What is PD IEC/TR 62981- Single sheet test method and Epstein test method about?
PD IEC/TR 62981 is a technical report that 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.
Who is PD IEC/TR 62981 - Single sheet test method and Epstein test method for?
PD IEC/TR 62981 on the magnetic measurements is relevant to:
- Steel industry
- Mechanical industry
- Regulatory bodies
- Technical experts and consultants
- Certification and testing bodies
- R&D authorities
Why should you use PD IEC/TR 62981 - Single sheet test method and Epstein test method?
PD IEC/TR 62981 describes the Epstein method, and the single sheet tester (SST) method that are the two standardized methods for measuring the magnetic properties of electrical steel.
The magnetic characteristics of electrical steel are significant in two regards. Firstly, they are decisive for the possible applications of the material. Secondly, the magnetic loss performance is essential for the material grading and for the efficiency of the energy transformation, i.e. for the energy costs and the economic and environmental aspects.
The Epstein method has been in use continuously, from its beginning to the present time, defined as the only reference method determining the quality reference in the specification standard. 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.
The comparison of both these tests can help beneficial for industry experts and technology research professionals from the point of view of product development.