Your shopping cart is empty!
ASTM International, 11/01/2019
Publisher: ASTM
File Format: PDF
$25.00$50.00
Published:01/11/2019
Pages:5
File Size:1 file , 120 KB
Note:This product is unavailable in Russia, Ukraine, Belarus
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.
Standard Practice for Encapsulation Testing of Friable Asbestos-Containing Surfacing Materials
$29.00 $58.00
Standard Specification for Cast Poly(Methyl Methacrylate) Plastic Rods, Tubes, and Shapes
$27.00 $54.00
Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
$26.00 $52.00
Standard Test Method for In-Plane Shear Properties of Polymer Matrix Composite Materials by the Rail Shear Method
$32.00 $65.00