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  • BSI
    BS EN IEC 60404-12:2023 Magnetic materials - Methods of test for the assessment of the thermal endurance of surface insulation coatings on electrical steel strip and sheet
    Edition: 2023
    $316.70
    / user per year

Description of BS EN IEC 60404-12:2023 2023

IEC 60404-12:2023 is applicable to surface insulation coatings on electrical steel strip and sheet classified in IEC 60404-1-1. This document defines the general principles and technical details of the tests for the assessment of the thermal endurance of surface insulation coatings on electrical steel strip and sheet. The assessment is made by evaluating the change of a specified property of the surface insulation coating due to a heat treatment at a specified temperature up to 850 °C for a specified duration time up to 2 500 h. The specified property is measured at an ambient temperature of (23 ± 5) °C both without heat treatment and after heat treatment. This edition includes the following significant technical changes with respect to the previous edition:
  1. the method of test for adhesion has been modified to match to the method of bend test specified in ISO 1519 using a cylindrical mandrel of 32 mm in diameter instead of the 30 mm diameter mandrel specified in the first edition;
  2. the method of test for interlaminar insulation resistance has been modified to match to the method specified in IEC 60404-11 and the modified Franklin test has been removed;
  3. the method of test for compressibility has been modified to match to the method of test for stacking factor specified in IEC 60404-13;
  4. the concept of "resistance grades" has been removed;
  5. the clamping pressure to be used at temperature ratings above 500 °C has been reduced to (0,01 ± 0,001) N/mm2;
  6. the testing for continuous exposure has been made a subject to an agreement between the manufacturer and the purchaser and the procedure has been moved to an informative Annex A.


Standard NumberBS EN IEC 60404-12:2023
TitleMagnetic materials - Methods of test for the assessment of the thermal endurance of surface insulation coatings on electrical steel strip and sheet
StatusDefinitive
Publication Date2023-04-03
ReplacesBS 6404-12:1993
Identical National Standard OfEN 60404-12 Ed.2.0, IEC 60404-12 Ed.2.0, EN IEC 60404-12:2023
DescriptorsMagnetic materials, Testing methods, Thermal endurance tests, Endurance testing, Surfaces, Insulation (electrical), Steels
ICS29.030 Magnetic materials, 17.220.01 Electricity. Magnetism. General aspects
CommitteeISE/108
ISBN978 0 539 06729 3
PublisherBSI
Pages20

The following editions for this book are also available...

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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