerance of ±0.05 mm, while a wire with a thickness of 2.00 mm might have a tolerance of ±0.03 mm. These precise measurements are critical to ensure compatibility and performance in electrical systems.
    Conductor edge radius: The edges of rectangular wires must be smooth and rounded to prevent damage to the insulation. A typical edge radius might be around 0.20 mm, ensuring that the wire has no sharp edges that could damage the insulation.
  5. Surface Quality and Coating
    Surface smoothness: The surface of the wire must be smooth and free of defects such as scratches that could compromise the performance of the insulation. A smooth surface also facilitates better winding and lamination of electrical components.
    Coating: For enameled wire, the coating must be uniform and free of pinholes. The thickness of the coating and its adhesion to the copper wire are critical to maintaining the integrity of the insulation and ensuring long-term performance.

Data Presentation
1.Thermal durability test

Temperature150°C
Test duration20,000 hours
Insulation breakdownNo significant degradation after the test duration.

2.Dielectric strength test

Number of samples10 samples
Applied voltage5000 V
Number of breakdowns 0, showing excellent dielectric strength.

3.Tensile strength and elongation tests

Tensile Strength220 N/mm²
Elongation32%
Number of Test Samples50
Qualified Rate100%

Impact on Manufacturers
Compliance with IEC 60317-0-4:2020 is critical for manufacturers to ensure that their products meet performance and safety requirements. Compliance with the standard means rigorous testing and quality control during the manufacturing process to ensure that the wire meets all specified performance requirements. The standard helps manufacturers:

1.Ensure product reliability: By meeting stringent thermal, electrical and mechanical requirements, manufacturers can ensure the reliability and durability of their winding wires in a variety of applications.
2.Improve market competitiveness: Compliance with international standards such as IEC 60317-0-4:2020 improves the market competitiveness of products and makes them more accessible to global markets.
3.Enhance customer confidence: Compliance with these standards builds customer trust and confidence in the products, ensuring high performance and safety.

The IEC 60317-0-4:2020 standard provides comprehensive guidelines for the manufacture of glass fiber wrapped, resin or varnish impregnated, bare copper or enameled rectangular copper wire. Compliance with these specifications is essential to ensure that the wire meets the necessary performance and safety standards in a variety of electrical applications. By adhering to this standard, manufacturers can produce high-quality, reliable and durable winding wire that meets international safety and performance benchmarks. Understanding and implementing the specifications of IEC 60317-0-4:2020 is an essential requirement for any manufacturer looking to produce top-quality magnet wire, thereby improving product quality and opening up new market opportunities.