ASTM-D295 2012

$44.96

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

Published By	Publication Date	Number of Pages
ASTM	2012	11

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Categories: 29.035.99 - Other insulating materials, ASTM

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Description

ASTM D295-12

Withdrawn Standard: Standard Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation (Withdrawn 2020)

ASTM D295

Scope

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 1—Methods of testing varnished glass fabrics and tapes are given in Test Methods D902.

1.2 The procedures appear in the following order:

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 standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see 44.4, 51.1, 58.1, and 65.1.

Note 2—This standard resembles IEC 60394–2 in title only. The content is significantly different.

^REFERENCE:

ASTM Standards:

D92 Test Method for Flash and Fire Points by Cleveland Open Cup Tester

D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation

D257 Test Methods for DC Resistance or Conductance of Insulating Materials

D374 Test Methods for Thickness of Solid Electrical Insulation

D689 Test Method for Internal Tearing Resistance of Paper (Withdrawn)

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

D1711 Terminology Relating to Electrical Insulation

IEC Standard:

IEC 60394–2 Varnished Fabrics for Electrical Purposes Part 2: Methods of Test

Keywords

breaking strength; dielectric breakdown voltage; dissipation factor; permittivity; tear resistance (internal); thread count; varnished cotton fabric; volume resistance

ICS Code

ICS Number Code 29.035.99 (Other insulating materials)

DOI: 10.1520/D0295-12

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Selection of Test Specimens Conditioning Significance and Use Test Specimens Procedure Report Precision and Bias Significance and Use Procedure
3	Report Precision and Bias Terminology Significance and Use Procedure Report Precision and Bias Significance and Use Apparatus Test Specimens Number of Specimens Conditioning Procedure Report
4	Precision and Bias Significance and Use Apparatus Test Specimens Conditioning Procedure Report Precision and Bias Significance and Use Apparatus Test Specimens Conditioning
5	Procedure Calculation Report Precision and Bias Significance and Use Short-Time, Step-by-Step, and Slow-Rate-of-Rise Tests FIG. 1
6	Long-Time Tests Precision and Bias Significance and Use
7	Apparatus Test Specimens Conditioning Procedure Report Precision and Bias Significance and Use Electrodes Test Specimens
8	Conditioning Procedure Report Precision and Bias Significance and Use Electrodes Test Specimens Conditioning Procedure
9	Report Precision and Bias Significance and Use Test Specimens Procedure Dielectric Breakdown Voltage Report Precision and Bias Keywords
10	X1. APPARATUS FOR MAKING DIELECTRIC BREAKDOWN VOLTAGE TESTS ON INSULATING TAPE X1.1 Single-Shot Tester X1.2 Multiple-Electrode Tester
11	FIG. X1.1

Additional information

Thickness	6 to 10
Selection of Test Specimens	4
Volume Resistance	61 to 67
Breaking Strength	20 to 27
Dielectric Breakdown Voltage Under Elongation	47 to 53
Tear Resistance	28 to 34
Procedures	Sections
Dissipation Factor and Permittivity	54 to 60
Conditioning Dielectric Breakdown Voltage	5 43 to 46
Thread Count	15 to 19
Weight	11 to 14
Elongation Resistance to Oil	35 to 42 68 to 73
ICS Codes	29.035.99 - Other insulating materials