ASTM D4733-17
(Test Method)Standard Test Methods for Solventless Electrical Insulating Varnishes
Standard Test Methods for Solventless Electrical Insulating Varnishes
SIGNIFICANCE AND USE
4.1 The test methods referenced in these test methods are useful for control purposes during the manufacture and use of solventless varnishes.
SCOPE
1.1 These test methods cover solventless varnishes used primarily as electrical, mechanical, and environmental protection for electrical equipment.
1.2 These test methods are used on solventless varnishes that are applied by dipping (at atmospheric pressure conditions or under vacuum or other certain pressure), spraying, or brushing for the purpose of impregnating or sealing electrical equipment. The following test methods are included:
Property Tests (Uncured):
Section
Density
7
Flash Point
8
Gel Time
9
Monomer Content
10
Rheological Properties (Non-Newtonian)
11
Rotational Viscosity
12
Performance Property Tests (cured):
Bond Strength
13
Coating Thickness
14
Dielectric Strength
15
Dielectric Strength-Using Metal Panels
16
Permittivity and Dissipation Factor
17
Build
18
1.3 The values stated in inch-pound units are to be regarded as the standard. The values 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in 8.3, 15.5.1, and 15.5.2.
Note 1: This test method is related to IEC 60455. Since both methods contain multiple test procedures, many procedures are technically equivalent while others differ significantly.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4733 − 17
Standard Test Methods for
1
Solventless Electrical Insulating Varnishes
This standard is issued under the fixed designation D4733; 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* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 These test methods cover solventless varnishes used
primarily as electrical, mechanical, and environmental protec-
2. Referenced Documents
tion for electrical equipment.
2
2.1 ASTM Standards:
1.2 These test methods are used on solventless varnishes
D93 Test Methods for Flash Point by Pensky-Martens
that are applied by dipping (at atmospheric pressure conditions
Closed Cup Tester
or under vacuum or other certain pressure), spraying, or
D115 Test Methods for Testing Solvent Containing Var-
brushing for the purpose of impregnating or sealing electrical
nishes Used for Electrical Insulation
equipment. The following test methods are included:
D149 Test Method for Dielectric Breakdown Voltage and
Property Tests (Uncured): Section
DielectricStrengthofSolidElectricalInsulatingMaterials
Density 7
at Commercial Power Frequencies
Flash Point 8
D150 Test Methods forAC Loss Characteristics and Permit-
Gel Time 9
Monomer Content 10
tivity (Dielectric Constant) of Solid Electrical Insulation
Rheological Properties (Non-Newtonian) 11
D374 Test Methods for Thickness of Solid Electrical Insu-
Rotational Viscosity 12
Performance Property Tests (cured): lation (Metric) D0374_D0374M
Bond Strength 13
D923 Practices for Sampling Electrical Insulating Liquids
Coating Thickness 14
D1475 Test Method for Density of Liquid Coatings, Inks,
Dielectric Strength 15
Dielectric Strength-Using Metal Panels 16 and Related Products
Permittivity and Dissipation Factor 17
D1711 Terminology Relating to Electrical Insulation
Build 18
D2196 Test Methods for Rheological Properties of Non-
1.3 The values stated in inch-pound units are to be regarded
Newtonian Materials by Rotational Viscometer
as the standard. The values in parentheses are for information
D2519 Test Method for Bond Strength of Electrical Insulat-
only.
ing Varnishes by the Helical Coil Test
1.4 This standard does not purport to address all of the D3056 Test Method for Gel Time of Solventless Varnishes
safety concerns, if any, associated with its use. It is the D3278 Test Methods for Flash Point of Liquids by Small
responsibility of the user of this standard to establish appro- Scale Closed-Cup Apparatus
priate safety, health, and environmental practices and deter- D3312 Test Method for Percent Reactive Monomer in Sol-
mine the applicability of regulatory limitations prior to use. ventless Varnishes
Specific hazard statements are given in 8.3, 15.5.1, and 15.5.2. D3487 Specification for Mineral Insulating Oil Used in
Electrical Apparatus
NOTE 1—This test method is related to IEC 60455. Since both methods
D3636 Practice for Sampling and Judging Quality of Solid
contain multiple test procedures, many procedures are technically equiva-
Electrical Insulating Materials
lent while others differ significantly.
D6054 Practice for Conditioning Electrical Insulating Mate-
1.5 This international standard was developed in accor-
3
rials for Testing (Withdrawn 2012)
dance with internationally recognized principles on standard-
E176 Terminology of Fire Standards
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1 2
These test methods are under the jurisdiction of ASTM Committee D09 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical and Electronic Insulating Materials and is the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee D09.01 on Electrical Insulating Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Nov. 1, 2017. Published November 2017. Originally theASTM website.
3
approved in 1987. Last previous edition approved in 2013 as D4733 – 13. DOI: The last approved version of this historical standard is referenced on
10.1520/D4733-17. 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 ----------------------
D4733 − 17
2.2 IEC S
...
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: D4733 − 13 D4733 − 17
Standard Test Methods for
1
Solventless Electrical Insulating Varnishes
This standard is issued under the fixed designation D4733; 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 solventless varnishes used primarily as electrical, mechanical, and environmental protection for
electrical equipment.
1.2 These test methods are used on solventless varnishes that are applied by dipping (at atmospheric pressure conditions or
under vacuum or other certain pressure), spraying, or brushing for the purpose of impregnating or sealing electrical equipment. The
following test methods are included:
Property Tests (Uncured): Section
Density 7
Flash Point 8
Gel Time 9
Monomer Content 10
Rheological Properties (Non-Newtonian) 11
Brookfield Viscosity 12
Performance Property Tests (cured):
Bond Strength 13
Coating Thickness 14
Dielectric Strength 15
Dielectric Strength-Using Metal Panels 16
Permittivity and Dissipation Factor 17
Build 18
Property Tests (Uncured): Section
Density 7
Flash Point 8
Gel Time 9
Monomer Content 10
Rheological Properties (Non-Newtonian) 11
Rotational Viscosity 12
Performance Property Tests (cured):
Bond Strength 13
Coating Thickness 14
Dielectric Strength 15
Dielectric Strength-Using Metal Panels 16
Permittivity and Dissipation Factor 17
Build 18
1.3 The values stated in inch-pound units are to be regarded as the standard. The values 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. Specific hazard statements are given in 8.3, 15.5.1, and 15.5.2.
NOTE 1—This test method is related to IEC 60455. Since both methods contain multiple test procedures, many procedures are technically equivalent
while others differ significantly.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
These test methods are under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of Subcommittee
D09.01 on Electrical Insulating Varnishes, Powders and Encapsulating CompoundsProducts.
Current edition approved April 1, 2013Nov. 1, 2017. Published April 2013November 2017. Originally approved in 1987. Last previous edition approved in 20092013 as
D4733 – 03 (2009).D4733 – 13. DOI: 10.1520/D4733-13.10.1520/D4733-17.
*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 ----------------------
D4733 − 17
2. Referenced Documents
2
2.1 ASTM Standards:
D93 Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
D115 Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation
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
3
D168 Test Method for Coke Residue of Creosote (Withdrawn 2006)
D374 Test Methods for Thickness of Solid Electrical Insulation (Metric) D0374_D0374M
D923 Practices for Sampling Electrical Insulating Liquids
D1475 Test Method for Density of Liquid Coatings, Inks, and Related Products
D1711 Terminology Relating to Electrical Insulation
D2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer
D2519 Test Method for Bond Strength of Electrical Insulating Varnishes by the Helical Coil Test
D3056 Test Method for Gel Time of Solventless Varnishes
D3278 Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus
D3312 Test Method for Percent Reactive Monomer in Solventless Varnis
...
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