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Astm standards free download rar11/27/2023 However, this test method is suitable for use at any frequency from 25 to 800 Hz. Free Download ASTM D149 - 09(2013) Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequenciesġ.1 This test method covers procedures for the determination of dielectric strength of solid insulating materials at commercial power frequencies, under specified conditions.2,3ġ.2 Unless otherwise specified, the tests shall be made at 60 Hz.
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