IEC 60851-2:1997 pdf download – Winding wires -Test methods -Part 2: Determination of dimensions

IEC 60851-2:1997 pdf download – Winding wires -Test methods -Part 2: Determination of dimensions.
This part of IEC 60851 specifies the following method of lest;
— Test 4: Dimensions.
For definitions, general notes on methods of test arid the complete series of melhods 01 test for
winding wires see IEC 60851.1.
2 NormatIve references
The following normative documents contain provisions which, through reference in this text. constitute provisions of this part of IEC 60851. At the time of publication, the editions indicated were valid, All normative documents are subject to revision, and parties to agreements based on this part of IEC 60851 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of the IEC and ISO maintain registers of currently valid International Standards.
IEC 60851-1:1996, Wir7dfng w.res — Test method5 – Pail 1: General
IEC 60851-5:1996, Winding wires — Tesi methods — Pail 5: Electrical properties
3 Test 4: Dimensions
3.1 Equipment
3.1.1 Round and rectangular wire
The equipment used shall have a xecision better than 2 m. If a micrometer, which contacts the wire, is used, it shall be ensured that the measunng torte Is in the range as given In table 1. The diameter range of the spindle and the anvil Is also given wi table 1.
3.2.1.2 Rectangular wire
The insulation shall be removed at the three places used for measurements in 3.2.5.2 by any method thai does not damage the conductor, At each place one measurement of the Iwo dimensions of the conductor shall be made.
The three single values shall be reported for each dimension of the conductor. The mean represents the conductor width or the conductor thickness respectively.
3.2.2 Out-of -roundness of the conductor
Out-ot.roundness is the maximum value of the difference between any two readings of the conductor diameter at each cross-section. The measurement shall be made in accordance with 3.2.1.1.
The out-of-roundness shall be reported.
3.2.3 Rounding of corners of rectangular wire
For the purpose of this test, a cross-section of the wire shall be prepared and then examined under a sutflenl magnitlcation
Three straight pieces of wire shall be cast In a suitable resinous compound, that will not affect the insulation. After cuflng. the colour of the resinous compound shall contrast with the colour of the insulation.
The specimen consisting of the three pieces of wire embended wi the cured resinous corround shall be cut at tight angles to the length of the wire pieces and the cross-section shall be carefully ground and polished by suitable means. The polished surface shall be examined under a rnagnEfication which allows a correct judgernent of the rounding of corners.
It shall be reported how the arc merges into the flat surface of the conductor. Any sharp, rough and projecting edges shall also be reported.
3.2.4 Increase in dimension due to the insulation
The increase in dimension due to the insulation is the difference between the overall cmension and the conductor dimension.
3.2.4.1 Round wire
The measurement shall be made In accordance with 3.2.1.1 and 3.2.5.1. The difference between the overall diameter and the conductor diameter shall be reported as increase in diameter
3.2.42 Rectangular wire
The measurement shall be made in accordance with 3.2.1.2 and 32.5.2. The difference between the overall width and the conductor width shall be reported as die increase in width. The ckllerence between the overall thickness and the conductor thickness shall be reported as increase in thãckness.