ASTM D295-12
Standard Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation

Standard No.

ASTM D295-12

Release Date

2012

Published By

American Society for Testing and Materials (ASTM)

Status

Withdraw 2009-10

Latest

ASTM D295-12

Scope

The thickness test is necessary to determine whether the material meets specified tolerances for thickness. In addition, thickness values are essential because of the importance of space factor in designing electrical equipment.

1.1 These test methods cover procedures for the testing of varnished cotton fabrics and varnished cotton fabric tapes (Note 1) to be used as electrical insulation and are directly applicable to both “straight-cut” and “bias-cut” materials, unless otherwise stated in the test method.

Note 18212;Methods of testing varnished glass fabrics and tapes are given in Test Methods D902.

1.2 The procedures appear in the following order:

Procedures	Sections	ASTM Test Methods
Breaking Strength	20 to 27	...
Conditioning Dielectric Breakdown Voltage	5 43 to 46	... D149
Dielectric Breakdown Voltage Under Elongation	47 to 53	D149
Dissipation Factor and Permittivity	54 to 60	D150
Elongation Resistance to Oil	35 to 42 68 to 73	... D92
Selection of Test Specimens	4	...
Tear Resistance	28 to 34	D689
Thickness	6 to 10	D374
Thread Count	15 to 19	...
Volume Resistance	61 to 67	D257
Weight	11 to 14	...

1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.

1.4 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 standar......

ASTM D295-12 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 D257 Standard Test Methods for DC Resistance or Conductance of Insulating Materials
• ASTM D374 Standard Test Methods for Thickness of Solid Electrical Insulation
• ASTM D689 Standard Test Method for Internal Tearing Resistance of Paper
• ASTM D902 Standard Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation
• ASTM D92 Standard Test Method for Flash and Fire Points by Cleveland Open Cup

ASTM D295-12 history

• 2012 ASTM D295-12 Standard Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation
• 1999 ASTM D295-99(2004) Standard Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation
• 1999 ASTM D295-99 Standard Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation