ASTM D1932-19
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes

Standard No.

ASTM D1932-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D1932-19

Scope

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 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. NOTE 1—There is no equivalent IEC or ISO standard. 1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D1932-19 Referenced Document

• ASTM D1346 Methods of Testing Electrical Insulating Varnishes for 180 C and Above
• ASTM D149 Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
• ASTM D1711 Standard Terminology Relating to Electrical Insulation
• ASTM D2307 Standard Test Method for Thermal Endurance of Film-Insulated Round Magnet Wire
• ASTM D2518 Standard Specification for Woven Glass Fabrics for Electrical Insulation
• ASTM D374/D374M Standard Test Methods for Thickness of Solid Electrical Insulation*， 2023-10-01 Update
• ASTM D5423 Standard Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation
• ASTM D580/D580M Standard Practice for Greige Woven Glass Tapes and Webbings
• ASTM D618 Standard Practice for Conditioning Plastics for Testing*， 2021-07-15 Update

ASTM D1932-19 history

• 2019 ASTM D1932-19 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
• 2018 ASTM D1932-18 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
• 2013 ASTM D1932-13 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
• 2004 ASTM D1932-04(2009) Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
• 2004 ASTM D1932-04 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
• 2003 ASTM D1932-03 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
• 2001 ASTM D1932-01 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
• 2001 ASTM D1932-97 Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes