1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Components for low-voltage surge protective devicesPart 331: Performance requirements and test methods for metal oxide varistors (MOV) (IEC 61643-331:2017)BS EN IEC 61643-331:2018EUROPEAN STANDARD NORME EUROPENNE EUROPI
2、SCHE NORM EN IEC 61643-331 March 2018 ICS 31.040 Supersedes EN 61643-331:2003 English Version Components for low-voltage surge protective devices - Part 331: Performance requirements and test methods for metal oxide varistors (MOV) (IEC 61643-331:2017) Composants pour protection par parafoudres bass
3、e tension - Partie 331: Exigences de performance et mthodes dessai pour les varistances oxyde mtallique (MOV) (IEC 61643-331:2017) Bauelemente fr berspannungsschutzgerte fr Niederspannung - Teil 331: Leistungsanforderungen und Prfverfahren fr Metalloxidvaristoren (MOV) (IEC 61643-331:2017) This Euro
4、pean Standard was approved by CENELEC on 2018-01-11. 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 reference
5、s 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 CEN
6、ELEC 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 Yugosla
7、v Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical
8、 Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No.
9、 EN IEC 61643-331:2018 E National forewordThis British Standard is the UK implementation of EN IEC 61643-331:2018. It is identical to IEC 61643-331:2017. It supersedes BS EN 61643-331:2003, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/37/1, Surg
10、e Arresters - Low Voltage.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 British Standards Institution 20
11、18 Published by BSI Standards Limited 2018ISBN 978 0 580 85757 7ICS 29.120.50; 31.040.01; 31.040.20Compliance 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 on 30 April 2018.
12、Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN IEC 61643-331:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IEC 61643-331 March 2018 ICS 31.040 Supersedes EN 61643-331:2003 English Version Components for low-voltage surge protective devices - Part 331
13、: Performance requirements and test methods for metal oxide varistors (MOV) (IEC 61643-331:2017) Composants pour protection par parafoudres basse tension - Partie 331: Exigences de performance et mthodes dessai pour les varistances oxyde mtallique (MOV) (IEC 61643-331:2017) Bauelemente fr berspannun
14、gsschutzgerte fr Niederspannung - Teil 331: Leistungsanforderungen und Prfverfahren fr Metalloxidvaristoren (MOV) (IEC 61643-331:2017) This European Standard was approved by CENELEC on 2018-01-11. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi
15、tions 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 ex
16、ists 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 na
17、tional 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, P
18、ortugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la S
19、cience 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 61643-331:2018 E BS EN IEC 61643-331:2018EN IEC 61643-331:2018 (E) 2 European foreword The text of document 37B/160/FDIS future edition 2 of IEC 616
20、43-331, prepared by IEC/SC 37B: “Specific components for surge arresters and surge protective devices”, of IEC/TC 37: “Surge arresters”, was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61643-331:2018. The following dates are fixed: latest date by which the document h
21、as to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2018-10-11 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2021-01-11 This document supersedes EN 61643-331:2003. Attention is drawn to
22、 the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61643-331:2017 was approved by CENELEC as a European Sta
23、ndard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60068-2-6:2007 NOTE Harmonized as EN 60068-2-6:2008 (not modified). IEC 60068-2-14:2009 NOTE Harmonized as EN 6008-2-14:2009 (not modified). IEC 60068-2-29
24、:1987 NOTE Harmonized as EN 6008-2-29:1993 (not modified). IEC 60068-2-52:1996 NOTE Harmonized as EN 6008-2-52:1996 (not modified). IEC 60060-1:2010 NOTE Harmonized as EN 60060-1:2010 (not modified). IEC 61643-11:2011 NOTE Harmonized as EN 61643-11:2012 (not modified). IEC 61051-1:2007 NOTE Harmoniz
25、ed as EN 61051-1:2008 (not modified). BS EN IEC 61643-331:2018EN IEC 61643-331:2018 (E) 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents are referred to in the text in such a way that some or all of their
26、 content constitutes requirements 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 1 Where an International Publication has been modified by common modifications, ind
27、icated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60068-1 2013 Environmental testing - Part 1: General and guidance EN 60068-1 2014
28、IEC 60068-2-20 2008 Environmental testing - Part 2-20: Tests - Test T: Test methods for solderability and resistance to soldering heat of devices with leads EN 60068-2-20 2008 IEC 60068-2-21 2006 Environmental testing - Part 2-21: Tests - Test U: Robustness of terminations and integral mounting devi
29、ces EN 60068-2-21 2006 IEC 60068-2-78 2012 Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state EN 60068-2-78 2013 IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic discharge immunity test EN 61000-4-2 2009 I
30、EC 61643-11 (mod) 2011 Low-voltage surge protective devices - Part 11: Surge protective devices connected to low-voltage power systems - Requirements and test methods EN 61643-11 2012 - - + A11 2018 BS EN IEC 61643-331:2018This page deliberately left blankIEC 61643-331 Edition 2.0 2017-12 INTERNATIO
31、NAL STANDARD Components for low-voltage surge protective devices Part 331: Performance requirements and test methods for metal oxide varistors (MOV) INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.040.20 ISBN 978-2-8322-5095-2 Registered trademark of the International Electrotechnical Commission Wa
32、rning! Make sure that you obtained this publication from an authorized distributor. IEC 61643-331 Edition 2.0 2017-12 INTERNATIONAL STANDARD Components for low-voltage surge protective devices Part 331: Performance requirements and test methods for metal oxide varistors (MOV) INTERNATIONAL ELECTROTE
33、CHNICAL COMMISSION ICS 31.040.20 ISBN 978-2-8322-5095-2 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colourinsideBS EN IEC 61643-331:2018 2 IEC 61643-331:2017 IEC 2017 CONTENTS CONTENTS 2 F
34、OREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms, definitions, symbols and abbreviated terms 7 3.1 Ratings . 8 3.2 Characteristics 9 3.3 Symbols 10 3.4 Abbreviated terms . 11 4 Service conditions . 11 4.1 Operating and storage temperature ranges . 11 4.2 Altitude or atmospheric pressure range
35、. 11 4.3 Relative Humidity 11 5 Mechanical requirements and materials . 12 5.1 Robustness of terminations . 12 5.2 Solderability 12 5.3 Marking . 12 6 General . 12 6.1 Failure rates . 12 6.2 Test standard atmospheric conditions . 12 7 Electrical requirements 12 7.1 Nominal varistor voltage . 12 7.2
36、Maximum AC (DC) continuous operating voltage. 13 7.3 Standby current IDC. 13 7.4 Capacitance 13 7.5 Clamping voltage 13 7.6 Electrostatic discharge (ESD) (for SMD type MOV only) 15 7.7 Rated impulse energy (WTM) . 15 7.8 Nominal discharge current In15 7.9 Endurance 15 7.10 Limited current temporary
37、overvoltage 15 8 Standard design test criteria 15 8.1 General . 15 8.2 Ratings . 15 8.2.1 Single-impulse maximum current (ITM) 15 8.2.2 Next Impulse . 16 8.2.3 Continuous rated voltage (VM) . 16 8.3 Electrical characteristics . 16 8.3.1 Clamping voltage (VC) . 16 8.3.2 Standby current (ID) 17 8.3.3
38、Nominal varistor voltage (VN) 17 8.3.4 Capacitance (CV) 17 8.4 Endurance 18 8.5 ESD Test Method 18 9 Nominal discharge current and limited current temporary overvoltage 18 BS EN IEC 61643-331:2018IEC 61643-331:2017 IEC 2017 3 9.1 Thermally protected varistors Sequence of tests 18 9.2 Temperature and
39、 humidity cycle conditioning 18 9.3 Nominal discharge current I(n) test description . 19 9.3.1 General . 19 9.3.2 Pass/fail criteria . 21 9.4 Limited current temporary overvoltage test description and procedure for thermally protected varistors . 21 9.4.1 General . 21 9.4.2 Sample preparation . 21 9
40、.4.3 Test conditions 21 9.4.4 Pass/fail criteria . 22 9.5 Dielectric testing . 24 9.5.1 Test conditions 24 9.5.2 Setup from foil to leads 24 9.5.3 Pass criteria 24 Annex A (informative) MOV testing according to IEC 61643-11:2011 Surge protective devices for the Class I, II and III 25 A.1 General . 2
41、5 A.2 MOV selection 25 A.3 Cross reference list of abbreviations, descriptions and definitions . 25 A.4 Operating duty test . 26 A.4.1 General . 26 A.4.2 Measured limiting voltage 28 A.4.3 Class I and II operating duty tests (8.3.4.3) . 31 A.4.4 Additional duty test for test class I . 31 A.4.5 Class
42、 III operating duty tests . 32 A.4.6 Pass criteria for all operating duty tests and for the additional duty test for test class I 33 A.4.7 Preferred parameters of impulse discharge current Iimpused for Class I additional duty tests . 33 A.4.8 Preferred values of impulse discharge current Inused for
43、Class I and Class II residual voltage and operating duty tests 33 A.4.9 Preferred values of combination waveshape used for Class III tests 34 Annex B (informative) IEC 61051 Varistors for use in electronic equipment . 36 Annex C (informative) Accelerated endurance screening test . 37 C.1 Accelerated
44、 endurance screening test 37 C.2 Preparation of sample . 37 C.3 Test conditions . 37 C.4 Pass criteria 38 Annex D (informative) Proposed test method for determination of mean time to failure (MTTF) 39 D.1 Sampling plans . 39 D.2 Total test hours . 39 D.3 Samples 39 D.4 Intermediate measurements 40 D
45、.5 Failure criteria . 40 D.6 Acceptance criteria . 40 Bibliography 41 BS EN IEC 61643-331:2018 4 IEC 61643-331:2017 IEC 2017 Figure 1 V-I characteristic of a MOV 10 Figure 2 Symbol for MOV . 10 Figure 3 Symbol for thermally protected MOV 11 Figure 4 Test circuit for impulse peak current clamping vol
46、tage (VC) at peak impulse current (IP) . 16 Figure 5 Test circuit for measuring leakage current 17 Figure 6 Test circuit for measuring nominal varistor voltage (VV) . 17 Figure 7 Nominal Discharge Current Flowchart 20 Figure 8 Sequence of the InTest . 21 Figure 9 Temporary Overvoltage Limited Curren
47、t test procedure Flowchart 23 Figure A.1 Flow chart of the operating duty test . 27 Figure A.2 Test set-up for operating duty test 28 Figure A.3 Flow chart of testing to determine the measured limiting voltage . 30 Figure A.4 Operating duty test timing diagram for test classes I and II . 31 Figure A
48、.5 Additional duty test timing diagram for test class I 32 Figure A.6 Operating duty test timing diagram for test class III . 32 Figure C.1 Circuit of accelerated ageing test 37 Figure D.1 Test Circuit of MTTF . 40 Table 1 Voltage ratings for disc types 13 Table 2 Typical Voltage Ratings for SMD typ
49、es 14 Table A.1 Comparison of IEC 61643-11 and IEC 61643-311 26 Table A.2 Preferred parameters for class I test 33 Table A.3 Preferred values for class I and class II tests . 34 Table A.4 Preferred values for class III tests 35 Table D.1 Sampling plans 39 BS EN IEC 61643-331:2018IEC 61643-331:2017 IEC 2017 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES Part 331: Performance requirement
