Overview
IEC 60317-61:2012 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for a particular type of winding wire used in electrical equipment. This standard covers polyester glass fibre wound, resin or varnish impregnated, bare or enamelled rectangular copper winding wire with a temperature index of 180 (minimum class 180). The wire is designed specifically for applications where high thermal resistance and mechanical strength are required.
The standard applies to copper winding wires with nominal conductor dimensions within:
- Width: 2.0 mm to 16.0 mm
- Thickness: 0.80 mm to 5.60 mm
IEC 60317-61:2012 should be read in conjunction with IEC 60317-0-8:2012, which defines general requirements for polyester glass fibre wound rectangular copper wires.
Key Topics
-
Wire Composition
The winding wire comprises a copper conductor with a rectangular cross-section, wound with polyester glass fibre and impregnated with resin or varnish. The impregnating agent has a temperature index of 180 and importantly does not contain silicone, ensuring stable thermal performance.
-
Temperature Index and Class
The temperature index for the wire is 180, indicating its capability to endure continuous operation at elevated temperatures up to this rating without insulation breakdown. However, tests such as heat shock, cut-through, and resistance to solvents are deemed inappropriate due to fiber construction and are excluded from this standard.
-
Grades and Coverings
Several grades are defined based on the type and number of polyester glass fibre coverings combined with specific enamel grades on the copper conductor:
- PG1: Single polyester glass fibre covering on bare conductor
- PG2: Double polyester glass fibre covering on bare conductor
- Grade 1 PG1 or PG2: One or two polyester glass fibre coverings over grade 1 enamelled conductor
- Grade 2 PG1 or PG2: One or two polyester glass fibre coverings over grade 2 enamelled conductor
-
Mechanical and Electrical Requirements
Properties such as electrical resistance, elongation, springiness, flexibility, adherence, breakdown voltage, and temperature index follow test methods and specifications detailed in IEC 60317-0-8:2012, ensuring consistency with general winding wire standards.
-
Exclusions of Tests
Certain tests common to other winding wire types (e.g., heat shock, solvent resistance, solderability, dielectric dissipation factor) are not applicable for this fiber wound wire, as indicated by the standard.
Applications
IEC 60317-61 winding wires are particularly suitable for use in electrical equipment where:
- High thermal endurance is necessary (temperature index 180)
- Mechanical reinforcement of the wire insulation via glass fibre is required
- Rectangular copper conductors are preferred to maximize space utilization and improve winding density
- Varnish or resin impregnation enhances mechanical properties and thermal stability
- Equipment operating under demanding environmental and mechanical conditions, such as transformers, motors, and generators, benefit from these specifications to ensure safety, reliability, and efficiency
The wire's combination of polyester glass fibre reinforcement and precise dimensional control makes it an excellent choice for high-performance electrical machines subjected to elevated temperature conditions.
Related Standards
-
IEC 60317 Series
IEC 60317-61 forms part of a broader series specifying particular types of winding wires. Relevant parts include IEC 60317-0-8:2012, which details general requirements specifically for polyester glass fibre wound rectangular copper wires.
-
IEC 60851 Series
Covers test methods for winding wires and helps define how to assess mechanical, electrical, and thermal properties consistently.
-
IEC 60264
Addresses packaging standards for winding wires, which supplement the technical and physical specifications given in IEC 60317.
Keywords: IEC 60317-61, polyester glass fibre winding wire, rectangular copper wire, copper winding wire, temperature index 180, resin impregnated wire, enamelled winding wire, electrical winding wire standards, high temperature winding wire, reinforced winding wire