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ČSN EN IEC 60404-12 (345884)

Magnetic materials - Part 12: Methods of test for the assessment of the thermal endurance of surface insulation coatings on electrical steel strip and sheet

STANDARD published on 1.9.2023

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The information about the standard:

Designation standards: ČSN EN IEC 60404-12
Classification mark: 345884
Catalog number: 517408
Publication date standards: 1.9.2023
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

Annotation of standard text ČSN EN IEC 60404-12 (345884):

This part of IEC 60404 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 document is applicable to the following properties of surface insulation coatings:
- adhesion;
- surface insulation resistance;
- stacking factor.
This document is not applicable to other properties of surface insulation coatings, e.g. welding properties, or to other effects, e.g. discoloration and off-gassing, which can be caused by exposure to elevated temperatures.
NOTE - Some of the tests take a very long time to perform and therefore they are often not appropriate for acceptance tests of material supplied on a specific order