1、 IEC 61643-351 Edition 1.0 2016-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Components for low-voltage surge protective devices Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) Composants pour parafoudres basse te
2、nsion Partie 351: Exigences de performance et mthodes dessai pour les transformateurs disolement contre les surtensions dans les rseaux de signalisation et de tlcommunications IEC 61643-351:2016-10(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights rese
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20、-351 Edition 1.0 2016-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Components for low-voltage surge protective devices Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) Composants pour parafoudres basse tension Part
21、ie 351: Exigences de performance et mthodes dessai pour les transformateurs disolement contre les surtensions dans les rseaux de signalisation et de tlcommunications INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 33.040.99 ISBN 978-2-8322-3717-5 Registered t
22、rademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur ag
23、r. 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 Abbreviations and acronyms . 12 4 Service conditions . 12 4.1 Temperature range . 12 4
24、.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 . 15 6.2 Input winding to output winding capacitance . 15 6.3 Insulation resi
25、stance (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 . 24 Annex A (informative) 1,2/50 impulse 25 Bibliography 26 Figure 1 Symbol
26、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 surge conditions for SIT . 13 Figure 6 Common-mode surge conditions for SIT with
27、 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 measure the insulation resistance of SIT 17 Figure 10 Test circuit to measure t
28、he insulation resistance of SIT with an electric screen 17 Figure 11 Test circuit to measure SIT voltage-time product 18 IEC 61643-351:2016 IEC 2016 3 Figure 12 Generator and SIT secondary voltage waveforms . 18 Figure 13 SIT rated impulse voltage test circuit 19 Figure 14 Rated impulse voltage test
29、 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 conductor temperature rise test circuit 23 Figure A.1 1,2/50 time periods and voltage amplitudes
30、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 4 IEC 61643-351:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ COMPONENTS FOR LOW-VOLTAGE SURGE PROTECT
31、IVE DEVICES Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT) FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical co
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42、ch 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 committee 37: Surge arresters. The text of this standard is based on the following documents: FDIS Report on voting 37B
43、/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 has been drafted in accordance with the ISO/IEC Directives, Part 2. IEC 61643-351:2016 IEC 2016 5 A list of all parts
44、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 in 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
45、 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 “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced
46、by a revised edition, or amended. 6 IEC 61643-351:2016 IEC 2016 INTRODUCTION This part of IEC 61643 covers surge isolation transformers whose rated impulse withstand voltage coordinates with the expected surge environment of the installation. This type of surge protective component, SPC, isolates an
47、d attenuates transient voltages in conjunction with current diverting components (e.g. GDT, MOV, etc.) or surge protective devices (SPDs). It can be used in SPDs. IEC 61643-351:2016 IEC 2016 7 COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTION Part 351: Performance requirements and test methods for telecom
48、munications and signalling network surge isolation transformers (SIT) 1 Scope Surge isolation transformers (SITs) are used 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 withstan
49、d voltage greater than the peak voltage of the expected common-mode surge environment. SITs are applicable to components for 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 ver
