ASTM D3353-18
(Test Method)Standard Test Methods for Fibrous-Insulated Magnet Wire
Standard Test Methods for Fibrous-Insulated Magnet Wire
ABSTRACT
These test methods cover the testing of fibrous-insulated electrical conductors, commonly referred to as magnet wire, which are used in electrical apparatus. The test methods are intended primarily for evaluation of the electrical insulating materials used. It is intended that these test methods be used, except where modified by individual specifications for particular applications. This elongation testing method covers the determination of the elongation of fibrous insulated magnet wire that results in a fracture of the conductor. The electrical resistance testing method covers the determination of the electrical resistance of fibrous insulated magnet wire conductors. The fibrous coverage testing method covers the determination of the quality of fibrous servings on round magnet wire or bare conductor. The measurement of dimensions test methods determine the dimensions of the bare or film insulated conductor and the fibrous-insulated magnet wire. The adhesion and flexibility test method covers the evaluation of the flexibility and adherence of varnished fibrous glass, and varnished or unvarnished fibrous polyester-glass insulating material on either bare conductor, or film-insulated magnet wire. The dielectric breakdown voltage test method covers the determination of the dielectric breakdown voltage in air of insulation on round, rectangular, and square wires at commercial power frequencies.
SCOPE
1.1 These test methods cover the testing of fibrous-insulated electrical conductors, commonly referred to as magnet wire, which are used in electrical apparatus. The test methods are intended primarily for evaluation of the electrical insulating materials used. It is intended that these test methods be used, except where modified by individual specifications for particular applications.
1.1.1 These test methods apply to those magnet wires that are fiber-covered and in which the substrate is bare conductor or is coated with an underlying insulating film as covered by Test Methods D1676. Fiber-covered wires are produced by serving helically or wrapping fibers or fibrous-tape insulation uniformly around the wire in single and multiple layers. The served or wrapped materials are bonded or not bonded to the underlying wire.
1.2 The test methods appear in the following sections:
Procedure
Section
Measurement of Dimensions
7
Electrical Resistance of Conductors
5
Elongation
4
Adhesion and Flexibility
8
Fibrous Coverage
6
Dielectric Breakdown Voltage
9
1.3 This standard and IEC 60851 are similar if not equivalent in technical content.
1.4 This standard and NEMA MW 1000 are similar if not equivalent in technical content.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 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. See 8.4.1 and 9.4.1 for specific caution statements.
1.7 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.
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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: D3353 − 18
Standard Test Methods for
1
Fibrous-Insulated Magnet Wire
This standard is issued under the fixed designation D3353; 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* mine the applicability of regulatory limitations prior to use.
See 8.4.1 and 9.4.1 for specific caution statements.
1.1 These test methods cover the testing of fibrous-insulated
1.7 This international standard was developed in accor-
electrical conductors, commonly referred to as magnet wire,
dance with internationally recognized principles on standard-
which are used in electrical apparatus. The test methods are
ization established in the Decision on Principles for the
intended primarily for evaluation of the electrical insulating
Development of International Standards, Guides and Recom-
materials used. It is intended that these test methods be used,
mendations issued by the World Trade Organization Technical
except where modified by individual specifications for particu-
Barriers to Trade (TBT) Committee.
lar applications.
1.1.1 These test methods apply to those magnet wires that
2. Referenced Documents
are fiber-covered and in which the substrate is bare conductor
2
2.1 ASTM Standards:
or is coated with an underlying insulating film as covered by
B193 Test Method for Resistivity of Electrical Conductor
Test Methods D1676. Fiber-covered wires are produced by
Materials
serving helically or wrapping fibers or fibrous-tape insulation
D149 Test Method for Dielectric Breakdown Voltage and
uniformly around the wire in single and multiple layers. The
DielectricStrengthofSolidElectricalInsulatingMaterials
served or wrapped materials are bonded or not bonded to the
at Commercial Power Frequencies
underlying wire.
D1676 Test Methods for Film-Insulated Magnet Wire
1.2 The test methods appear in the following sections:
D1711 Terminology Relating to Electrical Insulation
Procedure Section
D5423 Specification for Forced-Convection Laboratory Ov-
Measurement of Dimensions 7
ens for Evaluation of Electrical Insulation
Electrical Resistance of Conductors 5
E8 Test Methods for Tension Testing of Metallic Materials
Elongation 4
Adhesion and Flexibility 8
2.2 Other Standards:
Fibrous Coverage 6
3
IEC 60851 Methods of Test for Winding Wires
Dielectric Breakdown Voltage 9
NEMA Standards Publication No. MW 1000 on Magnet
1.3 This standard and IEC 60851 are similar if not equiva-
4
Wire
lent in technical content.
1.4 This standard and NEMA MW 1000 are similar if not
3. Terminology
equivalent in technical content.
3.1 Definitions:
1.5 The values stated in inch-pound units are to be regarded
3.1.1 For definitions of terms used in this test method, refer
as standard. The values given in parentheses are mathematical
to Terminology D1711.
conversions to SI units that are provided for information only
3.1.2 Definition of Term(s) Specific to this Standard:
and are not considered standard.
3.1.2.1 serving—a uniform wrapping of fibrous insulation
around a magnet wire of bare conductor.
1.6 This standard does not purport to address all of the
3.1.2.2 fibrous coverage, of served-magnet wire—that char-
safety concerns, if any, associated with its use. It is the
acteristic which allows a fibrous served magnet wire to be
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
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
1
These test methods are under the jurisdiction of ASTM Committee D09 on Standards volume information, refer to the standard’s Document Summary page on
Electrical and Electronic Insulating Materials and are the direct responsibility of the ASTM website.
3
Subcommittee D09.12 on Electrical Tests. Available from International Engineering Consortium, 549 West Randolph
Current edition approved March 15, 2018. Published March 2018. Originally Street, Suite 600, Chicago IL 60661–2208.
4
approved in 1974. Last previous edition approved in 2010 as D3353 – 10. DOI: Available from National Electrical Manufacturers Association (NEMA), 1300
10.1520/D3353-18. N. 17th St., Suite 1752, Rosslyn, VA 22209, http://www.nema.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
--------------------
...
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: D3353 − 10 D3353 − 18
Standard Test Methods for
1
Fibrous-Insulated Magnet Wire
This standard is issued under the fixed designation D3353; 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 the testing of fibrous-insulated electrical conductors, commonly referred to as magnet wire, which
are used in electrical apparatus. The test methods are intended primarily for evaluation of the electrical insulating materials used.
It is intended that these test methods be used, except where modified by individual specifications for particular applications.
1.1.1 These test methods apply to those magnet wires that are fiber-covered and in which the substrate is bare conductor or is
coated with an underlying insulating film as covered by Test Methods D1676. Fiber-covered wires are produced by serving
helically or wrapping fibers or fibrous-tape insulation uniformly around the wire in single and multiple layers. The served or
wrapped materials are bonded or not bonded to the underlying wire.
1.2 The test methods appear in the following sections:
Procedure Section
Measurement of Dimensions 7
Electrical Resistance of Conductors 5
Elongation 4
Adhesion and Flexibility 8
Fibrous Coverage 6
Dielectric Breakdown Voltage 9
1.3 This standard and IEC 60851 are similar if not equivalent in technical content.
1.4 This standard and NEMA MW 1000 are similar if not equivalent in technical content.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.6 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. See 8.4.1 and 9.4.1 for specific caution statements.
1.7 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B193 Test Method for Resistivity of Electrical Conductor Materials
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at
Commercial Power Frequencies
D1676 Test Methods for Film-Insulated Magnet Wire
D1711 Terminology Relating to Electrical Insulation
D5423 Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation
E8 Test Methods for Tension Testing of Metallic Materials
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
D09.12 on Electrical Tests.
Current edition approved Jan. 1, 2010March 15, 2018. Published February 2010March 2018. Originally approved in 1974. Last previous edition approved in 20042010
as D3353D3353 – 10.–04. DOI: 10.1520/D3353-10.10.1520/D3353-18.
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 ----------------------
D3353 − 18
2.2 Other Standards:
3
IEC 60851 Methods of Test for Winding Wires
4
NEMA Standards Publication No. MW 1000 on Magnet Wire
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology D1711.
3.1.2 Definition of Term(s) Specific to this Standard:
3.1.2.1 serving—a uniform wrapping of fibrous insulation around a magnet wire of bare conductor.
3.1.2.2 fibrous coverage, of served-magnet wire—that characteristic which allows a fibrous served magnet wire to be wound
around mandrels
...
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3353 − 18
Standard Test Methods for
1
Fibrous-Insulated Magnet Wire
This standard is issued under the fixed designation D3353; 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* mine the applicability of regulatory limitations prior to use.
See 8.4.1 and 9.4.1 for specific caution statements.
1.1 These test methods cover the testing of fibrous-insulated
1.7 This international standard was developed in accor-
electrical conductors, commonly referred to as magnet wire,
dance with internationally recognized principles on standard-
which are used in electrical apparatus. The test methods are
ization established in the Decision on Principles for the
intended primarily for evaluation of the electrical insulating
Development of International Standards, Guides and Recom-
materials used. It is intended that these test methods be used,
mendations issued by the World Trade Organization Technical
except where modified by individual specifications for particu-
Barriers to Trade (TBT) Committee.
lar applications.
1.1.1 These test methods apply to those magnet wires that
2. Referenced Documents
are fiber-covered and in which the substrate is bare conductor
2
2.1 ASTM Standards:
or is coated with an underlying insulating film as covered by
B193 Test Method for Resistivity of Electrical Conductor
Test Methods D1676. Fiber-covered wires are produced by
Materials
serving helically or wrapping fibers or fibrous-tape insulation
D149 Test Method for Dielectric Breakdown Voltage and
uniformly around the wire in single and multiple layers. The
Dielectric Strength of Solid Electrical Insulating Materials
served or wrapped materials are bonded or not bonded to the
at Commercial Power Frequencies
underlying wire.
D1676 Test Methods for Film-Insulated Magnet Wire
1.2 The test methods appear in the following sections:
D1711 Terminology Relating to Electrical Insulation
Procedure Section
D5423 Specification for Forced-Convection Laboratory Ov-
Measurement of Dimensions 7
ens for Evaluation of Electrical Insulation
Electrical Resistance of Conductors 5
E8 Test Methods for Tension Testing of Metallic Materials
Elongation 4
Adhesion and Flexibility 8
2.2 Other Standards:
Fibrous Coverage 6
3
IEC 60851 Methods of Test for Winding Wires
Dielectric Breakdown Voltage 9
NEMA Standards Publication No. MW 1000 on Magnet
1.3 This standard and IEC 60851 are similar if not equiva-
4
Wire
lent in technical content.
1.4 This standard and NEMA MW 1000 are similar if not
3. Terminology
equivalent in technical content.
3.1 Definitions:
1.5 The values stated in inch-pound units are to be regarded
3.1.1 For definitions of terms used in this test method, refer
as standard. The values given in parentheses are mathematical
to Terminology D1711.
conversions to SI units that are provided for information only
3.1.2 Definition of Term(s) Specific to this Standard:
and are not considered standard.
3.1.2.1 serving—a uniform wrapping of fibrous insulation
around a magnet wire of bare conductor.
1.6 This standard does not purport to address all of the
3.1.2.2 fibrous coverage, of served-magnet wire—that char-
safety concerns, if any, associated with its use. It is the
acteristic which allows a fibrous served magnet wire to be
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
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
1
These test methods are under the jurisdiction of ASTM Committee D09 on Standards volume information, refer to the standard’s Document Summary page on
Electrical and Electronic Insulating Materials and are the direct responsibility of the ASTM website.
3
Subcommittee D09.12 on Electrical Tests. Available from International Engineering Consortium, 549 West Randolph
Current edition approved March 15, 2018. Published March 2018. Originally Street, Suite 600, Chicago IL 60661–2208.
4
approved in 1974. Last previous edition approved in 2010 as D3353 – 10. DOI: Available from National Electrical Manufacturers Association (NEMA), 1300
10.1520/D3353-18. N. 17th St., Suite 1752, Rosslyn, VA 22209, http://www.nema.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 ----------------------
D3353 − 18
wound around mandrels in a prescribed manner without
B = original length
causing observa
...
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