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ASTM D1932-03

Historical Revision

Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes

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1.1 This test method covers the determination of the relative thermal endurance of flexible electrical insulating varnishes by determining the time necessary at elevated temperatures to decrease the dielectric breakdown of the varnish to an arbitrarily selected value when applied to a standard glass fiber fabric.

1.2 This test method does not apply to varnishes that lose a high percentage of their dielectric breakdown voltage when flexed before elevated temperature exposure as prescribed in the screening test (Section 9). Examples of such varnishes are those used for high speed armatures and laminated structures. Also, this test method is not applicable to varnishes which distort sufficiently during thermal elevated temperature exposure so that they cannot be tested using the curved electrode assembly.

1.3 Thermal endurance is expressed in terms of a temperature index.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.

1.5 The values stated in SI units are the standard.

Note 1—There is no equivalent IEC or ISO standard.


SDO ASTM: ASTM International
Document Number D1932
Publication Date Oct. 1, 2003
Language en - English
Page Count 5
Revision Level 03
Supercedes
Committee D09.01
Publish Date Document Id Type View
Nov. 1, 2019 D1932-19 Revision
Nov. 1, 2018 D1932-18 Revision
April 1, 2013 D1932-13 Revision
March 1, 2004 D1932-04 Revision
Oct. 1, 2003 D1932-03 Revision
Sept. 10, 2001 D1932-97 Revision
Sept. 10, 2001 D1932-01 Revision
Oct. 1, 2009 D1932-04R09 Reaffirmation