1、 IEC TR 61641 Edition 3.0 2014-09 TECHNICAL REPORT RAPPORT TECHNIQUE Enclosed low-voltage switchgear and controlgear assemblies Guide for testing under conditions of arcing due to internal fault Ensembles dappareillage basse tension sous enveloppe Guide pour lessai en conditions darc dues un dfaut i
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19、ice Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC TR 61641 Edition 3.0 2014-09 TECHNICAL REPORT RAPPORT TECHNIQUE Enclosed low-voltage switchgear and controlgear assemblies Guide for testin
20、g under conditions of arcing due to internal fault Ensembles dappareillage basse tension sous enveloppe Guide pour lessai en conditions darc dues un dfaut interne INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE T ICS 29.130.20 PRICE CODE CODE PRIX ISBN 978-2-8322
21、-1855-6 Registered trademark 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 vi
22、a un distributeur agr. 2 IEC TR 61641:2014 IEC 2014 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 7 4 Classification of low-voltage switchgear and controlgear assemblies . 9 4.1 Classification with regard to the protection characteristic 9 4.2 Clas
23、sification with regard to persons who have access . 9 5 ASSEMBLY characteristics . 10 6 Requirements and tests for an arc ignition protected zone . 10 6.1 Constructional requirements of an arc ignition protected zone 10 6.2 Dielectric test of arc ignition protected zones 11 6.3 IP test of arc igniti
24、on protected zones . 11 7 Selection of test specimen and validity of tests for similar designs (possibilities for derivation) . 11 8 Testing Arc fault tests . 12 8.1 General . 12 8.2 Voltage . 12 8.3 Current . 13 8.4 Frequency . 13 8.5 Duration of the test . 13 8.6 Test procedure 13 8.6.1 Supply cir
25、cuit . 13 8.6.2 Arc initiation 13 8.6.3 Repetition of the test . 15 8.6.4 Indicators (for observing the thermal effects of gases) . 15 8.7 Assessment of the test 16 9 Test report . 16 Annex A (informative) User guide to arc fault mitigation . 19 A.1 General . 19 A.2 Arc ignition protected zones 20 A
26、.3 Items for classification 20 A.4 Use of this technical report . 21 Annex B (informative) List of notes concerning certain countries 22 Bibliography 23 Figure 1 Mounting frame for indicators . 18 Figure 2 Examples of installation positions of the indicators . 18 Table 1 Sizes of the copper ignition
27、 wire without current-limiting protection device 14 Table 2 Sizes of the copper ignition wire with current-limiting protection device . 14 Table A.1 Options for classification 20 IEC TR 61641:2014 IEC 2014 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ENCLOSED LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR
28、ASSEMBLIES GUIDE FOR TESTING UNDER CONDITIONS OF ARCING DUE TO INTERNAL FAULT FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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39、repare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC/TR 61641, which is a technical repor
40、t, has been prepared by subcommittee SC 121B: Low-voltage switchgear and controlgear assemblies, of IEC technical committee 121: Switchgear and controlgear and their assemblies for low voltage. This third edition cancels and replaces the second edition published in 2008. It constitutes a technical r
41、evision. This third edition includes the following significant technical changes with respect to the previous edition: 4 IEC TR 61641:2014 IEC 2014 arcing classes to define the different forms of protection provided against arcing faults; (i) personnel protection, (ii) damage restricted to part of t
42、he ASSEMBLY, and (iii) ASSEMBLY suitable for limited further service.; two levels of personnel protection afforded by ASSEMBLIES under arcing fault conditions; (i) for ASSEMBLIES installed in areas where access to the ASSEMBLY is restricted to skilled persons, and (ii) for ASSEMBLIES installed in ar
43、eas where the area is accessible to ordinary persons; option of individually insulating all live conductors to make the complete ASSEMBLY an arc ignition protected zone (referred to as an arc free zone in previous editions of the Technical report); arc fault protection front, back and sides of an AS
44、SEMBLY as the normal requirement; minimum performance requirements for arc ignition protected zone. The text of this technical report is based on the following documents: Enquiry draft Report on voting 121B/4/DTR 121B/14/RVC Full information on the voting for the approval of this technical report ca
45、n be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The readers attention is drawn to the fact that Annex B lists all of the “in-some-country” clauses on differing practices of a less permanent nature r
46、elating to the subject of this Technical Report. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication w
47、ill be reconfirmed, withdrawn, replaced by a revised edition, or amended. IEC TR 61641:2014 IEC 2014 5 INTRODUCTION The IEC 61439 series of standards gives rules and requirements for interface characteristics, service conditions, construction, performance and verification of low-voltage switchgear a
48、nd controlgear assemblies, hereafter called ASSEMBLIES. The main objective of these standards is to achieve the safe operation of low-voltage switchgear and controlgear assemblies under normal operating conditions as well as under abnormal operating conditions, e.g. occurrence of overvoltages, overl
49、oad or short-circuit currents. Therefore no characteristics, design and verification requirements are given dealing with the case of an arc fault inside the ASSEMBLY. Nevertheless the occurrence of an internal arc cannot completely be excluded. On the rare occasions that they do occur, typically internal arc faults result from: conducting materials inadvertently left in ASSEMBLIES during manufacture, installat
