ASTM D115-14
(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
4.1 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.
4.2 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:
Procedure
Section
Build
38 – 42
Dielectric Strength
43 – 48
Drainage
26 – 32
Flash Point
18 – 20
Nonvolatile Matter
21 – 25
Oil Resistance
54 – 56
Preparation of Test Specimens
7
Specific Gravity
9 – 12
Temperature Index
49 – 50
Time of Drying
33 – 37
Varnish Compatibility
51 – 53
Viscosity
13 – 17
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 standard. The values given in parentheses are for information only.
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 hazard statements, see Section 5.
Note 1: There is no equivalent IEC standard.
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Designation: D115 − 14
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,
DielectricStrengthofSolidElectricalInsulatingMaterials
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 38–42
D287 Test Method for API Gravity of Crude Petroleum and
Dielectric Strength 43–48
Drainage 26–32
Petroleum Products (Hydrometer Method)
Flash Point 18–20
D295 Test Methods for Varnished Cotton Fabrics Used for
Nonvolatile Matter 21–25
Oil Resistance 54–56 Electrical Insulation
Preparation of Test Specimens 7
D374 Test Methods for Thickness of Solid Electrical Insu-
Specific Gravity 9–12
3
lation (Withdrawn 2013)
Temperature Index 49 – 50
Time of Drying 33–37 D580 Specification for Greige Woven Glass Tapes and
Varnish Compatibility 51–53
Webbings
Viscosity 13–17
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
D1932 Test Method for Thermal Endurance of Flexible
method.
Electrical Insulating Varnishes
1.3 The values stated in SI units are to be regarded as D2518 Specification for Woven Glass Fabrics for Electrical
3
standard. The values given in parentheses are for information Insulation (Withdrawn 2013)
only. D2519 Test Method for Bond Strength of Electrical Insulat-
ing Varnishes by the Helical Coil Test
1.4 This standard does not purport to address all of the
D3145 Test Method for Thermal Endurance of Electrical
safety concerns, if any, associated with its use. It is the
Insulating Varnishes by the Helical Coil Method
responsibility of the user of this standard to establish appro-
D3251 Test Method for Thermal Endurance Characteristics
priate safety and health practices and determine the applica-
of Electrical Insulating Varnishes Applied Over Film-
bility of regulatory limitations prior to use. For specific hazard
Insulated Magnet Wire
statements, see Section 5.
D3278 Test Methods for Flash Point of Liquids by Small
NOTE 1—There is no equivalent IEC standard.
Scale Closed-Cup Apparatus
D3487 Specification for Mineral Insulating Oil Used in
2. Referenced Documents
Electrical Apparatus
2
2.1 ASTM Standards:
D5032 Practice for Maintaining Constant Relative Humidity
D56 Test Method for Flash Point by Tag Closed Cup Tester
by Means of Aqueous Glycerin Solutions
D5423 Specification for Forced-Convection Laboratory Ov-
ens for Evaluation of Electrical Insulation
1
These test methods are under the jurisdiction of ASTM Committee D09 on
E104 Practice for Maintaining Constant Relative Humidity
Electrical and Electronic Insulating Materials and are the direct responsibility of
Subcommittee D09.01 on Electrical Insulating Varnishes, Powders and Encapsulat- by Means of Aqueous Solutions
ing Compounds.
Current edition approved Nov. 1, 2014. Published November 2014. Originally
3. Terminology
approved in 1941. Last previous edition approved in 2012 as D115 – 07 (2012).
3.1 Definitions:
DOI: 10.1520/D0115-14.
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 The last approved version of this historical standard is referenced on
the ASTM website. 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
1
---------------------- Page: 1 ----------------------
D115 − 14
3.1.1 dielectric strength, n—the voltage gradient at which 4.2 Performance—The following tests are useful for deter-
dielectric failure of the insulating material occurs under spe- mining the performance of varnishes during application and
cific conditions of test. use:
4.2.1 Drainage,
3.1.2 drainage, n—of an insulating varnish, a measure of
4.2.2 Time of drying,
the variation in thickness from top to bott
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D115 − 07 (Reapproved 2012) D115 − 14
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*
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:
Procedure Section
Build 37 – 41
Build 38 – 42
Dielectric Strength 42 – 47
Dielectric Strength 43 – 48
Drainage 25 – 31
Drainage 26 – 32
Flash Point 17 – 19
Flash Point 18 – 20
Nonvolatile Matter 20 – 24
Nonvolatile Matter 21 – 25
Oil Resistance 53 – 55
Oil Resistance 54 – 56
Preparation of Test Specimens 7
Preparation of Test Specimens 7
Specific Gravity 9 – 12
Temperature Index 48-49
Temperature Index 49 – 50
Time of Drying 32 – 36
Time of Drying 33 – 37
Varnish Compatibility 50 – 52
Varnish Compatibility 51 – 53
Viscosity 13 – 16
Viscosity 13 – 17
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.
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 hazard statements, see Section 5.
NOTE 1—There is no equivalent IEC standard.
2. Referenced Documents
2
2.1 ASTM Standards:
D56 Test Method for Flash Point by Tag Closed Cup Tester
D93 Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at
Commercial Power Frequencies
D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
D287 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)
1
These test methods are under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and are the direct responsibility of Subcommittee
D09.01 on Electrical Insulating Varnishes, Powders and Encapsulating Compounds.
Current edition approved April 1, 2012Nov. 1, 2014. Published April 2012November 2014. Originally approved in 1941. Last previous edition approved in 20072012 as
D115 – 07.D115 – 07 (2012). DOI: 10.1520/D0115-07R12.10.1520/D0115-14.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
1
---------------------- Page: 1 ----------------------
D115 − 14
D295 Test Methods for Varnished Cotton Fabrics Used for Electrical Insulation
3
D374 Test Methods for Thickness of Solid Electrical Insulation (Withdrawn 2013)
D580 Specification for Greige Woven Glass Tapes and Webbings
D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products
D1638 Method of Testing Urethane Foam Isocyanate Raw Materials
D1932 Test Method for Thermal Endurance of Flexible Electrical Insulating Varnishes
3
D2518 Specification for Woven Glass Fabrics for Electrical Insulation (Withdrawn 2013)
D2519 Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test
D3145 Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method
D3251 Test Method for Thermal Endurance Characteristics of Electrical Insulating Varnishes Applied Over Film-Insulated
Magnet Wire
D3278 Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus
D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus
D5032 Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions
D5
...
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