IEC 60851-1:2021

Overview

IEC 60851-1:2021 (consolidated with Amendment 1, 2025) - Part 1: General - is the foundational document of the IEC 60851 series on winding wires – test methods. It specifies general notes on methods of test for winding wires, provides the standardized terms and definitions used across the IEC 60851 series, and gives a survey of the test content covered in IEC 60851-2 to IEC 60851-6 (Annex A). This third edition updates normative references, clarifies atmospheric conditions for testing, and adds guidance on test frequency and test management.

Key Topics and Requirements

• Scope and purpose: Defines the general framework for winding wire testing and standardizes terminology for all subsequent parts of IEC 60851.
• Terms & definitions: Authoritative definitions for key concepts such as bonding layer, bunched wire, class, coating, conductor, enamelled wire, insulation, grade, and zero‑defect wire - essential for consistent winding wire testing and specification.
• General test conditions:
  • Standard atmospheric conditions for tests: 15 °C to 40 °C and 25 % to 75 % relative humidity.
  • Specimens must be preconditioned to reach stability before measurements.
  • Handling guidance: remove wire from packaging without introducing tension or bends and discard damaged end lengths before testing.
• Test management:
  • Periodic conformance tests (marked with an asterisk in Annex A) are performed at frequencies agreed between supplier and end user.
  • IEC standards do not prescribe certification management (routine vs non‑routine tests); these are contractual or national matters.
• Traceability & references:
  • Test numbering in IEC 60851 parts corresponds to clause numbers in the IEC 60317 specification sheets.
  • In case of inconsistency, the IEC 60317 specification sheet takes precedence.

Practical Applications and Users

IEC 60851-1 is used by:

• Manufacturers of insulated winding wires for establishing test procedures and quality control.
• Component and equipment designers (motors, transformers, inductors) specifying wire properties for reliable performance.
• Independent test laboratories and QA teams implementing standard test environments and specimen handling.
• Procurement and compliance teams negotiating conformance test frequency and supplier-customer test management. Note: certification bodies and national authorities may impose additional rules for test management beyond this standard.

Related Standards

• IEC 60851 series (Parts 2–6): detailed tests for dimensions, mechanical, chemical, electrical and thermal properties.
• IEC 60317 series: specification sheets for particular types of winding wires (takes precedence where applicable).
• IEC 60264 series: packaging of winding wires.
• IEC Electropedia and ISO/IEC directives for terminology and standardization practices.

Keywords: IEC 60851-1, winding wires, test methods, winding wire testing, insulated wires, IEC 60851 series, IEC 60317.