EN 60851-2:2009/A2:2019

Overview

EN 60851-2:2009/A2:2019 is a CENELEC-endorsed amendment to IEC 60851-2:2009 covering test methods for the determination of dimensions of winding wires. This amendment clarifies measurement procedures for enamelled and bonded wires and has been approved for implementation across CENELEC member bodies. The standard supports consistent dimensional assessment as part of manufacturer quality control and regulatory compliance.

Keywords: winding wires, test methods, determination of dimensions, bonding layer, enamelled rectangular wire, IEC, CENELEC, measurement, quality control

Key Topics

• Scope and status: Amendment A2 updates EN/IEC 60851-2 with specific provisions that complement the existing Part 2 text. The amendment was approved by CENELEC in July 2019 and is available in the official languages.

• Measurement principles: The standard sets out procedures for measuring the overall width and overall thickness of winding wires. Measurements follow the methods already defined in the base document and are intended to be repeatable and comparable across laboratories and production sites.

• Bonding-layer increase: A new subclause specifies how to determine the increase in dimensions due to the bonding layer of enamelled rectangular wire. The method is:

  • Measure the overall width or thickness according to the referenced measurement clause.
  • Remove the bonding layer using a solvent, suitable agent, or other method that does not damage the underlying coating.
  • Repeat the measurement and report the difference of the two mean values as the increase in dimension due to the bonding layer.

• Language and endorsement: The amendment exists in English, French and German and is endorsed for national adoption by CENELEC members without modification.

Applications

This amendment and Part 2 are directly applicable to:

• Manufacturer quality control programs for enamelled and rectangular winding wires.
• Incoming inspection and supplier verification of wire dimensions.
• Production engineering where accurate conductor dimensions affect winding performance and coil assembly.
• Test laboratories performing compliance testing for IEC/CENELEC conformity.

Benefits include improved measurement consistency, clearer handling of bonding-layer effects on nominal dimensions, and stronger traceability of dimensional data used in product acceptance.

Related Standards

• IEC 60851-2 (base publication) - Winding wires: test methods, Part 2: Determination of dimensions.
• Other parts of IEC 60851 series covering electrical, thermal and mechanical tests for winding wires (refer to IEC/TC 55 catalogues for complete list).

For procurement, testing and compliance teams, EN 60851-2:2009/A2:2019 provides a practical, standardized approach to dimension measurement and reporting, reducing ambiguity around bonding-layer effects and enabling harmonized QC across CENELEC markets.