1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationRotating electrical machinesPart 18-31: Functional evaluation of insulation systems Test procedures for form-wound windings Thermal evaluation and classification of insulation sy
2、stems used in rotating machinesBS EN 60034-18-31:2012National forewordThis British Standard is the UK implementation of EN 60034-18-31:2012. It is identical to IEC 60034-18-31:2012. It supersedes BS EN 60034-18-31:1994 which is withdrawn.The UK participation in its preparation was entrusted to Techn
3、ical Committee PEL/2, Rotating electrical machinery.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The Britis
4、h Standards Institution 2012Published by BSI Standards Limited 2012 ISBN 978 0 580 63674 5 ICS 29.080.30; 29.160.01 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee
5、on 30 September 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60034-18-31:2012EUROPEAN STANDARD EN 60034-18-31 NORME EUROPENNE EUROPISCHE NORM August 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electro
6、technique Europisches Komitee fr 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 +
7、A1:1996English 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 lectriques tournantes - Part
8、ie 18-31: Evaluation fonctionnelle des systmes disolation - Procdures dessai pour enroulements prforms - Evaluation thermique et classification des systmes disolation utiliss dans les machines tournantes (CEI 60034-18-31:2012) Drehende elektrische Maschinen - Teil 18-31: Funktionelle Bewertung von I
9、soliersystemen - Prfverfahren fr Wicklungen mit vorgeformten Elementen - Thermische Bewertung und Klassifizierung von Isoliersystemen fr 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 In
10、ternal 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 a
11、ny 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 o
12、fficial 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, Luxembour
13、g, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 60034-18-31:2012EN 60034-18-31:2012 - 2 - Foreword The text of document 2/1662/FDIS, future edition 2 of IEC 60034-18-31, prepared by IEC/TC 2 “Rotating
14、machinery“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60034-18-31:2012. 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 lates
15、t 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 t
16、he 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 f
17、or 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
18、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.BS EN 60034-18-31:2
19、012- 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 reference
20、s, 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
21、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 600
22、34-18-1 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 tes
23、t 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 6
24、0216-1 - 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
25、insulating material EN 60216-5 - IEC 60505 - Evaluation and qualification of electrical insulation systems EN 60505 - BS EN 60034-18-31:2012 2 60034-18-31 IEC:2012 CONTENTS INTRODUCTION . 6 1 Scope . 7 2 Normative references . 7 3 General considerations . 8 3.1 Reference insulation system 8 3.2 Test
26、 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 1
27、0 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
28、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: Qua
29、lification 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
30、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 BS EN 60034-18-31:201260034-18-31 IEC:2012 3 Figure 1 Candidate
31、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 Fi
32、gure 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 . 26 Table 1
33、Thermal classes 10 Table 2 Recommended temperatures and ageing sub-cycle exposure periods . 11 Table 3 Conditions for qualification of candidate system 16 BS EN 60034-18-31:2012 6 60034-18-31 IEC:2012 INTRODUCTION IEC 60034-18 comprises several parts, dealing with different types of functional evalu
34、ation 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. The subsequent parts IEC 60034-18-21, IEC 60034-18-31, IEC 60034-18-32, IEC 60034-18-33, IEC 60034-18-34, IEC
35、 60034-18-41 and IEC 60034-18-42 give detailed procedures for the various types of windings. IEC 60034-18-31 describes thermal evaluation and classification of insulation systems for form-wound windings. It provides standard thermal ageing techniques and diagnostic test procedures. Parts relevant to
36、 this document are: IEC 60034-18-1: General guidelines IEC 60034-18-21: Test procedures for wire-wound windings IEC 60034-18-41: Qualification and type tests for Type I electrical insulation systems used in rotating electrical machines fed from voltage converters IEC 60034-18-42: Qualification and a
37、cceptance tests for partial discharge resistant electrical insulation systems (Type II) electrical insulation systems used in rotating electrical machines fed from voltage converters BS EN 60034-18-31:201260034-18-31 IEC:2012 7 ROTATING ELECTRICAL MACHINES Part 18-31: Functional evaluation of insula
38、tion systems Test procedures for form-wound windings Thermal evaluation and classification of insulation systems used in rotating machines 1 Scope This part of IEC 60034 describes thermal endurance test procedures for classification of insulation systems used in a.c. or d.c. rotating electrical mach
39、ines with indirect cooling and form-wound windings. The test performance of a candidate insulation system is compared to the test performance of a reference insulation system with proven service experience. The test procedures described in IEC 60034-18-31 are intended to compare the thermal enduranc
40、e 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 test is not intended to simulate the in-service mechanical stresses experienced by the endwinding bracing or support materials. It does
41、 not include the evaluation of thermo-mechanical deterioration by expansion and contraction of insulation during temperature cycling. IEC 60034-18-1 describes general testing principles applicable to thermal endurance testing of insulation systems used in rotating electrical machines. The principles
42、 of IEC 60034-18-1 are followed unless otherwise stated in IEC60034-18-31. The thermal class for the insulation system refers to its maximum allowed (“hot spot”) temperature. The average temperature measured in service should not exceed the allowed temperature rise according to IEC 60034-1. NOTE 1 L
43、arge machines, especially synchronous generators using bars, may require special thermal evaluation test procedures which are not included in this part. NOTE 2 Recommended parameters for the diagnostic test may be applied according to IEC 60034-18-42 to form-wound coils designed with Type II insulat
44、ion systems for use in converter applications. 2 Normative references 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
45、of the referenced document (including any amendments) applies. IEC 60034-15:2009, Rotating electrical machines Part 15: Impulse voltage withstand levels of form-wound stator coils for rotating a.c. machines IEC 60034-18-1:2010, Rotating electrical machines Part 18-1: Functional evaluation of insulat
46、ion systems General guidelines BS EN 60034-18-31:2012 8 60034-18-31 IEC:2012 IEC 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 conv
47、erters IEC 60060-1, High-voltage test techniques Part 1: General definitions and test requirements IEC 60085, Electrical Insulation Thermal evaluation and designation IEC 60216-1, Electrical insulating materials Properties of thermal endurance Part 1: Ageing procedures and evaluation of test results
48、 IEC 60216-4-1, Electrical insulating materials Thermal endurance properties Part 4-1: Ageing ovens Single-chamber ovens IEC 60216-5, Electrical insulating materials Thermal endurance properties Part 5: Determination of relative thermal endurance index (RTE) of an insulating material IEC 60505, Eval
49、uation and qualification of electrical insulation systems 3 General considerations 3.1 Reference insulation system A reference insulation system, as described in 4.3 of IEC 60034-18-1, shall be tested using the same procedure as that used for the candidate system. Acceptable service life of a low voltage system does not automatically qualify a high voltage (HV) system, especially since HV systems usually feature additional materials: for example corona s
