IEC 60317-32:2015

Overview of IEC 60317-32:2015 Standard

The IEC 60317-32:2015 is an international standard issued by the International Electrotechnical Commission (IEC) specifying requirements for glass fibre wound, resin or varnish impregnated, bare or enamelled rectangular copper winding wire with a temperature index of 155. This standard defines the dimensions, material characteristics, and performance criteria essential for producing reliable winding wires used in electrical equipment.

This edition updates and replaces previous versions from 1990, 1997, and 2005, including significant technical revisions to reflect advances in manufacturing and testing. It applies specifically to copper wires with widths ranging from 2.0 mm to 16.0 mm and thicknesses from 0.80 mm to 5.60 mm. The construction features glass fibre winding for thermal stability and mechanical protection combined with resin or varnish impregnation.

IEC 60317-32 should be used in conjunction with IEC 60317-0-4:2015, which covers general requirements and testing methods for this type of winding wire.

Key Topics Covered

• Material Composition
  Rectangular copper conductors wound with glass fibre and impregnated with resin or varnish enhance thermal resistance and mechanical strength.

• Temperature Index 155
  Defines the wire's ability to operate reliably at temperatures up to 155°C, critical for applications requiring high thermal stability.

• Dimensional Specifications
  Standardized nominal conductor dimensions ensure uniformity; width ranges between 2.0 mm and 16.0 mm, thickness from 0.80 mm to 5.60 mm, with specified width/thickness ratios as per IEC 60317-0-4.

• Glass Fibre Covering Grades
  Multiple grades describe coverings over bare or grade 1 and grade 2 enamelled conductors:

  • GL1: One glass fibre covering
  • GL2: Two glass fibre coverings
  • Grade 1 and Grade 2 enamelled conductor options exist underneath fibre layers for tailored insulation properties.

• Test Methods and Limitations
  Many tests typically applied in winding wire standards-such as heat shock, cut-through, abrasion resistance, solvent resistance, and solderability-are marked as inappropriate for this specific wire type due to its construction. Conversely, electrical resistance, elongation, flexibility, breakdown voltage, and temperature index tests follow established methods in IEC 60317-0-4.

• Packaging Requirements
  Packaging protocols ensure protection and traceability, referenced to IEC 60317-0-4 standards.

Applications

IEC 60317-32:2015 wires are essential components in manufacturing:

• Electrical Transformers
  Providing thermal stability and mechanical durability for transformer windings operating at elevated temperatures.

• High-Performance Electrical Motors
  Enabling reliable insulation and winding integrity where rectangular conductors are preferred for efficient slot fill and heat dissipation.

• Industrial and Power Equipment
  Used in electromechanical assemblies demanding long-term reliability in thermally demanding environments.

• Impedance Coils and Inductors
  Where precise wire shape and thermal ratings benefit performance in inductive components.

These wires ensure enhanced operational life and performance due to their robust impregnation and glass fibre reinforcement, meeting international quality and safety benchmarks.

Related Standards

• IEC 60317-0-4:2015 – General requirements and test methods for glass fibre wound, resin or varnish impregnated rectangular copper wire. This standard is normative and must be read alongside IEC 60317-32.

• IEC 60317 Series – Specifications for various particular types of winding wires covering insulation systems, conductor shapes, and impregnations.

• IEC 60851 Series – Test methods specifically developed for evaluating winding wires across different grades and constructions.

• IEC 60264 Series – Packaging standards ensuring secure handling and storage of winding wires.

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IEC 60317-32:2015 provides comprehensive guidelines and normative criteria critical for manufacturers and users of high-quality rectangular copper winding wires with glass fibre impregnation. Adherence ensures reliable, thermally resilient windings for advanced electrical applications worldwide.