IEC TR 62981:2017

Studies and comparisons of magnetic measurements on grain-oriented electrical steelsheet determined by the single sheet test method and Epstein test method

IEC TR 62981:2017(E), which is a Technical Report, provides the results of international exercises and comparisons focusing on achieving the knowledge of the statistical performance of single sheet tester (SST) measurements made on grain-oriented electrical steel. These experiments aim at specifying obligatory reference values, measured by the single sheet test method, for the grading of high permeability (P grades) grain-oriented (g.-o.) materials, independently from the Epstein classification as it is practiced today. Besides this, Epstein test measurements have been made in order to gain more up-to-date statistical performance for comparison with the SST statistical characteristics. A few experiments were carried out aiming at improved knowledge on the systematic error performance of the SST, i.e. they were to determine the correlation between the quality of insulation separating laminations in the SST yokes and the measured loss.

General Information

• Status: Published
• Publication Date: 21-May-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.030 - Magnetic materials
• Technical Committee: TC 68 - Magnetic alloys and steels
• Drafting Committee: JWG 1 - TC 68/JWG 1
• Current Stage: PPUB - Publication issued
• Start Date: 07-Jun-2017
• Completion Date: 22-May-2017

Standards Content (Sample)

IEC TR 62981
®

Edition 1.0 2017-05
TECHNICAL
REPORT

colour
inside


Studies and comparisons of magnetic measurements on grain-oriented
electrical steelsheet determined by the single sheet test method and Epstein
test method
IEC TR 62981:2017-05(en)

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IEC TR 62981

®


Edition 1.0 2017-05




TECHNICAL



REPORT








colour

inside










Studies and comparisons of magnetic measurements on grain-oriented

electrical steelsheet determined by the single sheet test method and Epstein

test method


























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 29.030 ISBN 978-2-8322-4332-9



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® Registered trademark of the International Electrotechnical Commission

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– 2 – IEC TR 62981:2017 © IEC 2017
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Background . 7
4.1 Historical background and former concepts of the SST-Epstein relationship . 7
4.2 Establishing reference values for grain-oriented electrical steels determined
by independent SSTs – A new approach to the purpose . 8
5 Preliminary comparisons and experiments . 9
5.1 General .
...