EN 60034-18-31:2012

Rotating electrical machines - Part 18-31: Functional evaluation of insulation systems - Test procedures for form-wound windings - Thermal evaluation and classification of insulation systems used in rotating machines

IEC 60034-18-31:2012 describes thermal endurance test procedures for classification of insulation systems used in a.c. or d.c. rotating electrical machines with indirect cooling and form-wound windings. These test procedures are intended to compare the thermal endurance performance of the mainwall insulation between conductor(s) and ground and, where required by the design of the coil or bar, the insulation between the turns. The main technical changes with regard to the previous edition include: - Definition of the test method and sub-cycles required to establish a consistent standardized platform for thermal ageing of insulation systems for form-wound windings. - Recommendations for establishing a thermal life curve based on confidence intervals. - Comparison of candidate and reference system performance for specific requirements of thermal class, within feasible limits. Keywords: rotating machinery, insulation systems

Drehende elektrische Maschinen - Teil 18-31: Funktionelle Bewertung von Isoliersystemen - Prüfverfahren für Wicklungen mit vorgeformten Elementen - Thermische Bewertung und Klassifizierung von Isoliersystemen für drehende Maschinen

Machines électriques tournantes - Partie 18-31: Evaluation fonctionnelle des systèmes d'isolation - Procédures d'essai pour enroulements préformés - Evaluation thermique et classification des systèmes d'isolation utilisés dans les machines tournantes

La CEI 60034-18-31:2012 décrit les procédures d'essai d'endurance thermique pour la classification des systèmes d'isolation utilisés dans les machines électriques tournantes à courant alternatif ou continu, à refroidissement indirect et à enroulements préformés. Ces procédures d'essai permettent de comparer les performances d'endurance thermique de l'isolation principale entre le (ou les) conducteur(s) et la terre, et si requis par la conception de la bobine ou de la barre, l'isolation entre spires. Les principales modifications techniques par rapport à l'édition précédente sont les suivantes: - Définition de la méthode d'essai et des sous-cycles requis pour établir une plate-forme normalisée et cohérente applicable au vieillissement thermique des systèmes d'isolation des enroulements préformés. - Recommandations pour établir une courbe de durée de vie thermique fondée sur des intervalles de confiance. - Comparaison des performances des systèmes candidats et de référence en fonction d'exigences spécifiques de classe thermique, dans des limites réalisables. Mots clefs: machines tournantes, systèmes d'isolation.

Električni rotacijski stroji - 18-31. del: Funkcionalno vrednotenje izolacijskih sistemov - Preskusni postopki za predhodno oblikovana navitja - Toplotno vrednotenje in klasificiranje izolacijskih sistemov, ki se uporabljajo pri rotacijskih strojih (IEC 60034-18-31:2012)

Ta del standarda IEC 60034 opisuje preskusne postopke v zvezi s toplotno vzdržljivostjo za klasificiranje izolacijskih sistemov, ki se uporabljajo pri električnih rotacijskih strojih z izmenično ali enosmerno napetostjo s posrednim hlajenjem in predhodno oblikovanimi navitji. Preskusno delovanje kandidatnega izolacijskega sistema se primerja s preskusnim delovanjem referenčnega izolacijskega sistema z dokazanimi izkušnjami pri uporabi. Preskusni postopki iz standarda IEC 60034-18-31 so namenjeni primerjavi delovanja toplotne vzdržljivosti izolacije glavne stene med vodniki in tlemi ter, kadar tako zahteva zasnova tuljave ali palice, izolacija med ovoji. Preskus ni namenjen simuliranju mehanskih obremenitev končnih opornih ali podpornih materialov med delovanjem. Ne zajema vrednotenja toplotno-mehanskega propadanja zaradi širjenja in krčenja izolacije med menjavanjem temperature. Standard IEC 60034-18-1 opisuje splošna preskusna načela, ki se uporabljajo za preskušanje toplotne vzdržljivosti izolacijskih sistemov, ki se uporabljajo pri električnih rotacijskih strojih. Upoštevajo se načela standarda IEC 60034-18-1, razen če v standardu IEC 60034-18-31 ni navedeno drugače. Toplotni razred izolacijskega sistema se nanaša na njegovo najvišjo dovoljeno temperaturo (»vroča točka«). Povprečna temperatura, izmerjena med delovanjem, naj ne bi presegla dovoljenega temperaturnega dviga iz standarda IEC 60034-1.

General Information

• Status: Published
• Publication Date: 23-Aug-2012
• Withdrawal Date: 29-Jul-2015
• ICS: 29.160 - Rotating machinery
• Technical Committee: CLC/TC 2 - Rotating machinery
• Drafting Committee: IEC/TC 2 - IEC_TC_2
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 24-Aug-2012
• Completion Date: 24-Aug-2012
• Ref Project: SIST EN 60034-18-31:2012 - Rotating electrical machines - Part 18-31: Functional evaluation of insulation systems - Test procedures for form-wound windings - Thermal evaluation and classification of insulation systems used in rotating machines (IEC 60034-18-31:2012)

Relations

• Replaces: EN 60034-18-31:1994/A1:1996 - Rotating electrical machines - 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
• Effective Date: 28-Jan-2023
• Replaces: EN 60034-18-31:1994 - Rotating electrical machines - 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
• Effective Date: 28-Jan-2023

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RSORWQRMachines électriques tournantes - Partie 18-31: Evaluation fonctionnelle des systèmes d'isolation - Procédures d'essai pour enroulements préformés - Evaluation thermique et classification des systèmes d'isolation utilisés dans les machines tournantes (IEC 60034-18-31:2012)Machines électriques tournantes - Partie 18-31: Evaluation fonctionnelle des systèmes d'isolation - Procédures d'essai pour enroulements préformés - Evaluation thermique et classification des systèmes d'isolation utilisés dans les machines tournantes (CEI 60034-18-31:2012)Rotating electrical machines - Part 18-31: Functional evaluation of insulation systems - Test procedures for form-wound windings - Thermal evaluation and classification of insulation systems used in rotating machines (IEC 60034-18-31:2012)29.160.01Rotacijski stroji na splošnoRotating machinery in general29.080.30Izolacijski sistemiInsulation systemsICS:Ta slovenski standard je istoveten z:EN 60034-18-31:2012SIST EN 60034-18-31:2012en01-oktober-2012SIST EN 60034-18-31:2012SLOVENSKI
STANDARDSIST EN 60034-18-31:1999/A1:1999SIST EN 60034-18-31:19991DGRPHãþD

EUROPEAN STANDARD EN 60034-18-31 NORME EUROPÉENNE
EUROPÄISCHE NORM August 2012
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2012 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60034-18-31:2012 E
ICS 29.160 Supersedes EN 60034-18-31:1994 + A1:1996
English version
Rotating electrical machines -
Part 18-31: Functional evaluation of insulation systems -
Test procedures for form-wound windings -
Thermal evaluation and classification of insulation systems used in rotating machines (IEC 60034-18-31:2012)
Machines électriques tournantes -
Partie 18-31: Evaluation fonctionnelle des systèmes d'isolation -
Procédures d'essai pour enroulements préformés -
Evaluation thermique et classification des systèmes d'isolation utilisés dans les machines tournantes (CEI 60034-18-31:2012)
Drehende elektrische Maschinen -
Teil 18-31: Funktionelle Bewertung von Isoliersystemen -
Prüfverfahren für Wicklungen mit vorgeformten Elementen -
Thermische Bewertung und Klassifizierung von Isoliersystemen für drehende Maschinen (IEC 60034-18-31:2012)
This European Standard was approved by CENELEC on 2012-07-30. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Foreword The text of document 2/1662/FDIS, future edition 2 of IEC 60034-18-31, prepared by IEC/TC 2 "Rotating machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-04-30 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-07-30
This document supersedes EN 60034-18-31:1994 + A1:1996. EN 60034-18-31:2012 includes the following significant technical changes with respect to
EN 60034-18-31:1994 + A1:1996:
- Definition of the test method and sub-cycles required to establish a consistent standardized platform for thermal ageing of insulation systems for form-wound windings. - Recommendations for establishing a thermal life curve based on confidence intervals. - Comparison of candidate and reference system performance for specific requirements of thermal class, within feasible limits.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
Endorsement notice The text of the International Standard IEC 60034-18-31:2012 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 60034-1 NOTE
Harmonized as EN 60034-1.SIST EN 60034-18-31:2012

- 3 - EN 60034-18-31:2012 Annex ZA
(normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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 60034-15 2009 Rotating electrical machines -
Part 15: Impulse voltage withstand levels of form-wound stator coils for rotating a.c. machines EN 60034-15 2009
IEC 60034-18-1 2010 Rotating electrical machines -
Part 18-1: Functional evaluation of insulation systems - General guidelines EN 60034-18-1 2010
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 CLC/TS
60034-18-42 -
IEC 60060-1 - High-voltage test techniques -
Part 1: General definitions and test requirements EN 60060-1 -
IEC 60085 - Electrical insulation - Thermal evaluation and designation EN 60085 -
IEC 60216-1 - Electrical insulating materials - Thermal endurance properties -
Part 1: Ageing procedures and evaluation of test results EN 60216-1 -
IEC 60216-4-1 - Electrical insulating materials - Thermal endurance properties -
Part 4-1: Ageing ovens - Single-chamber ovens EN 60216-4-1 -
IEC 60216-5 - Electrical insulating materials - Thermal endurance properties -
Part 5: Determination of relative thermal endurance index (RTE) of an insulating material EN 60216-5 -
IEC 60505 - Evaluation and qualification of electrical insulation systems EN 60505 -
IEC 60034-18-31 Edition 2.0 2012-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Rotating electrical machines –
Part 18-31: Functional evaluation of insulation systems – Test procedures for form-wound windings – Thermal evaluation and classification of insulation systems used in rotating machines
Machines électriques tournantes –
Partie 18-31: Evaluation fonctionnelle des systèmes d'isolation – Procédures d'essai pour enroulements préformés – Evaluation thermique et classification des systèmes d'isolation utilisés dans les machines tournantes
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE U ICS 29.160 PRICE CODE CODE PRIX ISBN 978-2-83220-159-6
– 2 – 60034-18-31 © IEC:2012 CONTENTS
FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative references . 7 3 General considerations . 8 3.1 Reference insulation system . 8 3.2 Test procedures . 8 4 Test objects and test specimens . 9 4.1 Construction of test objects . 9 4.2 Verification of effects of minor changes in insulation systems . 9 4.3 Number of test specimens . 9 4.4 Quality control . 9 4.5 Initial diagnostic tests . 10 5 Test procedures . 10 5.1 Thermal ageing sub-cycle . 10 5.2 Ageing temperatures and sub-cycle lengths . 10 5.3 Method of heating. 11 5.4 Thermal ageing of test objects . 12 6 Diagnostic sub-cycle. 12 6.1 Conditioning procedure . 12 6.1.1 General . 12 6.1.2 Mechanical conditioning . 12 6.1.3 Moisture conditioning . 13 6.2 Diagnostic tests . 13 6.2.1 Voltage withstand test . 13 6.2.2 Method . 14 6.2.3 Mainwall insulation test. 14 6.2.4 Turn insulation test . 14 6.3 Informative tests . 15 7 Reporting and functional evaluation of data from candidate and reference systems . 15 7.1 General . 15 7.2 Determining qualification . 15 7.2.1 Overview . 15 7.2.2 Case A: Qualification for the same class temperature and same expected service life . 16 7.2.3 Case B: Qualification for the same class temperature and a different expected service life . 17 7.2.4 Case C: Qualification for a different class temperature and same expected service life . 18 7.2.5 Case D: Qualification for a different class temperature and different expected service life . 19 7.2.6 Non-linearity of regression lines . 20 7.2.7 Reduced evaluation . 20 Annex A (informative)
Example of test object (formette) construction . 22 Bibliography . 27 SIST EN 60034-18-31:2012

60034-18-31 © IEC:2012 – 3 –
Figure 1 – Candidate system qualified for the same
thermal class and the same expected service life . 17 Figure 2 – Candidate system qualified for the same
thermal class and different expected service life . 18 Figure 3 – Candidate system qualified for a different
class temperature and the same expected service life . 19 Figure 4 – Candidate system qualified for a different service life
and different thermal class from the reference . 20 Figure A.1 – Typical slot assembly . 23 Figure A.2 – Typical slot assembly . 24 Figure A.3 – Formette for testing DC armature coils . 25 Figure A.4 – Test fixture for rotor slot section .
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