BS PD IEC/TR 62981:2017

BS PD IEC/TR 62981:2017, which is a Technical Report, provides the results of international exercisesand comparisons focusing on achieving the knowledge of the statistical performance of singlesheet tester (SST) measurements made on grain-oriented electrical steel. These experimentsaim at specifying obligatory reference values, measured by the single sheet test method, forthe grading of high permeability (P grades) grain-oriented (g.-o.) materials, independentlyfrom the Epstein classification as it is practiced today. Besides this, Epstein testmeasurements have been made in order to gain more up-to-date statistical performance forcomparison with the SST statistical characteristics. A few experiments were carried outaiming at improved knowledge on the systematic error performance of the SST, i.e. they wereto determine the correlation between the quality of insulation separating laminations in theSST yokes and the measured loss.Cross References:IEC 60050-221:1990/AMD3:2007IEC 60050-121:1998IEC 60404-2:1996/AMD1:2008IEC 60404-3:1992/AMD1:2002IEC 60404-3:1992 Cons Ed 2-2IEC 60404-3:1992/AMD2:2009IEC 60404-2:1996 Cons Ed 3-1