ASTM D115-07
(Test Method)Standard Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation
Standard Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation
SIGNIFICANCE AND USE
Control—The following tests are useful for control purposes during the manufacture and use of varnishes, and for determining the uniformity of batches:
4.1.1 Specific gravity,
4.1.2 Viscosity,
4.1.3 Flash point, and
4.1.4 Nonvolatile matter by weight.
Performance—The following tests are useful for determining the performance of varnishes during application and use:
4.2.1 Drainage,
4.2.2 Time of drying,
4.2.3 Build,
4.2.4 Dielectric strength,
4.2.5 Thermal endurance,
4.2.6 Varnish compatibility,
4.2.7 Salt water proofness, and
4.2.8 Oil resistance.
SCOPE
1.1 These test methods cover tests for solvent containing varnishes primarily intended to provide electrical, mechanical, and chemical protection for electrical equipment. These test methods include tests for control and performance as follows:
1.2 Where the entire test method is included in this standard, the precision and bias are not known unless given in the stated method.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 hazard statements, see Section 5.Note 1
There is no equivalent IEC standard.
General Information
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Standards Content (Sample)
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An American National Standard
Designation:D115–07
Standard Test Methods for Testing
1
Solvent Containing Varnishes Used for Electrical Insulation
This standard is issued under the fixed designation D115; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D93 Test Methods for Flash Point by Pensky-Martens
Closed Cup Tester
1.1 These test methods cover tests for solvent containing
D149 Test Method for Dielectric Breakdown Voltage and
varnishes primarily intended to provide electrical, mechanical,
Dielectric Strength of Solid Electrical Insulating Materials
and chemical protection for electrical equipment. These test
at Commercial Power Frequencies
methods include tests for control and performance as follows:
D202 Test Methods for Sampling and Testing Untreated
Procedure Section
Paper Used for Electrical Insulation
Build 37-41
Dielectric Strength 42-47
D287 Test Method forAPI Gravity of Crude Petroleum and
Drainage 25-31
Petroleum Products (Hydrometer Method)
Flash Point 17-19
D295 Test Methods for Varnished Cotton Fabrics Used for
Nonvolatile Matter 20-24
3
Oil Resistance 53-55
Electrical Insulation
Preparation of Test Specimens 7
D374 Test Methods for Thickness of Solid Electrical Insu-
Specific Gravity 9-12
Temperature Index 48-49 lation
Time of Drying 32-36
D580 Specification for Greige Woven Glass Tapes and
Varnish Compatibility 50-52
Webbings
Viscosity 13-16
D1475 Test Method For Density of Liquid Coatings, Inks,
1.2 Wheretheentiretestmethodisincludedinthisstandard,
and Related Products
the precision and bias are not known unless given in the stated
D1638 Method of Testing Urethane Foam Isocyanate Raw
method.
Materials
1.3 The values stated in SI units are to be regarded as the
D1932 Test Method for Thermal Endurance of Flexible
standard. The values given in parentheses are for information
Electrical Insulating Varnishes
only.
D2518 Specification for Woven Glass Fabrics for Electrical
1.4 This standard does not purport to address all of the
Insulation
safety concerns, if any, associated with its use. It is the
D2519 Test Method for Bond Strength of Electrical Insu-
responsibility of the user of this standard to establish appro-
lating Varnishes by the Helical Coil Test
priate safety and health practices and determine the applica-
D3145 Test Method for Thermal Endurance of Electrical
bility of regulatory limitations prior to use. For specific hazard
Insulating Varnishes by the Helical Coil Method
statements, see Section 5.
D3251 Test Method for Thermal Endurance Characteristics
of Electrical Insulating Varnishes Applied Over Film-
NOTE 1—There is no equivalent IEC standard.
Insulated Magnet Wire
2. Referenced Documents
D3278 Test Methods for Flash Point of Liquids by Small
2
2.1 ASTM Standards: Scale Closed-Cup Apparatus
D56 Test Method for Flash Point by Tag Closed Cup Tester D3487 Specification for Mineral Insulating Oil Used in
Electrical Apparatus
D5032 Practice for Maintaining Constant Relative Humid-
ity by Means of Aqueous Glycerin Solutions
1
These test methods are under the jurisdiction of ASTM Committee D09 on
D5423 Specification for Forced-Convection Laboratory
Electrical and Electronic Insulating Materials and are the direct responsibility of
Subcommittee D09.01 on Electrical Insulating Varnishes, Powders and Encapsulat- Ovens for Evaluation of Electrical Insulation
ing Compounds.
E104 Practice for Maintaining Constant Relative Humidity
Current edition approved May 1, 2007. Published June 2007. Originally
by Means of Aqueous Solutions
approved in 1941. Last previous edition approved in 2002 as D115 – 02. DOI:
10.1520/D0115-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Withdrawn. The last approved version of this historical standard is referenced
the ASTM website. on www.astm.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D115–07
3. Terminology 4.2 Performance—The following tests are useful for deter-
mining the performance of varnishes during application and
3.1 Definitions: Definitions:
use:
3.1.1 dielectric strength—the voltage gradient at which
4.2.1 Drainage,
dielectric failure of the insulating material occurs under spe-
4.2.2 Time of drying,
cific conditions of test.
4.2.3 Build,
3.1.2 drainage—of
...
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