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sklademVydáno: 2020-02-27
BS EN IEC 60404-13:2018 - TC
Tracked Changes. Magnetic materials Methods of measurement of resistivity, density and stacking factor of electrical steel strip and sheet
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Označení normy: | BS EN IEC 60404-13:2018 - TC |
Vydáno: | 2020-02-27 |
ISBN: | 978 0 539 11279 5 |
Status: | Tracked Changes |
DESCRIPTION
BS EN IEC 60404-13:2018 - TC
This standard BS EN IEC 60404-13:2018 - TC Tracked Changes. Magnetic materials is classified in these ICS categories:
- 29.030 Magnetic materials
- 17.220.20 Measurement of electrical and magnetic quantities
- 29.020 Electrical engineering in general
- 19.020 Test conditions and procedures in general
Since these properties are functions of temperature, the measurements will be made at an ambient temperature of (23 ±5) °C except when specified in this document.
This edition includes the following significant technical changes with respect to the previous edition:
- the sequence of the density and resistivity sections is changed and the title of the document revised to reflect this;
- the van-der-Pauw method (Method R2) is also applicable to Epstein strip specimens;
- the gas pyknometer method is introduced, and the liquid immersion method and the calculation method based on the chemical composition are quoted;
- the requirements of the stacking factor section, such as the tolerance of the dimensions of the test specimen and the repeatability of measurement, are changed;
- an example of the apparatus for determination of the resistivity using a rectangular sheet, which was previously part of the main body of the text, is moved to constitute informative Annex A;
- an example of the determination of the density by using the gas pyknometer method is added as an informative Annex B;
- an example of the determination of density based on the calculation of silicon and aluminium contents is added as an informative Annex C.