ASTM D902-12
Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation

Standard No.
ASTM D902-12
Release Date
2012
Published By
American Society for Testing and Materials (ASTM)
Latest
ASTM D902-12
Scope

The electrical properties of resin-coated glass fabrics are affected by their temperature and moisture content. For this reason it is necessary to control these properties for a specified time immediately prior to testing in order to attain reasonably good reproducibility of test values. The time of exposure to the conditioning atmosphere must be long enough to permit the test specimen to reach a relatively stable value. Usually the moisture content of these materials has little effect on the mechanical properties.

1.1 These test methods cover procedures for the testing of resin-coated glass fabrics and glass fabric tapes (Note 1) to be used as electrical insulation.

Note 18212;Methods of testing varnished cloths and tapes are given in Methods D295.

1.2 The warp threads in fabrics are the threads that are parallel with the length dimension as manufactured.

1.3 The procedures appear as follows:


Procedure
Section		ASTM Test
Method Reference
Breaking Strength22-28D828
Conditioning 6-8...
Dielectric Breakdown Voltage and Di-
electric Strength		29-38D149, D295
Dissipation Factor and Relative Permit-
tivity		52-60D150, E104, D5032
Effect of Elevated Temperature39-45D1830
Resistance to Oil46-51D3487
Sampling 3-5...
Thermal Endurance68 D1830
Thickness16-21D374
Thread Count12-15...
Weight 9-11...
Weight Loss at Elevated Temperature

ASTM D902-12 Referenced Document

  • ASTM D149 Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
  • ASTM D150 Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
  • ASTM D1711 Standard Terminology Relating to Electrical Insulation
  • ASTM D1830 Standard Test Method for Thermal Endurance of Flexible Sheet Materials Used for Electrical Insulation by the Curved Electrode Method
  • ASTM D295 Standard Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation
  • ASTM D3487 Standard Specification for Mineral Insulating Oil Used in Electrical Apparatus
  • ASTM D374 Standard Test Methods for Thickness of Solid Electrical Insulation
  • ASTM D5032 Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions
  • ASTM D5423 Standard Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation
  • ASTM D828 Standard Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus
  • ASTM E104 Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions

ASTM D902-12 history

  • 2012 ASTM D902-12 Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation
  • 2006 ASTM D902-06 Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation
  • 2000 ASTM D902-00 Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation
Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation


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