SIST EN 60034-18-1:2011
(Main)Rotating electrical machines - Part 18-1: Functional evaluation of insulation systems - General guidelines (IEC 60034-18-1:2010)
Rotating electrical machines - Part 18-1: Functional evaluation of insulation systems - General guidelines (IEC 60034-18-1:2010)
This part of IEC 60034 deals with the general guidelines for functional evaluation of electrical
insulation systems, used or proposed to be used in rotating electrical machines within the
scope of IEC 60034-1, in order to qualify them.
Drehende elektrische Maschinen - Teil 18-1: Funktionelle Bewertung von Isoliersystemen - Allgemeine Richtlinien (IEC 60034-18-1:2010)
Machines électriques tournantes - Partie 18-1: Evaluation fonctionnelle des systèmes d'isolation - Principes directeurs généraux (CEI 60034-18-1:2010)
La CEI 60034-18-1:2010 traite des principes directeurs généraux d'évaluation fonctionnelle des systèmes d'isolation électrique, utilisés ou que l'on se propose d'utiliser dans les machines électriques tournantes entrant dans le domaine d'application de la CEI 60034-1, en vue de leur qualification. Cette nouvelle édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - comme auparavant, fournit des recommandations générales pour l'évaluation fonctionnelle de différents types d'enroulements mais aussi au-delà, pour l'évaluation fonctionnelle des enroulements qui subissent une contrainte électrique du fait d'une alimentation par convertisseur; - met l'accent sur des recommandations générales, tous les détails techniques des procédures et des principes de qualification étant déplacés vers les parties concernées; - détaille des aspects généraux supplémentaires de l'évaluation fonctionnelle, particulièrement la procédure statistique pour dresser la comparaison entre les systèmes d'isolation candidat et de référence, ainsi que l'évaluation des changements mineurs de composants et de procédé de fabrication; - contient un nouvel essai d'acceptation pour la vérification du niveau de qualité de production visé pour le système d'isolation; - comme résultat de l'évaluation fonctionnelle, restreint la classification du système d'isolation à la classification thermique.
Električni rotacijski stroji - 18-1. del: Funkcijsko ocenjevanje izolacijskih sistemov - Splošne smernice (IEC 60034-18-1:2010)
Ta del IEC 60034 obravnava splošne smernice za funkcijsko ocenjevanje električnih izolacijskih sistemov, ki se uporabljajo ali so predlagani za uporabo v električnih rotacijskih strojih v okviru uporabe IEC 60034-1, za njihovo kvalifikacijo.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60034-18-1:2011
01-maj-2011
1DGRPHãþD
SIST EN 60034-18-1:1999
(OHNWULþQLURWDFLMVNLVWURMLGHO )XQNFLMVNRRFHQMHYDQMHL]RODFLMVNLKVLVWHPRY
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Rotating electrical machines - Part 18-1: Functional evaluation of insulation systems -
General guidelines (IEC 60034-18-1:2010)
Drehende elektrische Maschinen - Teil 18-1: Funktionelle Bewertung von
Isoliersystemen - Allgemeine Richtlinien (IEC 60034-18-1:2010)
Machines électriques tournantes - Partie 18-1: Evaluation fonctionnelle des systèmes
d'isolation - Principes directeurs généraux (CEI 60034-18-1:2010)
Ta slovenski standard je istoveten z: EN 60034-18-1:2010
ICS:
29.080.30 Izolacijski sistemi Insulation systems
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST EN 60034-18-1:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60034-18-1:2011
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SIST EN 60034-18-1:2011
EUROPEAN STANDARD
EN 60034-18-1
NORME EUROPÉENNE
May 2010
EUROPÄISCHE NORM
ICS 29.160 Supersedes EN 60034-18-1:1994 + A1:1996
English version
Rotating electrical machines -
Part 18-1: Functional evaluation of insulation systems -
General guidelines
(IEC 60034-18-1:2010)
Machines électriques tournantes - Drehende elektrische Maschinen -
Partie 18-1: Evaluation fonctionnelle Teil 18-1: Funktionelle Bewertung
des systèmes d'isolation - von Isoliersystemen -
Principes directeurs généraux Allgemeine Richtlinien
(CEI 60034-18-1:2010) (IEC 60034-18-1:2010)
This European Standard was approved by CENELEC on 2010-05-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60034-18-1:2010 E
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SIST EN 60034-18-1:2011
EN 60034-18-1:2010 - 2 -
Foreword
The text of document 2/1583/FDIS, future edition 2 of IEC 60034-18-1, prepared by IEC TC 2, Rotating
machinery, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60034-18-1 on 2010-05-01.
This European Standard supersedes EN 60034-18-1:1994 + A1:1996.
This EN 60034-18-1:2010 includes the following significant technical changes with respect to
EN 60034-18-1:1994 + A1:1996:
– provides general guidelines for functional evaluation of different types of windings as before but
beyond that for electrical evaluation of windings which are electrically stressed by converter-supply;
– is now focused on general guidelines with all technical details of procedures and qualification
principles moved to the subsequent parts;
– details additional general aspects of functional evaluation, particularly the statistical procedure for
comparison between reference and candidate insulation systems and the evaluation of minor
component or manufacturing changes;
– contains a new acceptance test for verifying the expected production quality level of the insulation
systems;
– restricts the classification of insulation systems as a result of the functional evaluation to thermal
classification. Other kinds of classifications (classes) of insulation systems no longer exist.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2011-02-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2013-05-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60034-18-1:2010 was approved by CENELEC as a European
Standard without any modification.
__________
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SIST EN 60034-18-1:2011
- 3 - EN 60034-18-1:2010
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60034-1 - Rotating electrical machines - EN 60034-1 -
Part 1: Rating and performance
IEC 60034-18-21 - Rotating electrical machines - EN 60034-18-21 -
Part 18: Functional evaluation of insulation
systems -
Section 21: Test procedures for wire-wound
windings - Thermal evaluation and
classification
IEC 60034-18-22 - Rotating electrical machines - EN 60034-18-22 -
Part 18-22: Functional evaluation of
insulation systems - Test procedures for
wire-wound windings - Classification of
changes and insulation component
substitutions
IEC 60034-18-31 - Rotating electrical machines - EN 60034-18-31 -
Part 18: Functional evaluation of insulation
systems -
Section 31: Test procedures for form-
wound windings - Thermal evaluation and
classification of insulation systems used in
machines up to and including 50 MVA and
15 kV
IEC/TR 60034-18-32 - Rotating electrical machines - CLC/TR 60034-18-32 -
Part 18-32: Functional evaluation of
insulation systems - Test procedures for
form-wound windings - Electrical evaluation
of insulation systems used in machines up
to and including 50 MVA and 15 kV
IEC/TR 60034-18-33 - Rotating electrical machines - CLC/TR 60034-18-33 -
Part 18-33: Functional evaluation of
insulation systems - Test procedures for
form-wound windings - Multifactor
functional evaluation - Endurance under
combined thermal and electrical stresses of
insulation systems used in machines up to
and including 50 MVA and 15 kV
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SIST EN 60034-18-1:2011
EN 60034-18-1:2010 - 4 -
Publication Year Title EN/HD Year
IEC/TS 60034-18-34 - Rotating electrical machines - CLC/TS 60034-18-34 -
Part 18-34: Functional evaluation of
insulation systems - Test procedures for
form-wound windings - Evaluation of
thermomechanical endurance of insulation
systems
IEC/TS 60034-18-41 - Rotating electrical machines - - -
Part 18-41: Qualification and type tests for
Type I electrical insulation systems used in
rotating electrical machines fed from
voltage converters
IEC/TS 60034-18-42 - Rotating electrical machines - - -
Part 18-42: Qualification and acceptance
tests for partial discharge resistant electrical
insulation systems (Type II) used in rotating
electrical machines fed from voltage
converters
IEC 60085 - Electrical insulation - Thermal evaluation EN 60085 -
and designation
IEC 60216 Series Electrical insulating materials - Properties EN 60216 Series
of thermal endurance
IEC 60493-1 - Guide for the statistical analysis of ageing - -
test data -
Part 1: Methods based on mean values of
normally distributed test results
IEC 60505 2004 Evaluation and qualification of electrical EN 60505 2004
insulation systems
IEC 62539 - Guide for the statistical analysis of - -
electrical insulation breakdown data
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SIST EN 60034-18-1:2011
IEC 60034-18-1
®
Edition 2.0 2010-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 18-1: Functional evaluation of insulation systems – General guidelines
Machines électriques tournantes –
Partie 18-1: Evaluation fonctionnelle des systèmes d’isolation – Principes
directeurs généraux
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
Q
CODE PRIX
ICS 29.160 ISBN 978-2-88910-019-4
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 60034-18-1:2011
– 2 – 60034-18-1 © IEC:2010
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .7
3.1 General terms .7
3.2 Terms relating to the objects being tested .8
3.3 Terms relating to factors of influence and ageing factors .8
3.4 Terms relating to testing and evaluation .9
4 General aspects of functional evaluation .9
4.1 Introductory remarks .9
4.2 Effects of ageing factors.10
4.3 Reference/candidate insulation system.10
4.4 Evaluation of minor component or manufacturing changes .11
4.5 Functional tests.11
4.6 Acceptance tests.11
5 Thermal functional tests .12
5.1 General aspects of thermal functional tests .12
5.2 Analysis, reporting and classification.12
6 Electrical functional tests.13
6.1 General aspects of electrical functional tests.13
6.2 Analysis and reporting.13
7 Mechanical functional tests.14
8 Environmental functional tests.14
9 Multifactor functional tests.14
Bibliography.16
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SIST EN 60034-18-1:2011
60034-18-1 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 18-1: Functional evaluation of insulation systems –
General guidelines
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote interna-
tional co-operation on all questions concerning standardization in the electrical and electronic fields. To this
end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Techni-
cal Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”).
Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject
dealt with may participate in this preparatory work. International, governmental and non-governmental organiza-
tions liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Or-
ganization for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all inter-
ested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinter-
pretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence be-
tween any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and ex-
penses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publica-
tions.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of pat-
ent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60034-18-1 has been prepared by IEC technical committee 2:
Rotating machinery.
This second edition cancels and replaces the first edition, published in 1992, and its amend-
ment 1 published in 1996, and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– provides general guidelines for functional evaluation of different types of windings as be-
fore but beyond that for electrical evaluation of windings which are electrically stressed by
converter-supply;
– is now focused on general guidelines with all technical details of procedures and qualifica-
tion principles moved to the subsequent parts;
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SIST EN 60034-18-1:2011
– 4 – 60034-18-1 © IEC:2010
– details additional general aspects of functional evaluation, particularly the statistical pro-
cedure for comparison between reference and candidate insulation systems and the
evaluation of minor component or manufacturing changes;
– contains a new acceptance test for verifying the expected production quality level of the
insulation systems;
– restricts the classification of insulation systems as a result of the functional evaluation to
thermal classification. Other kinds of classifications (classes) of insulation systems no
longer exist.
The text of this standard is based on the following documents:
FDIS Report on voting
2/1583/FDIS 2/1592/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
NOTE A list of cross-references of all IEC TC 2 publications can be found in the IEC TC 2 dashboard on the IEC
website.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the publica-
tion will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN 60034-18-1:2011
60034-18-1 © IEC:2010 – 5 –
INTRODUCTION
IEC 60034-18 comprises several parts, dealing with different types of functional evaluation
and special kinds of test procedures for insulation systems of rotating electrial machines.
IEC 60034-18-1 provides general guidelines for such procedures and qualification principles,
whereas the subsequent parts IEC 60034-18-21, IEC 60034-18-22, IEC 60034-18-31,
IEC 60034-18-32, IEC 60034-18-33, IEC 60034-18-34, IEC 60034-18-41 and IEC 60034-18-
42 give detailed procedures for the various types of windings. Beyond that, part IEC 60034-
18-41 and IEC 60034-18-42 contain special test procedures for electrical evaluation of
windings electrically stressed by converter-supply.
The following standards provide the basis and background for the development of the
previous standards:
IEC 60505 establishes the basis for estimating the ageing of electrical insulation systems
under conditions of either electrical, thermal, mechanical, environmental stresses or
combinations of these (multifactor stresses). It specifies the general principles and
procedures that should be followed defining functional test and evaluation procedures.
The IEC 60216 series deals with the determination of thermal endurance properties of single
insulating materials. On the assumption, that the Arrhenius equations describe the rate of
thermal ageing, test procedures and analyzing instructions for getting characteristic
parameters like the “Temperature index” (TI), the “Halving interval” (HIC) and the “Relative
thermal endurance index” (RTE) are given. For all these parameters selected properties and
accepted end-point-criteria are specified. Consequently, a material may be assigned with
more than one temperature index, derived from the measurement of different properties and
the use of different end-point criteria.
IEC 60085 deals with thermal evaluation of insulation systems used in electrical equipment. In
particular, thermal classes of insulation systems are defined and designations are given,
such as 130 (B), 155 (F) and 180 (H) for use in rotating machines belonging to IEC 60034-1.
In the past, materials for insulation systems were often selected solely on the basis of thermal
endurance of individual materials performed according to the IEC 60216 series. However,
IEC 60085 recognizes that such selection may be used only for screening materials prior to
further functional evaluation of a new insulation system which is not service-proven. Evalua-
tion is performed on the basis of a comparison with a service-proven reference insulation sys-
tem. Service experience is the preferred basis for assessing the thermal endurance of an in-
sulation system.
IEC 62539 defines statistical methods to analyse times to breakdown and breakdown voltage
data obtained from electrical testing of solid insulation materials, for the purposes of
characterization of the system and comparison with other insulation systems. The methods of
analysis are described for the Weibull-distribution but other distributions are also presented.
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SIST EN 60034-18-1:2011
– 6 – 60034-18-1 © IEC:2010
ROTATING ELECTRICAL MACHINES –
Part 18-1: Functional evaluation of insulation systems –
General guidelines
1 Scope
This part of IEC 60034 deals with the general guidelines for functional evaluation of electrical
insulation systems, used or proposed to be used in rotating electrical machines within the
scope of IEC 60034-1, in order to qualify them.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance
IEC 60034-18-21, Rotating electrical machines – Part 18-21: Functional evaluation of insula-
tion systems – Test procedures for wire-wound windings – Thermal evaluation and classifica-
tion
IEC 60034-18-22, Rotating electrical machines – Part 18-22: Functional evaluation of insula-
tion systems – Test procedures for wire-wound windings – Classification of changes and insu-
lation component substitutions
IEC 60034-18-31, Rotating electrical machines – Part 18-31: Functional evaluation of insula-
tion systems – Test procedures for form-wound windings – Thermal evaluation and classifica-
tion of insulation systems used in machines up to and including 50 MVA and 15 kV
IEC 60034-18-32, Rotating electrical machines – Part 18-32: Functional evaluation of insula-
tion systems – Test procedures for form-wound windings – Evaluation of electrical endurance
of insulation systems used in machines up to and including 50 MVA and 15 kV
IEC 60034-18-33, Rotating electrical machines – Part 18-33: Functional evaluation of insula-
tion systems – Test procedures for form-wound windings – Multifactor functional evaluation –
Endurance under combined thermal and electrical stresses of insulation systems used in ma-
chines up to and including 50 MVA and 15 kV
IEC 60034-18-34, Rotating electrical machines – Part 18-34: Functional evaluation of insula-
tion systems – Test procedures for form-wound windings – Evaluation of thermomechanical
endurance of insulation systems
IEC 60034-18-41, Rotating electrical machines – Part 18-41: Qualification and type tests for
Type I electrical insulation systems used in rotating electrical machines fed from voltage con-
verters
IEC/TS 60034-18-42, Rotating electrical machines – Part 18-42: Qualification and acceptance
tests for partial discharge resistant electrical insulation systems (Type II) used in rotating
electrical machines fed from voltage converters
IEC 60085, Thermal evaluation and designation of electrical insulation
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SIST EN 60034-18-1:2011
60034-18-1 © IEC:2010 – 7 –
IEC 60216 (all parts), Electrical insulating materials – Properties of thermal endurance
IEC 60493-1, Guide for the statistical analysis of ageing test data – Part 1: Methods based on
mean values of normally distributed test results
IEC 60505:2004, Evaluation and qualification of electrical insulation systems
IEC 62539, Guide for the statistical analysis of electrical insulation breakdown data
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 General terms
3.1.1
class temperature
temperature for which the insulation system is suitable, as defined by the thermal class in
and as used in IEC 60505
IEC 60085
3.1.2
insulation system
insulating structure containing one or more electrical insulating materials applied over con-
ducting parts employed in rotating electrical machines
[IEC 60505:2004, 3.1.1, modified]
NOTE 1 There may be several insulation components within the windings, each being designed for different
stresses in service, i.e. turn insulation, slot insulation and end-winding insulation. Different criteria may be applied
to the various components within the overall system.
NOTE 2 There may be more than one insulation system in a particular type of machine. These insulation systems
may have different thermal classes (e.g. stator and rotor windings).
3.1.3
candidate insulation system
insulation system being tested to determine its capability with respect to ageing factors
[IEC 60050-411, Amendment 1:2007, 411-39-26, modified]
3.1.4
reference insulation system
insulation system whose performance has been established by satisfactory service
experience
[IEC 60050-411, Amendment 1:2007, 411-39-27]
3.1.5
coil
one or more turns of insulated conductors connected in series and surrounded by common
insulation, arranged to link or produce magnetic flux
[IEC 60050-411:1996, 411-38-03, modified]
3.1.6
bar
either of two parts which, after placed in their slots and when connected together, will form
the complete form-wound coil (see 3.1.8) and which comprise a coil side and an appropriate
end winding
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SIST EN 60034-18-1:2011
– 8 – 60034-18-1 © IEC:2010
[IEC 60050-411:1996, 411-38-05, modified]
NOTE Large a.c. machines commonly use bars, and usually, though not always, they form single-turn coils in a
two-layer winding.
3.1.7
wire-wound winding
winding which is wound with one or several insulated conductors and in which the individual
conductors occupy random positions in the coil side
NOTE It is usually random-wound with round conductors.
[IEC 60050-411:1996, 411-38-13, modified]
3.1.8
form-wound winding
winding consisting of coils or bars which are preformed to shape, insulated and substantially
completed before they are inserted into their final places
NOTE Coils or bars are usually wound with rectangular conductors.
[IEC 60050-411:1996, 411-38-11, modified]
3.2 Terms relating to the objects being tested
3.2.1
test object
unit being tested
NOTE 1 It may be an actual machine or part thereof or a special test model (see 3.2.3 and 3.2.4) which can be
subjected to functional tests.
NOTE 2 A test object may contain more than one test specimen (see 3.2.2).
3.2.2
test specimen
individual component within a test object which can be used to generate one piece of test
data (e.g. time to failure)
NOTE A test specimen may contain more than one insulation component (e.g. turn insulation and conductor to
earth insulation), any one of which can provide that piece of data.
3.2.3
formette
special test model used for the evaluation of the insulation systems for form-wound windings
[IEC 60050-411, Amendment 1:2007, 411-53-64]
3.2.4
motorette
special test model used for the evaluation of the insulation systems for wire-wound (random-
wound) windings
[IEC 60050-411, Amendment 1:2007, 411-53-65]
3.3 Terms relating to factors of influence and ageing factors
3.3.1
factor of influence
stress imposed by conditions of operation, environment or test that may affect ageing or life of
an insulation system
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SIST EN 60034-18-1:2011
60034-18-1 © IEC:2010 – 9 –
3.3.2
ageing factor
factor of influence that causes ageing
NOTE In the winding of an electrical machine, different factors of influence or ageing factors can be dominant in
different parts (e.g. turn insulation and end-winding insulation). Therefore, different criteria may be used to assess
those parts of the insulation. It can also be appropriate to apply different procedures of functional evaluation to
these parts.
3.4 Terms relating to testing and evaluation
3.4.1
diagnostic factor
variable or fixed stress applied to an insulation component of a test specimen in order to es-
tablish its condition after ageing without significantly adding to the ageing
[IEC 60505:2004, 3.3.7, modified]
3.4.2
functional test
comparative test in which the candidate and the reference insulation systems are exposed to
ageing and diagnostic factors in order to qualify
...
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