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DIN EN IEC 60404-12:2021 Edition

DIN EN IEC 60404-12:2021 Edition

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

Published By Publication Date Number of Pages
DIN 2021-07 25
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This part of IEC 60404 is applicable to surface insulation coatings on electrical steel strip and sheet classified in IEC 60404-1-1. The object of this standard is to define the general principles and technical details of the test for the assessment of 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 800 °C and a specified duration time up to 2500 h. The specified property is measured at an ambient temperature of (23 ± 5) °C both before and after the 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 like e. g. discoloration and off-gassing, which can be caused by exposure to elevated temperatures. The testing can often take a very long time to perform and the methods can therefor be less suitable for acceptance testing of material supplied on a specific order.

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DIN EN IEC 60404-12
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