Standard Terminology Relating to Electrical Insulation

SCOPE
1.1 This terminology is a compilation of technical terms used in conjunction with testing and specifying solid electrical and electronic insulating materials in standards under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials.
1.2 It is intended that all definitions in this terminology are identical to definitions of the same terms as printed in standards of originating technical subcommittees, with the exceptions of: ( 1) deletion of any part of the Discussion included in another standard that refers specifically to the use of a term in that standard; ( 2) figure numbers and corresponding references; and ( 3) in this terminology, a parenthetical addition of a reference to one or more technical standards in which the term is used and the year in which the term was added to this compilation.
1.3 Symbols may be included as part of the representation of terms, where appropriate.
1.4 It is not intended that this terminology include descriptions of terms or symbols (except as noted in 1.3). Acronyms and abbreviations referring directly to defined terms may be included.
1.5 Revisions and additions to the definitions in this terminology are to be made as a product of a collaborative effort between Subcommittee D09.94 and the various technical subcommittees of Committee D09, with Subcommittee D09.94 providing editorial advice to the technical subcommittees. New definitions and revisions of existing definitions must first be approved by the cognizant technical subcommittee (or subcommittees) before inclusion in this terminology.

General Information

Status
Historical
Publication Date
09-Mar-2002
Current Stage
Ref Project

Relations

Effective Date
10-Mar-2002

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An American National Standard
Designation:D1711–02
Standard Terminology Relating to
1
Electrical Insulation
This standard is issued under the fixed designation D1711; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This terminology is used in connection with testing and specifying solid electrical insulating
materials. Modifications to this terminology, reflecting common usage, may appear in particular test
methods, material specifications, practices, or other standards. Included herein are terms pertinent to
general applications, electrical insulating papers, mica, mica processing, processed mica forms,
hookup wire insulation, and partial discharge (corona).
1. Scope 2. Referenced Documents
1.1 This terminology is a compilation of technical terms 2.1 ASTM Standards:
used in conjunction with testing and specifying solid electrical D149 Test Method for Dielectric Breakdown Voltage and
and electronic insulating materials in standards under the Dielectric Strength of Electrical Insulating Materials at
2
jurisdiction of Committee D09 on Electrical and Electronic Commercial Power Frequencies
Insulating Materials. D150 Test Methods for AC Loss Characteristics and Per-
2
1.2 Itisintendedthatalldefinitionsinthisterminologyare mittivityDielectricConstantofSolidElectricalInsulation
identicaltodefinitionsofthesametermsasprintedinstandards D3426 Test Method for Dielectric Breakdown Voltage and
oforiginatingtechnicalsubcommittees,withtheexceptionsof: Dielectric Strength of Solid Electrical Insulating Materials
3
(1) deletion of any part of the Discussion included in another Using Impulse Waves
standard that refers specifically to the use of a term in that D3636 Practice for Sampling and Judging Quality of Solid
3
standard;(2)figurenumbersandcorrespondingreferences;and Electrical Insulating Materials
(3) in this terminology, a parenthetical addition of a reference 2.2 Other Standards:
4
to one or more technical standards in which the term is used ANSI/ASQC A2-1987
and the year in which the term was added to this compilation.
3. Terminology
1.3 Symbols may be included as part of the representation
of terms, where appropriate.
acceptable quality level (AQL), n—the maximum percent
1.4 It is not intended that this terminology include descrip-
nonconforming which, for purposes of sampling inspection,
tions of terms or symbols (except as noted in 1.3). Acronyms
is considered satisfactory as a process average.
and abbreviations referring directly to defined terms may be
acceptance number, n—the maximum allowable number of
included.
nonconformities for a given AQL and sample size (lot-
1.5 Revisions and additions to the definitions in this termi-
sample size).
nology are to be made as a product of a collaborative effort
air chain, n—in mica, a series of air inclusions in the form of
between Subcommittee D09.94 and the various technical
a chain or streak.
subcommitteesofCommitteeD09,withSubcommitteeD09.94
arc propagation, n—the movement of an electric arc from its
providingeditorialadvicetothetechnicalsubcommittees.New
point of inception to another location. (1996) D 3032
definitions and revisions of existing definitions must first be
arc tracking,n—theprocessproducingtrackswhenarcsoccur
approvedbythecognizanttechnicalsubcommittee(orsubcom-
on or close to the insulation surface.
mittees) before inclusion in this terminology.
Arrhenius plot, n—a graph of the logarithm of thermal life as
a function of the reciprocal of absolute temperature.
1
This terminology is under the jurisdiction of ASTM Committee D09 on
2
Electrical and Electronic Insulating Materials and is the direct responsibility of Annual Book of ASTM Standards, Vol 10.01.
3
Subcommittee D09.94 on Editorial. Annual Book of ASTM Standards, Vol 10.02.
4
Current edition approved March 10, 2002. Published June 2002. Originally Available fromAmerican National StandardsAssociation, 11W. 42nd St., 13th
published as D1711–60T. Last previous edition D1711–99. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D1711
DISCUSSION—This is normally depicted as the best straight line fit,
concentric-lay conductor, n—a conductor composed of a
determined by least squares, of end points obtained at aging tempera-
central core surrounded by one or more layers of helically
tures.Itisimportantthattheslope,whichistheactivationenergyofthe
laid strands.
degradation reaction, be approximately constant within the selected
temperature range t
...

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