EN 10280:2001+A1:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Verfahren zur Messung der magnetischen Eigenschaften von Elektroblech und -band mit Hilfe eines TafelmessgerätesMatériaux magnétiques - Méthodes de mesure des caractéristiques magnétiques des tôles et bandes magnétiques a l'aide de l'essai sur tôle uniqueMagnetic materials - Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet tester77.140.50SROL]GHONLFlat steel products and semi-products29.030Magnetni materialiMagnetic materialsICS:Ta slovenski standard je istoveten z:EN 10280:2001+A1:2007SIST EN 10280:2001+A1:2007en01-april-2007SIST EN 10280:2001+A1:2007SLOVENSKI
STANDARDSIST EN 10280:20011DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10280:2001+A1
January 2007 ICS 29.030 Supersedes EN 10280:2001English Version
Magnetic materials - Methods of measurement of the magnetic properties of electrical sheet and strip by means of a single sheet tester
Matériaux magnétiques - Méthodes de mesure des caractéristiques magnétiques des tôles et bandes magnétiques à l'aide de l'essai sur tôle unique
Magnetische Werkstoffe - Verfahren zur Messung der magnetischen Eigenschaften von Elektroblech und -band mit Hilfe eines Tafelmeßgerätes This European Standard was approved by CEN on 6 December 2000 and includes Amendment 1 approved by CEN on 2 December 2006.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10280:2001+A1:2007: ESIST EN 10280:2001+A1:2007

2 Contents Foreword.3 1 Scope.4 2 Normative references.4 3 General principles.5 3.1 Principle.5 3.2 Test apparatus.5 3.3 Air flux compensation.6 3.4 Test specimen.6 3.5 Power supply.7 4 Determination of the specific total loss.7 4.1 Principle of measurement.7 4.2 Apparatus.7 4.3 Measuring procedure.7 5 Determination of magnetic field strength, excitation current and specific apparent power.9 5.1 Principle of measurement.9 5.2 Apparatus.10 5.3 Measuring procedure.10 5.4 Determination of characteristics.11 5.5 Reproducibility.13 Annex A (normative)
Requirements concerning the manufacture of yokes.17 Annex B (informative)
Calibration of the test apparatus with respect to the Epstein frame.18 !!!!Annex C (informative) Epstein to SST relationship for grain-oriented sheet steel"""".19 Bibliography.23
4 1 Scope This European Standard defines the general principles of the measurement of the magnetic properties of electrical sheets and strips by means of a single sheet tester and gives the technical details of the measurement of specific total loss and of magnetic field strength, excitation current and specific apparent power. This European Standard is applicable at power frequencies to : a) grain oriented magnetic sheet and strip :  for the measurement between 1,0 T and 1,8 T of :  specific total loss ;  specific apparent power ;  r.m.s. value of the magnetic field strength ;  for the measurement up to peak values of magnetic field strength of 1 000 A/m of :  peak value of the magnetic polarization ;  peak value of the magnetic field strength ; b) non-oriented magnetic sheet and strip :  for the measurement between 0,8 T and 1,5 T of :  specific total loss ;  specific apparent power ;  r.m.s. value of excitation current ;  for the measurement up to peak values of magnetic field strength of 10 000 A/m of :  peak value of the magnetic polarization ;  peak value of the magnetic field strength. The single sheet tester is applicable to test specimens obtained from electrical sheets and strips of any quality. The magnetic characteristics are determined for a sinusoidal induced voltage, for specified peak values of magnetic polarization and for a specified frequency. The measurements are made at an ambient temperature of 23 °C ± 5 °C on test specimens which have first been demagnetized. NOTE Throughout this European Standard the quantity "magnetic polarization" is used as defined in!IEC 60050-221". 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). IEC 60404-13, Magnetic materials - Part 13 : Methods of measurement of density, resistivity and stacking factor of electrical steel sheet and strip. SIST EN 10280:2001+A1:2007

6 3.2.2 Windings The primary and secondary windings shall be at least 440 mm in length and shall be wound on a non-conducting, non-magnetic, rectangular former. The dimensions of the former shall be as follows :  length : 445 mm ± 2 mm ;  internal width : 510 mm ± 1 mm ;  internal height : 520mm− mm ;  height : ≤ 15 mm. The primary winding can be made up of :  either five or more coils having identical dimensions and the same number of turns connected in parallel and taking up the whole length (see figure 3). For example, with five coils, each coil can be made up of 400 turns of copper wire 1 mm in diameter, wound in five layers ;  or a single continuous and uniform winding taking up the whole length. For example this winding can be made up of 400 turns of copper wire 1 mm in diameter, wound in one or more layers. The number of turns on the secondary winding will depend on the characteristics of the measuring instruments. 3.3 Air flux compensation Compensation shall be made for the effect of air flux. This can be achieved, for example, by a mutual inductor. The primary winding of the mutual inductor is connected in series with the primary winding of the test apparatus, while the secondary winding of the mutual inductor is connected to the secondary winding of the test apparatus in series opposition. The adjustment of the value of the mutual inductance shall be made so that, when passing an alternating current through the primary windings in the absence of the specimen in the apparatus, the voltage measured between the non-common terminals of the secondary winding shall be no more than 0,1 % of the voltage appearing across the secondary winding of the test apparatus alone. Thus the average value of the rectified voltage induced in the combined secondary windings is proportional to the peak value of the magnetic polarization in the test specimen. 3.4 Test specimen The length of the test specimen shall be not less than 500 mm. Although the part of the specimen situated outside the pole
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