ASTM D4733-13
(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
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
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 and health 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.
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Designation: D4733 − 13
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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These test methods cover solventless varnishes used
D93 Test Methods for Flash Point by Pensky-Martens
primarily as electrical, mechanical, and environmental protec-
Closed Cup Tester
tion for electrical equipment.
D115 Test Methods for Testing Solvent Containing Var-
1.2 These test methods are used on solventless varnishes
nishes Used for Electrical Insulation
that are applied by dipping (at atmospheric pressure conditions
D149 Test Method for Dielectric Breakdown Voltage and
or under vacuum or other certain pressure), spraying, or DielectricStrengthofSolidElectricalInsulatingMaterials
brushing for the purpose of impregnating or sealing electrical at Commercial Power Frequencies
D150 Test Methods forAC Loss Characteristics and Permit-
equipment. The following test methods are included:
tivity (Dielectric Constant) of Solid Electrical Insulation
Property Tests (Uncured): Section
Density 7 D168 Test Method for Coke Residue of Creosote (With-
3
Flash Point 8
drawn 2006)
Gel Time 9
D374 Test Methods for Thickness of Solid Electrical Insu-
Monomer Content 10
3
Rheological Properties (Non-Newtonian) 11
lation (Withdrawn 2013)
Brookfield Viscosity 12
D923 Practices for Sampling Electrical Insulating Liquids
Performance Property Tests (cured):
D1475 Test Method For Density of Liquid Coatings, Inks,
Bond Strength 13
Coating Thickness 14
and Related Products
Dielectric Strength 15
D1711 Terminology Relating to Electrical Insulation
Dielectric Strength-Using Metal Panels 16
D2196 Test Methods for Rheological Properties of Non-
Permittivity and Dissipation Factor 17
Build 18
Newtonian Materials by Rotational (Brookfield type)
Viscometer
1.3 The values stated in inch-pound units are to be regarded
D2519 Test Method for Bond Strength of Electrical Insulat-
as the standard. The values in parentheses are for information
ing Varnishes by the Helical Coil Test
only.
D3056 Test Method for Gel Time of Solventless Varnishes
1.4 This standard does not purport to address all of the
D3278 Test Methods for Flash Point of Liquids by Small
safety concerns, if any, associated with its use. It is the Scale Closed-Cup Apparatus
responsibility of the user of this standard to establish appro- D3312 Test Method for Percent Reactive Monomer in Sol-
ventless Varnishes
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific hazard D3487 Specification for Mineral Insulating Oil Used in
Electrical Apparatus
statements are given in 8.3, 15.5.1, and 15.5.2.
D3636 Practice for Sampling and Judging Quality of Solid
NOTE 1—This test method is related to IEC 60455. Since both methods
Electrical Insulating Materials
contain multiple test procedures, many procedures are technically equiva-
D6054 Practice for Conditioning Electrical Insulating Mate-
lent while others differ significantly.
3
rials for Testing (Withdrawn 2012)
E176 Terminology of Fire Standards
1
These test methods are under the jurisdiction of ASTM Committee D09 on
2
Electrical and Electronic Insulating Materials and is the direct responsibility of For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Subcommittee D09.01 on Electrical Insulating Varnishes, Powders and Encapsulat- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ing Compounds. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 1, 2013. Published April 2013. Originally the ASTM website.
3
approved in 1987. Last previous edition approved in 2009 as D4733 – 03 (2009). The last approved version of this historical standard is referenced on
DOI: 10.1520/D4733-13. 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 − 13
2.2 IEC Standards homogeneous, take samples from two or three places on the
IEC 60455 Resin Based Reactive Compunds Used for Elec- surface and mix together.
trical Insulation
5.3 Sampling Fluids Exhibiting Non-Newtonian Viscosity:
5.3.1 Sample solventless varnishes exhibiting non-
3. Terminology
Newtonian viscosity in accordance with 5.2.3.
3.1 Definitions:
5.4 Use sample containers
...
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 − 03 (Reapproved 2009) D4733 − 13 An American National Standard
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 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
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 and health 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.
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)
3
D374 Test Methods for Thickness of Solid Electrical Insulation (Withdrawn 2013)
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 (Brookfield type) Viscometer
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 Compounds.
Current edition approved Oct. 1, 2009April 1, 2013. Published February 2010April 2013. Originally approved in 1987. Last previous edition approved in 20032009 as
D4733 – 03.D4733 – 03 (2009). DOI: 10.1520/D4733-03R09.10.1520/D4733-13.
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.
3
The last approved version of this historical standard is referenced 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
1
---------------------- Page: 1 ----------------------
D4733 − 13
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 Varnishes
D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus
D3636 Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials
3
D6054 Practice for Conditioning Electrical Insulating Materials for Testing (Withdrawn 2012)
E176 Terminology of Fire Standards
...
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