ASTM D149-97a

Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

SCOPE
1.1 This test method covers procedures for the determination of dielectric strength of solid insulating materials at commercial power frequencies, under specified conditions.  
1.2 Unless otherwise specified, the tests shall be made at 60 Hz. However, this test method may be used at any frequency from 25 to 800 Hz. At frequencies above 800 Hz dielectric heating may be a problem.  
1.3 This test method is intended to be used in conjunction with any ASTM standard or other document that refers to this test method. References to this document should specify the particular options to be used (see 5.5).  
1.4 It may be used at various temperatures, and in any suitable gaseous or liquid surrounding medium.  
1.5 This test method is not intended for measuring the dielectric strength of materials that are fluid under the conditions of test.  
1.6 This test method is not intended for use in determining intrinsic dielectric strength, direct-voltage dielectric strength, or thermal failure under electrical stress (see Test Method D3151).  
1.7 This test method is most commonly used to determine the dielectric breakdown voltage through the thickness of a test specimen (puncture). It may also be used to determine dielectric breakdown voltage along the interface between a solid specimen and a gaseous or liquid surrounding medium (flashover). With the addition of instructions modifying Section 12, this test method may be used for proof testing.
1.8 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 Section 7. Also see Note 1.

General Information

• Status: Historical
• Publication Date: 31-Dec-1996
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.12 - Electrical Tests

Relations

• Replaced By: ASTM D149-97a(2004) - Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
• Effective Date: 01-Mar-2004
• Referred By: ASTM D116-86(2020) - Standard Test Methods for Vitrified Ceramic Materials for Electrical Applications
• Effective Date: 01-Jan-1997
• Referred By: ASTM D876-21 - Standard Test Methods for Nonrigid Vinyl Chloride Polymer Tubing Used for Electrical Insulation
• Effective Date: 01-Jan-1997
• Referred By: ASTM D470-21 - Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
• Effective Date: 01-Jan-1997
• Referred By: ASTM D2304-23 - Standard Test Method for Thermal Endurance of Rigid Electrical Insulating Materials
• Effective Date: 01-Jan-1997
• Referred By: ASTM D3294-22 - Standard Specification for Polytetrafluoroethylene (PTFE) Resin Molded Sheet and Molded Basic Shapes
• Effective Date: 01-Jan-1997
• Referred By: ASTM D5204-22 - Standard Classification System and Basis for Specification for Polyamide-Imide (PAI) Molding and Extrusion Materials
• Effective Date: 01-Jan-1997
• Referred By: ASTM G218-19 - Standard Guide for External Corrosion Protection of Ductile Iron Pipe Utilizing Polyethylene Encasement Supplemented by Cathodic Protection
• Effective Date: 01-Jan-1997
• Referred By: ASTM D1000-17 - Standard Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications
• Effective Date: 01-Jan-1997
• Referred By: ASTM D6040-18 - Standard Guide to Standard Test Methods for Unsintered Polytetrafluoroethylene (PTFE) Extruded Film or Tape
• Effective Date: 01-Jan-1997
• Referred By: ASTM D4325-20 - Standard Test Methods for Nonmetallic Semi-Conducting and Electrically Insulating Rubber Tapes
• Effective Date: 01-Jan-1997
• Referred By: ASTM F942-18(2023)e1 - Standard Guide for Selection of Test Methods for Interlayer Materials for Aerospace Transparent Enclosures
• Effective Date: 01-Jan-1997
• Referred By: ASTM D229-19e1 - Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation
• Effective Date: 01-Jan-1997
• Referred By: ASTM F665-09(2015) - Standard Classification for Vinyl Chloride Plastics Used in Biomedical Application
• Effective Date: 01-Jan-1997
• Referred By: ASTM D2148-22 - Standard Test Methods for Bondable Silicone Rubber Tapes Used for Electrical Insulation
• Effective Date: 01-Jan-1997

Standards Content (Sample)

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
An American National Standard
Designation: D 149 – 97a
Standard Test Method for
Dielectric Breakdown Voltage and Dielectric Strength of
Solid Electrical Insulating Materials at Commercial Power
1
Frequencies
This standard is issued under the fixed designation D 149; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 1.8 This test method is similar to IEC Publication 243-1. All
procedures in this method are included in IEC 243-1. Differ-
1.1 This test method covers procedures for the determina-
ences between this method and IEC 243-1 are largely editorial.
tion of dielectric strength of solid insulating materials at
,
2 3 1.9 This standard does not purport to address all of the
commercial power frequencies, under specified conditions.
safety concerns, if any, associated with its use. It is the
1.2 Unless otherwise specified, the tests shall be made at 60
responsibility of the user of this standard to establish appro-
Hz. However, this test method may be used at any frequency
priate safety and health practices and determine the applica-
from 25 to 800 Hz. At frequencies above 800 Hz dielectric
bility of regulatory limitations prior to use. Specific hazard
heating may be a problem.
statements are given in Section 7. Also see Note 1.
1.3 This test method is intended to be used in conjunction
with any ASTM standard or other document that refers to this
2. Referenced Documents
test method. References to this document should specify the
2.1 ASTM Standards:
particular options to be used (see 5.5).
D 374 Test Methods for Thickness of Solid Electrical Insu-
1.4 It may be used at various temperatures, and in any
4
lation
suitable gaseous or liquid surrounding medium.
D 618 Practice for Conditioning Plastics and Electrical
1.5 This test method is not intended for measuring the
5
Insulating Materials for Testing
dielectric strength of materials that are fluid under the condi-
D 877 Test Method for Dielectric Breakdown Voltage of
tions of test.
6
Insulating Liquids Using Disk Electrodes
1.6 This test method is not intended for use in determining
4
D 1711 Terminology Relating to Electrical Insulation
intrinsic dielectric strength, direct-voltage dielectric strength,
D 2413 Methods for Preparation and Electrical Testing of
or thermal failure under electrical stress (see Test Method
Insulating Paper and Board Impregnated with a Liquid
D 3151).
4
Dielectric
1.7 This test method is most commonly used to determine
D 3151 Test Method for Thermal Failure of Solid Electrical
the dielectric breakdown voltage through the thickness of a test
7
Insulating Materials Under Electric Stress
specimen (puncture). It may also be used to determine dielec-
D 3487 Specification for Mineral Insulating Oil Used in
tric breakdown voltage along the interface between a solid
6
Electrical Apparatus
specimen and a gaseous or liquid surrounding medium (flash-
D 5423 Specification for Forced-Convection Laboratory
over). With the addition of instructions modifying Section 12,
7
Ovens for Electrical Insulation
this test method may be used for proof testing.
2.2 IEC Standard:
Pub. 243-1 Methods of Test for Electrical Strength of Solid
1
This test method is under the jurisdiction of ASTM Committee D-9 on 8
Insulating Materials—Part 1: Tests at Power Frequencies
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.12 on Electrical Tests.
Current edition approved Sept. 10, 1997. Published January 1998. Originally
published as D 149 – 22 T. Last previous edition D 149 – 97.
2
Bartnikas, R., Chapter 3, “High Voltage Measurements,” Electrical Properties
4
of Solid Insulating Materials, Measurement Techniques, Vol. IIB, Engineering Annual Book of ASTM Standards, Vol 10.01.
5
Dielectrics, R. Bartnikas, Editor, ASTM STP 926, ASTM, Philadelphia, 1987. Annual Book of ASTM Standards, Vol 08.01.
3 6
Nelson, J. K., Chapter 5, “Dielectric Breakdown of Solids,” Electrical Annual Book of ASTM Standards, Vol 10.03.
7
Properties of Solid Insulating Materials: Molecular Structure and Electrical Annual Book of ASTM Standards, Vol 10.02.
8
Behavior, Vol. IIA, Engineering Dielectrics, R. Bartnikas and R. M. Eichorn, Available from the International Electrotechnical Commission, Geneva, Swit-
Editors, ASTM STP 783, ASTM, Philadelphia, 1983. zerland.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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