IEC 60317-60-2:2020

Overview

IEC 60317-60-2:2020 is an international standard from the International Electrotechnical Commission (IEC) specifying the requirements for polyester glass-fibre wound, resin or varnish impregnated, bare or enamelled rectangular copper winding wires with a temperature index of 155. The standard covers wires used primarily in the winding of electrical equipment, where enhanced thermal and mechanical stability is needed.

The standard applies to wires with:

• Width: 2.0 mm to 16.0 mm
• Thickness: 0.80 mm to 5.60 mm

The insulating layer is composed of continuous-filament electrical-grade glass yarn combined with a high-grade polyester fibre, all impregnated with an agent such as epoxy, polyester, or polyesterimide resin. The document supersedes earlier editions, aligning with the latest requirements for winding wires.

Key Topics

Material Composition

• Rectangular copper conductor, either bare or enamelled (grade 1 or grade 2)
• Exterior covering of polyester glass-fibre for additional insulation and mechanical strength
• Impregnating agents (e.g., epoxy, polyester, or polyesterimide based resin) to enhance durability and temperature resistance

Temperature Performance

• Designed for applications requiring a temperature index of 155
• The temperature index depends on the combination of conductor, covering, and impregnating agent
• Not suitable for heat shock testing due to the unique structure and composition

Grades and Construction

• Various constructions based on combinations of fibre layers and enamel grades, including:
  • PG1: 1 layer
  • PG2: 2 layers
  • Enamel grades 1 and 2 with varying fibre layer combinations

Dimensional Consistency

• Strict requirements for the width and thickness ratios, as per IEC 60317-0-8

Testing and Quality Criteria

• Adopts general electrical and physical property tests from IEC 60317-0-8
• Requirements related to elongation, springiness, flexibility, breakdown voltage, and packaging are referenced

Limitations

• Certain tests (heat shock, abrasion, solvent resistance, etc.) are deemed unsuitable due to the construction

Applications

Polyester glass-fibre wound, resin or varnish impregnated rectangular copper wires covered by IEC 60317-60-2:2020 are used in:

• Transformers, particularly those requiring high mechanical reinforcement and thermal endurance
• Motors, especially in high-temperature environments or heavy-duty cycles
• Power inductors and reactors
• Specialized electrical equipment where improved insulation reliability and shape stability are critical

Their robust design makes them ideal for environments with significant thermal, electrical, and mechanical stress, improving the longevity and safety of electrical windings.

Related Standards

The IEC 60317-60-2:2020 standard forms part of a broader series for winding wires and should be considered alongside related documents for comprehensive compliance in manufacturing and quality assurance:

• IEC 60317-0-8: General requirements for glass-fibre wound and impregnated wires
• IEC 60851 series: Methods for testing winding wires
• IEC 60264 series: Packaging of winding wires
• IEC 60317 series (all parts): Other specifications for various winding wire constructions

Adhering to these interconnected standards ensures product consistency, safety, and performance in electrical engineering applications.

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Keywords: IEC 60317-60-2, winding wires, polyester glass-fibre, resin impregnated copper wire, rectangular copper wire, temperature index 155, electrical insulation standards, transformer wire, IEC standards, enamelled wire.