IEC 60317-93:2023

Overview

IEC 60317-93:2023 is an international standard developed by the International Electrotechnical Commission (IEC) that defines the requirements for a specific type of winding wire: enamelled rectangular copper wire of class 220, featuring a dual coating system. This standard covers wires coated first with polyester or polyesterimide resin, optionally modified for enhanced performance, and overcoated with polyamide-imide resin. These specifications are crucial for the consistent quality, performance, and reliability of winding wires used in electrical equipment.

The standard applies to wires with:

• Widths from 2.0 mm up to 25.0 mm
• Thicknesses from 0.80 mm up to 10.0 mm

Both grade 1 and grade 2 wires are included, as detailed in IEC 60317-0-2, which must be used in conjunction with IEC 60317-93:2023.

Key Topics

IEC 60317-93:2023 specifies the following key aspects for dual-coated rectangular copper winding wires:

• Materials and Coating:

  • Base layer of polyester or polyesterimide resin, which can be chemically modified if requirements are met
  • Superimposed layer of polyamide-imide resin

• Thermal Performance:

  • Class 220: Minimum temperature index of 220°C
  • Heat shock temperature not less than 240°C

• Dimensional Requirements:

  • Exact combinations and ratios of width and thickness must comply with IEC 60317-0-2

• Physical and Electrical Properties:

  • Requirements for electrical resistance, elongation, springiness, flexibility, and adherence
  • Specific methods of testing and appearance as referenced in the base standard (IEC 60317-0-2)

• Applicability:

  • Ensures the wire’s suitability for applications that require high thermal resistance and reliability

Applications

Enamelled rectangular copper winding wires meeting IEC 60317-93:2023 are widely used in:

• Transformers: Ensuring durable and high-performance windings for energy efficient operation and longevity.
• Motors and Generators: Where high-temperature endurance and electrical insulation are mission-critical.
• Electrical Reactors and Chokes: For precise inductance control and compact winding configurations.
• Other Electrical Equipment: Any application that demands a combination of mechanical strength, high-temperature performance, and reliable insulation.

These wires offer enhanced resistance to heat, abrasion, and chemicals, aligning with demanding operational environments in industrial, automotive, and power distribution sectors.

Related Standards

IEC 60317-93:2023 forms part of a comprehensive set of IEC standards for winding wires. Key related standards include:

• IEC 60317-0-2:2020 - General requirements for enamelled rectangular copper wire; must be used alongside IEC 60317-93.
• IEC 60317 Series - Specifications for various types of winding wires, addressing different materials and performance classes.
• IEC 60264 Series - Standards covering the packaging of winding wires for transportation and handling.
• IEC 60851 Series - Test methods for winding wires, ensuring uniform assessment for mechanical, electrical, and chemical properties.

These interconnected standards support manufacturers, quality assurance professionals, and electrical engineers in maintaining global conformity for winding wire products.

In summary, IEC 60317-93:2023 ensures consistency, high performance, and safety for polyester or polyesterimide overcoated with polyamide-imide enamelled rectangular copper wires, making it essential for applications requiring thermal class 220 reliability and optimal electrical insulation. Compliance with this standard guarantees compatibility in international markets and supports long-term performance in critical electrical devices.