1、Components for low-voltagesurge protective devicesPart 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)BS EN 61643-351:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National foreword
2、This British Standard is the UK implementation of EN 61643-351:2017. It isidentical to IEC 61643-351:2016.The UK participation in its preparation was entrusted by TechnicalCommittee PEL/37, Surge Arresters - High Voltage, to SubcommitteePEL/37/1, Surge Arresters - Low Voltage.A list of organizations
3、 represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978
4、0 580 85903 8ICS 33.040.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH
5、 STANDARDBS EN 61643-351:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61643-351 February 2017 ICS 33.040.99 English Version Components for low-voltage surge protective devices - Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolat
6、ion transformers (SIT) (IEC 61643-351:2016) Composants pour parafoudres basse tension - Partie 351: Exigences de performance et mthodes dessai pour les transformateurs disolement contre les surtensions dans les rseaux de signalisation et de tlcommunications (IEC 61643-351:2016) Bauelemente fr berspa
7、nnungsschutzgerte fr Niederspannung - Teil 351: Leistungsanforderungen sowie Prfschaltungen und -verfahren fr Blitzisoliertransformatoren in Telekommunikations- und signalverarbeitenden Netzen (IEC 61643-351:2016) This European Standard was approved by CENELEC on 2016-12-02. CENELEC members are boun
8、d 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 CE
9、N-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
10、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,
11、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 Standardization Comit Europen de Normalisation Electrotechnique Europisches
12、Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 61643-351:2017 E BS EN 61643-351:2017EN 61643-351:2017 2 European foreword Th
13、e text of document 37B/155/FDIS, future edition 1 of IEC 61643-351, prepared by 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 61643-351:2017. The following date
14、s 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) 2017-09-02 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-12-02 Attention is draw
15、n 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 61643-351:2016 was approved by CENELEC as
16、 a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60060-1:2010 NOTE Harmonized as EN 60060-1:2010 (not modified). IEC 60068-2-1:2007 NOTE Harmonized as EN 60068-2-1:2007 (not modified). IEC
17、60068-2-2:2007 NOTE Harmonized as EN 60068-2-2:2007 (not modified). IEC 60076-1 NOTE Harmonized as EN 60076-1. IEC 60721-3-9:1993 NOTE Harmonized as EN 60721-3-9:1993 (not modified). IEC 61340-4-8 NOTE Harmonized as EN 61340-4-8. IEC 61558-1 NOTE Harmonized as EN 61558-1. IEC 61558-2-4 NOTE Harmoniz
18、ed as EN 61558-2-4. IEC 61558-2-6 NOTE Harmonized as EN 61558-2-6. BS EN 61643-351:2017EN 61643-351:2017 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced i
19、n 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 1 When an International Publication has been modified by common modification
20、s, indicated 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 60721-3-3 - Classification of environmental conditions - Part 3: Classificati
21、on of groups of environmental parameters and their severities - Section 3: Stationary use at weatherprotected locations EN 60721-3-3 - IEC/TR 60664-2-1 2011 Insulation coordination for equipment within low-voltage systems - Part 2-1: Application guide - Explanation of the application of the IEC 6066
22、4 series, dimensioning examples and dielectric testing - - BS EN 61643-351:2017 2 IEC 61643-351:2016 IEC 2016 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms, definitions, symbols, abbreviations and acronyms 7 3.1 Terms and definitions 7 3.2 Symbols 10 3.3 Abbreviat
23、ions and acronyms . 12 4 Service conditions . 12 4.1 Temperature range . 12 4.2 Humidity . 12 4.3 Altitude . 12 4.4 Microclimate . 12 5 SIT surge conditions 13 5.1 SIT surge mitigation 13 5.2 Common-mode surges 14 5.3 Differential-mode surges . 14 6 Characteristics 15 6.1 Characteristic measurement
24、. 15 6.2 Input winding to output winding capacitance . 15 6.3 Insulation resistance (IR) 16 6.4 Signal SIT voltage-time product 18 7 Ratings 19 7.1 Rated impulse withstand voltage . 19 7.2 Signal SIT rated winding direct current 22 8 Identification 24 8.1 General . 24 8.2 Datasheet . 24 8.3 Marking
25、. 24 Annex A (informative) 1,2/50 impulse 25 Bibliography 26 Figure 1 Symbol for two-winding SIT 10 Figure 2 Symbol for a two-winding SIT with polarity indication . 11 Figure 3 Symbol for a two-winding SIT with electric screen 11 Figure 4 SIT with centre tapped windings . 11 Figure 5 Common-mode sur
26、ge conditions for SIT . 13 Figure 6 Common-mode surge conditions for SIT with an electric screen . 14 Figure 7 Test circuit to measure SIT internal-winding capacitance . 15 Figure 8 Test circuit to measure the internal-winding capacitance of SIT with an electric screen 16 Figure 9 Test circuit to me
27、asure the insulation resistance of SIT 17 Figure 10 Test circuit to measure the insulation resistance of SIT with an electric screen 17 Figure 11 Test circuit to measure SIT voltage-time product 18 BS EN 61643-351:2017IEC 61643-351:2016 IEC 2016 3 Figure 12 Generator and SIT secondary voltage wavefo
28、rms . 18 Figure 13 SIT rated impulse voltage test circuit 19 Figure 14 Rated impulse voltage test circuit for SIT with an electric screen 20 Figure 15 Construction of pass/fail template from the 1,2/50 open-circuit waveform . 20 Figure 16 Pass/fail template and test waveforms . 21 Figure 17 Winding
29、conductor temperature rise test circuit 23 Figure A.1 1,2/50 time periods and voltage amplitudes 25 Table 1 Classification of microclimate condition . 12 Table 2 Impulse withstand test voltage for rated impulse voltage . 22 Table A.1 1,2/50 voltage impulse generator parameters . 25 BS EN 61643-351:2
30、017 4 IEC 61643-351:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) FOREWORD 1) The International Electro
31、technical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To
32、 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC Natio
33、nal Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (IS
34、O) 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 f
35、rom all interested 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
36、held responsible for the way in which they are used or for any misinterpretation 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
37、 divergence between 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
38、 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 individua
39、l 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 expenses arising out of the publication, use of, or reliance upon, this
40、 IEC Publication or any other IEC Publications. 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
41、 IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61643-351 has been prepared by subcommittee 37B: Specific components for surge arresters and surge protective devices, of IEC technical co
42、mmittee 37: Surge arresters. The text of this standard is based on the following documents: FDIS Report on voting 37B/155/FDIS 37B/156/RVD Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table. This document h
43、as been drafted in accordance with the ISO/IEC Directives, Part 2. BS EN 61643-351:2017IEC 61643-351:2016 IEC 2016 5 A list of all parts in the IEC 61643 series, published under the general title Components for low-voltage surge protective devices, can be found on the IEC website. Future standards i
44、n this series will carry the new general title as cited above. Titles of existing standards in this series will be updated at the time of the next edition. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under “
45、http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS EN 61643-351:2017 6 IEC 61643-351:2016 IEC 2016 INTRODUCTION This part of IEC 61643 covers surge isolation transformers whose
46、rated impulse withstand voltage coordinates with the expected surge environment of the installation. This type of surge protective component, SPC, isolates and attenuates transient voltages in conjunction with current diverting components (e.g. GDT, MOV, etc.) or surge protective devices (SPDs). It
47、can be used in SPDs. BS EN 61643-351:2017IEC 61643-351:2016 IEC 2016 7 COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTION Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) 1 Scope Surge isolation transformers (SITs) are used
48、 for signal transformer applications with signal levels up to 400 V peak to peak. SITs are transformers, with or without an internal-winding screen, with a rated impulse withstand voltage greater than the peak voltage of the expected common-mode surge environment. SITs are applicable to components f
49、or surge protection against indirect and direct effects of lightning or other transient overvoltage. SITs are used to mitigate the onward propagation of common-mode voltage surges. This part of IEC 61643 defines test circuits and test methods for determining and verifying the SIT surge parameters. Preferred performance values for key parameters are given. This part of IEC 61643 does not cover SIT operation under differential-mode lightning surge condit
