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ASTM International - ASTM D1932-13

Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes

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Organization: ASTM International
Publication Date: 1 April 2013
Status: inactive
Page Count: 5
ICS Code (Varnished fabrics): 29.035.60
significance And Use:

5.1 A major factor affecting the long term performance of insulating materials is thermal degradation. It is possible that factors, such as moisture and vibration, will cause failures after the... View More

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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.

Document History

November 1, 2019
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
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...
November 1, 2018
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
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...
ASTM D1932-13
April 1, 2013
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
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...
October 1, 2009
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
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...
March 1, 2004
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
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...
October 1, 2003
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
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...
September 10, 2001
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
1.1 This test method covers the determination of the relative thermal endurance of flexible electrical insulating varnishes by determining the aging time necessary at elevated temperatures to...
September 10, 2001
Standard Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
1.1 This test method covers the determination of the relative thermal endurance of flexible electrical insulating varnishes by determining the aging time necessary at elevated temperatures to...
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