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GB/T 3655-2022 English PDF (GBT3655-2022)

GB/T 3655-2022 English PDF (GBT3655-2022)

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GB/T 3655-2022: Methods of measurement of the magnetic properties of electrical steelstrip and sheet by means of an epstein frame
This document specifies the general rules and technical details for measuring the magnetic properties of electrical steel strip (sheet) by means of an Epstein frame. This document is applicable to the measurement of AC magnetic properties and the measurement of DC magnetic properties of grain-oriented and non-grain-oriented electrical steel strips (sheets) with a frequency upper limit of 400 Hz. Epstein frames are suitable for measuring specimens made from various grades of electrical steel strips (sheets). The determination of the AC magnetic properties is carried out at a given peak value of magnetic polarization (or peak value of magnetic field strength) and a given frequency and sinusoidal induced voltage. The measurement is carried out at ambient temperature (23¡À5)¡ãC. The specimen is demagnetized before measurement. Measurements at higher frequencies shall be carried ou and quot;n accordance with the provisions of GB/T 10129. NOTE 1: It can refer to this document and use a suitable Epstein frame for testing at other ambient temperatures (such as 150¡ãC). Indicate the relevant temperature in the test report. NOTE 2: The and quot;agne

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