IEC 60851-1-2021 pdf Winding wires – Test methods – Part 1: General

3.1.1 bonding layer material which is deposited on an enamelled wire and which has the specific function of bonding wires together 3.1.2 bunched wire winding wire consisting of a quantity of small diameter insulated wires laid-up together without predetermined geometrical position and with or without additional covering 3.1.3 class thermal performance of a wire expressed by the temperature index and the heat shock temperature 3.1.4 coating material which is deposited on a conductor or wire by suitable means and then dried and/or cured 3.1.5 conductor bare metal after removal of the insulation 3.1.6 covering material which is wound, wrapped or braided around a bare or insulated conductor 3.1.7 crack opening in the insulation which exposes the conductor to view at the stated magnification 3.1.8 cure process of converting a reactive compound into a stable, usable condition by polymerization (polycondensation and polyaddition) and/or crosslinking [SOURCE: IEC 60050-212:2010, 212-13-07, modified – At the beginning of the definition, “convert a reactive compound” has been replaced by “process of converting a reactive compound” to define the term as a process.]
3.2 General notes on methods of test Unless otherwise specified, all tests shall be carried out at a temperature from 15 °C to 40 °C and a relative humidity of 25 % to 75 %. Before measurements are made, the specimens shall be preconditioned under these atmospheric conditions for a time sufficient to allow the wire to reach stability. The wire to be tested shall be removed from the packaging in such a way that the wire will not be subjected to tension or to unnecessary bends. Before each test, sufficient wire shall be discarded to ensure that any damaged wire is not included in the test specimens. Normally, all mandatory requirements for a method of test are given in the description, and diagrams are intended only to illustrate one possible arrangement for conducting the test. In case of inconsistencies between the IEC 60317 specification sheet and this document, the specification sheet shall prevail. When the test is restricted only to certain types of winding wires, this is specified with the test. Those tests of IEC 60851-2, IEC 60851-3, IEC 60851-4, IEC 60851-5 and IEC 60851-6 which in Annex A are marked with an asterisk are periodic conformance tests. These tests are carried out at a frequency agreed upon request of the end user. The test numbers used in IEC 60851-2, IEC 60851-3, IEC 60851-4, IEC 60851-5 and IEC 60851-6 correspond with the clause numbers in the IEC 60317 series.