IEC 60317-17:2010

Overview

IEC 60317-17:2010 is an international standard issued by the International Electrotechnical Commission (IEC) detailing the specifications for polyvinyl acetal enamelled rectangular copper wire, classified under thermal class 105. This standard specifically covers the requirements for enamelled rectangular copper winding wire with a sole coating based on polyvinyl acetal resin. The resin may be chemically modified provided it retains its original chemical identity and fulfills all wire requirements.

Designed primarily for electrical winding applications, this standard aims to ensure consistent quality, performance, and safety of class 105 enamelled winding wires. The "class 105" rating refers to a minimum temperature index of 105°C and a heat shock temperature of at least 155°C, indicating the wire's ability to withstand elevated operating temperatures.

The latest edition includes a key update referencing the transformer oil resistance test method specified in IEC 60851-4, ensuring compatibility with evolving testing protocols.

Key Topics

• Scope and Material: Specifies dimensions, mechanical and electrical properties of rectangular copper wires coated with polyvinyl acetal enamel for winding applications.
• Thermal Class: Rated for class 105, supporting operation at elevated temperatures up to 105°C temperature index and 155°C heat shock.
• Wire Dimensions: Widths range between 2.00 mm and 16.00 mm, and thicknesses between 0.80 mm and 5.60 mm, including wires of grade 1 and grade 2.
• Testing and Measurements:
  • Electrical resistance and elongation are defined according to IEC 60317-0-2.
  • Mechanical tests include flexibility (mandrel winding and stretching tests), springiness, and heat shock tolerance.
  • Chemical resistance tests focus on solvents and transformer oil, based on IEC 60851-4 methodologies.
  • Breakdown voltage tested at 105°C temperature.
• Inapplicable Tests: Some tests such as resistance to abrasion, cut-through, solderability, and pinhole tests are deemed inappropriate for this wire type.
• Packaging: Guidelines follow Clause 30 of IEC 60317-0-2 to ensure proper handling and protection during storage and transport.

Applications

IEC 60317-17 enamelled rectangular copper winding wires are widely used in electrical equipment that requires highly reliable and thermally stable winding wire. Common applications include:

• Transformers: For winding coils requiring resistance to thermal and environmental stress.
• Electric Motors: Insulated wire for stator and rotor windings subjected to mechanical and thermal loads.
• Inductors and Coils: Components where precise wire dimensions and electrical properties are critical.
• Electromechanical Devices: Where long-term durability and chemical resistance of the wire coatings are important.
• High-temperature Electrical Assemblies: Use in devices requiring insulation that withstands continuous elevated temperatures without degradation.

Related Standards

This standard is part of the IEC 60317 series covering specifications for particular types of winding wires, and references several key documents including:

• IEC 60317-0-2: General requirements for enamelled rectangular copper wire providing foundational test methods and dimensional criteria.
• IEC 60851-4: Methods of test for winding wires, specifically chemical properties and resistance to transformer oil.
• IEC 60264: Packaging standards for winding wires to ensure proper shipment and storage.

By adhering to IEC 60317-17:2010, manufacturers, designers, and engineers align with internationally recognized quality benchmarks, ensuring compatibility and safety in electrical winding applications using polyvinyl acetal enamelled rectangular copper wire class 105. This contributes to the reliability and longevity of electrical equipment operating in demanding thermal and chemical environments.