IEC 60317-48:2012

Overview

IEC 60317-48:2012 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies requirements for a particular type of winding wire used in electrical and electronic equipment. This standard covers glass-fibre wound resin or varnish impregnated, bare or enamelled round copper wire, with a temperature index of 155°C. The impregnating agents used are typically polyester or polyesterimide resin-based materials.

This standard outlines the technical and performance specifications necessary to ensure the quality, reliability, and safety of these specialized copper winding wires used in electrical windings, especially where enhanced heat resistance and mechanical stability are required. The 2012 edition represents a technical revision of the previous standard, introducing new clauses such as appearance requirements and the pin hole test.

Key Topics

• Glass-fibre Winding and Impregnation
  The copper wire is reinforced with a glass-fibre covering, which may be a single or double layer, coated with resin or varnish to enhance mechanical and thermal durability.

• Temperature Index 155
  Specifies the wire's ability to withstand continuous operation up to 155°C, important for maintaining performance in high-temperature environments.

• Bare or Enamelled Wire Grades
  The standard includes specifications for both bare copper wire as well as grade 1 or grade 2 enamelled round copper wire, accommodating different insulation and application needs.

• Testing and Compliance
  While many conventional tests such as heat shock, resistance to solvents, and solderability are deemed inappropriate for this type of wire, key tests such as electrical resistance, breakdown voltage, elongation, springiness, and the newly introduced pin hole test are specified to validate performance.

• General Notes and Appearance
  New subclauses provide guidelines on winding wire characteristics and visual appearance expectations, ensuring consistent quality and reliability.

• Reference to IEC 60317-0-6
  The standard is designed to be used alongside IEC 60317-0-6:2001, which outlines general requirements for glass-fibre wound resin or varnish impregnated round copper wire.

Applications

IEC 60317-48 compliant copper winding wire is essential in manufacturing electrical and electromechanical devices that require reliable insulation and mechanical support within windings. Typical applications include:

• Electric Motors and Generators
  Ensuring durability and thermal resistance of winding wires in high-performance motors operating at elevated temperatures.

• Transformers and Inductors
  Providing insulation integrity under thermal stress and mechanical forces during operation.

• Electrical Coils and Relays
  Maintaining coil performance and longevity through enhanced thermal and mechanical stability.

• High-Temperature Electronics
  Suitable for devices where continuous exposure to temperatures up to 155°C is expected.

The reinforcement by glass-fibre wrapping combined with specific resin impregnation makes this wire particularly suited for specialized electrical equipment where conventional insulation might fail.

Related Standards

IEC 60317-48 is part of the broader IEC 60317 series, which covers specifications for various types of winding wires. Related standards that complement or provide further context include:

• IEC 60317-0-6:2001
  General requirements for glass-fibre wound resin or varnish impregnated, bare or enamelled round copper wire.

• IEC 60317-3:2004
  Specifications for polyester enamelled round copper wire, class 155, applicable for wires with similar temperature ratings.

• IEC 60264 Series
  Guidelines regarding the packaging of winding wires to ensure protection and quality preservation during transport and storage.

• IEC 60851 Series
  Test methods for winding wires covering a range of mechanical, electrical, and thermal evaluations.

By complying with IEC 60317-48, manufacturers and users ensure that glass-fibre wound resin or varnish impregnated copper winding wires meet internationally recognized performance and quality standards, essential for safety and operational efficiency in advanced electrotechnical applications.

Keywords: IEC 60317-48, copper winding wire, glass-fibre wound wire, resin impregnated wire, enamelled copper wire, temperature index 155, winding wire specifications, electrical insulation wire, high temperature winding wire.