1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationRotating electrical machinesPart 18-32: Functional evaluation of insulation systems Test procedures for form-wound windings Evaluation by electrical enduranceBS EN 60034-18-32:20
2、10National forewordThis British Standard is the UK implementation of EN 60034-18-32:2010. It isidentical to IEC 60034-18-32:2010.The UK participation in its preparation was entrusted to Technical CommitteePEL/2, Rotating electrical machinery.A list of organizations represented on this committee can
3、be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2011ISBN 978 0 580 63516 8ICS 29.080.30; 29.160.01Compliance with a British Standard cannot confer immunity fromlegal
4、obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 28 February 2011.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60034-18-32:2010EUROPEAN STANDARD EN 60034-18-32 NORME EUROPENNE EUROPISCHE NORM D
5、ecember 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means
6、reserved worldwide for CENELEC members. Ref. No. EN 60034-18-32:2010 E ICS 29.160 Supersedes CLC/TR 60034-18-32:2004English version Rotating electrical machines - Part 18-32: Functional evaluation of insulation systems - Test procedures for form-wound windings - Evaluation by electrical endurance (I
7、EC 60034-18-32:2010) Machines lectriques tournantes - Partie 18-32: Evaluation fonctionnelle des systmes disolation - Procdures dessai pour enroulements prforms - Evaluation par endurance lectrique (CEI 60034-18-32:2010) Drehende elektrische Maschinen - Teil 18-32: Funktionelle Bewertung von Isolier
8、systemen - Prfverfahren fr Wicklungen mit vorgeformten Elementen - Bewertung der elektrischen Lebensdauer (IEC 60034-18-32:2010) This European Standard was approved by CENELEC on 2010-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
9、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 of
10、ficial 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 co
11、mmittees 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
12、and the United Kingdom. BS EN 60034-18-32:2010EN 60034-18-32:2010 - 2 - Foreword The text of document 2/1580/CDV, future edition 1 of IEC 60034-18-32, prepared by IEC TC 2, Rotating machinery, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60034-18-32 on 2010-12-01.
13、 This European Standard supersedes CLC/TR 60034-18-32:2004. The main technical changes with regard to CLC/TR 60034-18-32:2004 are as follows: a) simplification of clauses; b) reduction in the number of test procedures; c) inclusion of full bars and coils as test objects; d) a new clause dealing with
14、 failures and failure criteria. 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
15、EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-12-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text o
16、f the International Standard IEC 60034-18-32:2010 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC/TS 60034-18-33 NOTE Harmonized as CLC/TS 60034-18-331). IEC/TS 6
17、0034-18-42 NOTE Harmonized as CLC/TS 60034-18-421). _ 1)At draft stage. BS EN 60034-18-32:2010- 3 - EN 60034-18-32:2010 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the
18、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 rele
19、vant EN/HD applies. Publication Year Title EN/HD Year IEC 60034-1 (mod) - Rotating electrical machines - Part 1: Rating and performance EN 60034-1 - IEC 60034-15 2009 Rotating electrical machines - Part 15: Impulse voltage withstand levels of form-wound stator coils for rotating a.c. machines EN 600
20、34-15 2009 IEC 60034-18-1 2010 Rotating electrical machines - Part 18-1: Functional evaluation of insulation systems - General guidelines EN 60034-18-1 2010 BS EN 60034-18-32:201060034-18-32 IEC:2010 CONTENTS INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 General con
21、siderations.7 4.1 Relationship to Part 1 of IEC 60034-187 4.2 Selection and designation of test procedures 7 4.3 Reference insulation system7 4.4 Test procedures (IEC 61251).8 4.5 Extent of tests .8 5 Test objects9 5.1 Construction of test objects .9 5.2 Number of turns 9 5.3 Number of test specimen
22、s .9 5.4 Initial quality control tests9 6 Electrical ageing.9 6.1 Voltage levels and intended test lives9 6.2 Test temperatures during electrical endurance testing . 10 6.3 Ageing procedure for the mainwall insulation. 10 6.4 Ageing procedure for the turn insulation 10 6.5 Maintenance of stress grad
23、ing coatings. 10 7 Diagnostic sub-cycle 11 7.1 General .11 7.2 Voltage tests .11 7.3 Other diagnostic tests11 8 Failures 11 8.1 Failure location and verification .11 8.2 Failed specimen observations .12 8.3 Dimensional measurements.12 9 Functional evaluation of the data 12 9.1 General .12 9.2 Full e
24、valuation.12 9.3 Reduced evaluation.14 9.4 Recommended data to be recorded .15 Bibliography17 Figure 1 Comparison of ageing data from candidate (C) and reference (R) insulation systems showing qualification .13 Figure 2 Comparison of ageing data from candidate and reference insulation systems showin
25、g failure to qualify 14 Figure 3 Comparison of reduced evaluation test data from four separate candidate systems with that from the reference system.15 Table 1 Test procedure designations .7 BS EN 60034-18-32:201060034-18-32 IEC:2010 5 INTRODUCTION Part 1 of IEC 60034-18 presents general principles
26、for the evaluation of insulation systems used in rotating electrical machines. This standard deals exclusively with insulation systems for form-wound windings and concentrates on electrical functional evaluation. BS EN 60034-18-32:2010 6 60034-18-32 IEC:2010 ROTATING ELECTRICAL MACHINES Part 18-32:
27、Functional evaluation of insulation systems Test procedures for form-wound windings Evaluation by electrical endurance 1 Scope This part of IEC 60034-18 describes test procedures for the evaluation of electrical endurance of insulation systems for use in a.c. or d.c. rotating electrical machines usi
28、ng form-wound windings. The test procedures are comparative in nature, such that the performance of a candidate insulation system is compared to that of a reference insulation system with proven service experience. The test procedures are principally directed at the insulation systems in air-cooled
29、machines but may also be used for evaluating parts of the insulation systems in hydrogen cooled machines. Note that the qualification procedures of inverter duty insulation systems for form-wound windings can be found in IEC 60034-18-42. 2 Normative references The following referenced documents are
30、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 60034-15:20
31、09, 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 in-sulation systems General guidelines 3 Terms and definitions For the purposes of th
32、is document, the following terms and definitions apply. 3.1 mainwall insulation main electrical insulation that separates the conductors from the earthed stator/rotor core in motor and generator windings 3.2 turn insulation electrical insulation that covers each conductor in coils/bars 3.3 interturn
33、 insulation electrical insulation that separates the conductor turns from each other in coils/bars 3.4 corona protection material material which is used to coat a stator coil/bar within the slot portion of the stator core to avoid slot discharges BS EN 60034-18-32:201060034-18-32 IEC:2010 7 3.5 stre
34、ss grading material material generally having a non-linear resistivity characteristic, applied to the endwindings of stators to reduce the maximum surface electrical stress 4 General considerations 4.1 Relationship to Part 1 of IEC 60034-18 The principles of Part 1 of IEC 60034-18 should be followed
35、 unless the recommendations of this International Standard indicate otherwise. 4.2 Selection and designation of test procedures One or more of the procedures in this International Standard should be suitable for the majority of evaluations. Evaluation is usually performed by the manufacturer of the
36、machine/coils or by a third party laboratory. It is the manufacturers responsibility to justify the most suitable procedure in Table 1 on the basis of past experience and knowledge of the insulation systems to be compared. The test procedure should be selected from Table 1 and designated by IEC 6003
37、4-18-32 procedure N, where N is the designation given in the Table 1. Subclauses 4.3, 4.4 and 4.5 give guidance on how to select the test procedure. Table 1 Test procedure designations Applied ageing voltage Diagnostic tests Designation of test procedure N Mainwall insulation (6.3) Interturn insulat
38、ion (6.4) Mainwall insulation (7.2.1) Interturn insulation (7.2.2 or 7.2.3) Stress grading (7.3) AA Constant None Not required (A) No test (A) Optional (D) CA Constant None Other test (C) No test (A) Optional (D) AB Constant Yes Not required (A) Impulse test (B) Optional (D) NOTE 1 The meaning of th
39、e letters of the diagnostic test are as follows: A No test; B Impulse test; C Other test (such as dissipation factor and partial discharge tests); D Visual observation. NOTE 2 Where a diagnostic test is not required on the mainwall insulation, the ageing voltage acts simultaneously as the diagnostic
40、 factor. All the above tests are carried out at room temperature. However, if they are to be performed at any other temperature (see 6.2.2), the designation of the test procedure shall include the Celsius temperature in brackets, e.g. AA(190). Each of the procedures may be used for the full evaluati
41、on according to 4.5.1 or for the reduced evaluation according to 4.5.2. Procedure AA is the preferred choice if the manufacturer has no past experience or knowledge of the candidate system and the behaviour of the mainwall insulation is defined. 4.3 Reference insulation system A reference insulation
42、 system should be tested using a test procedure equivalent to that used for the candidate system (see IEC 60034-18-1). The reference insulation system should have service experience at not less than 75 % of the intended maximum rated voltage of the candidate system. When extrapolation of the insulat
43、ion thickness is used, some information should be provided showing the correlation between electrical lifetime and electrical stress for the different insulation thicknesses. BS EN 60034-18-32:2010 8 60034-18-32 IEC:2010 4.4 Test procedures (IEC 61251) 4.4.1 General Electrical ageing tests are usual
44、ly performed at fixed voltage levels until failure. From such tests, characteristic times to failure at each voltage level are obtained. The results for both the candidate system and the reference system should be reported on a graph, as shown by the example in Figure 1, and compared. There is no pr
45、oven physical basis for extrapolation of this characteristic to the service voltage level UN/ 3 , where UNis the r.m.s. rated phase to phase voltage. Statistical evaluation of the results of testing should be performed according to IEC 62539. 4.4.2 Electrical ageing of the mainwall insulation In ser
46、vice, electrical ageing of the mainwall insulation is primarily caused by continuous elec-trical stress at power frequency. In addition, the insulation is required to withstand transient over-voltages arising from switching surges or inverter supply. The ability of the mainwall insulation to withsta
47、nd transient over-voltages from converter supplies may be demonstrated by the systems performance using IEC 60034-18-42. This standard describes voltage ageing of the mainwall insulation, carried out at power frequency or at a frequency up to 10 times greater. 4.4.3 Electrical ageing of the turn ins
48、ulation Electrical ageing of the turn insulation can arise due to the steady-state stress applied across the mainwall insulation. This could be particularly significant at the edges of the conductors where the electrical stress reaches a maximum. Where multiturn coils or bars are used, the power fre
49、quency voltage between turns is sufficiently low that ageing due to this electric stress is not of major significance. However, steep-fronted surges on the winding caused by switching and other disturbances can generate sufficient stress between turns for ageing to take place. Since the waveforms and frequency of occurrence are variable and dependent upon circuit parameters, this International Standard recommends that, for comparison purposes, electrical ageing
