ASTM D902-00 - 10.9.2000
 
1. Scope

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 1--Methods of testing varnished cloths and tapes are given in Methods D295.

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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 SectionASTM Test Method Reference
Breaking Strength22-28D828
Conditioning6-8...
Dielectric Breakdown Voltage and Di-electric Strength29-38D149, D295
Dissipation Factor and Relative Permittivity52-60D150, E104, D5032
Effect of Elevated Temperature39-45D1830
Resistance to Oil46-51D3487
Sampling3-5...
Thermal Endurance68 D1830
Thickness16-21D374
Thread Count12-15...
Weight 9-11...
Weight Loss at Elevated Temperature61-67 D5423

1.4 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.

1.5This 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. Specific warning statement are given in 35.1.1 and 58.1

 
2. Referenced Documents

D295-12

Standard Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation (Withdrawn 2020)

D828-22

Standard Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus

E104-20a

Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions (Includes all amendments and changes 12/21/2020).

IEEE No. 1

General Principles for Temperature Limits in the Rating of Electrical Equipment Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE), 445 Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331, http://www.ieee.org.

D149-25

Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

D150-22

Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation

D374-99

Standard Test Methods for Thickness of Solid Electrical Insulation

D1711-25a

Standard Terminology Relating to Electrical Insulation (Includes all amendments and changes 12/12/2025).

D1830-17(2024)

Standard Test Method for Thermal Endurance of Flexible Sheet Materials Used for Electrical Insulation by the Curved Electrode Method

D3487-25

Standard Specification for Mineral Insulating Liquid Used in Electrical Apparatus

D5032-19

Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions

D5423-23

Standard Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation