1、 IEC 60947-7-4 Edition 1.0 2013-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switchgear and controlgear Part 7-4: Ancillary equipment PCB terminal blocks for copper conductors Appareillage basse tension Partie 7-4: Matriels accessoires Blocs de jonction pour cartes de circuits imprims
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16、 IEC 60947-7-4 Edition 1.0 2013-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switchgear and controlgear Part 7-4: Ancillary equipment PCB terminal blocks for copper conductors Appareillage basse tension Partie 7-4: Matriels accessoires Blocs de jonction pour cartes de circuits imprims
17、pour conducteurs en cuivre INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE U ICS 29.130.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1029-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internation
18、ale 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 agr. colourinside 2 60947-7-4 IEC:2013 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 General 7 1.1 Scope 7 1.2 Normative re
19、ferences 7 2 Terms and definitions . 9 3 Classification 10 4 Characteristics . 10 4.1 Summary of characteristics . 10 4.2 Type of PCB terminal block . 10 4.3 Rated and limiting values 10 4.3.1 Rated voltages 10 4.3.2 Rated current 10 4.3.3 Standard cross-sections 10 4.3.4 Maximum cross-section . 11
20、4.3.5 Connecting capacity 11 5 Product information 12 5.1 Marking . 12 5.2 Additional information 13 6 Normal service, mounting and transport conditions . 13 7 Constructional and performance requirements 13 7.1 Constructional requirements 13 7.1.1 Clamping units . 13 7.1.2 Mounting and installation
21、. 14 7.1.3 Clearances and creepage distances 14 7.1.4 Terminal identification and marking . 14 7.1.5 Resistance to abnormal heat and fire . 15 7.1.6 Maximum cross-section and connecting capacity . 15 7.2 Performance requirements 15 7.2.1 Temperature rise . 15 7.2.2 Dielectric properties . 15 7.2.3 S
22、hort-time withstand current 15 7.2.4 Contact resistance . 16 7.2.5 Ageing test (climatic sequence and corrosion test) 16 7.3 Electromagnetic compatibility (EMC) . 16 8 Tests 16 8.1 Kinds of test 16 8.2 General . 16 8.3 Verification of mechanical characteristics 17 8.3.1 General . 17 8.3.2 Attachment
23、 of the PCB terminal block on its support 17 8.3.3 Vacant . 17 8.3.4 Verification of the maximum cross-section and connecting capacity . 17 8.3.5 Verification of maximum cross-section (special test with gauges) 17 8.4 Verification of electrical characteristics 17 8.4.1 General . 17 60947-7-4 IEC:201
24、3 3 8.4.2 Verification of clearances and creepage distances. 18 8.4.3 Dielectric tests . 18 8.4.4 Verification of contact resistance . 19 8.4.5 Temperature rise test 20 8.4.6 Short-time withstand current test . 22 8.4.7 Ageing test (climatic sequence and corrosion test) 23 8.5 Verification of therma
25、l characteristics 24 8.6 Verification of EMC characteristics 25 8.6.1 General . 25 8.6.2 Immunity 25 8.6.3 Emission 25 Annex A (informative) Structure of a PCB terminal block 26 Annex B (informative) Additional Information to be specified between manufacturer and user . 27 Annex C (informative) Exam
26、ples of PCBs and PCB terminal blocks for high current application 28 Bibliography 30 Figure 1 Test assembly for the measurement of contact resistance and temperature rise . 20 Figure 2 Example of wiring structure of a multi-tier PCB terminal block 21 Figure 3 Test assembly for the measurement of sho
27、rt-time withstand current . 23 Figure 4 Test sequence . 24 Figure A.1 Structure of a PCB terminal block . 26 Figure C.1 Structure of a high current PCB 28 Figure C.2 PCB terminal block with soldered connection to the PCB 28 Figure C.3 PCB terminal block with screwed connection to the PCB 29 Table 1
28、Standard cross-sections of copper conductors 11 Table 2 Relationship between maximum cross-section and connecting capacity of PCB terminal blocks 12 Table 3 Standards for clamping units and connecting methods 14 Table 4 Impulse withstand test voltages . 19 Table 5 Dielectric test voltages correspond
29、ing to the rated insulation voltage 19 Table 6 Length of connectable conductors and conductor loops . 21 Table 7 Examples of cross-sectional distribution of interconnections on printed circuit boards 22 4 60947-7-4 IEC:2013 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LOW-VOLTAGE SWITCHGEAR AND CONTR
30、OLGEAR Part 7-4: Ancillary equipment PCB terminal blocks for copper conductors 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 promot
31、e international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (h
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40、 correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this 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 60947-7-4 has been pre
41、pared by subcommittee 17B: Low-voltage switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear. The text of this standard is based on the following documents: FDIS Report on voting 17B/1822/FDIS 17B/1827/RVD Full information on the voting for the approval of this standa
42、rd can 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. A list of all parts in the IEC 60947 series, published under the general title Low-voltage switchgear and controlgear, can be found on the IEC we
43、bsite. 60947-7-4 IEC:2013 5 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 will be reconfirmed, w
44、ithdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour pr
45、inter. 6 60947-7-4 IEC:2013 INTRODUCTION This standard IEC 60947-7-4 for PCB terminal blocks covers not only the terminal block requirements according to IEC 60947-7 series but also takes into account the specifications of connectors according to IEC 61984 as the requirements for both components are
46、 highly similar due to equivalent applications. 60947-7-4 IEC:2013 7 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-4: Ancillary equipment PCB terminal blocks for copper conductors 1 General 1.1 Scope This part of IEC 60947 specifies requirements for PCB terminal blocks primarily intended for industr
47、ial or similar use. Mounting and fixing on the printed circuit board is made by soldering, press-in or equivalent methods to provide electrical and mechanical connection between copper conductors and the printed circuit board. This standard applies to PCB terminal blocks intended to connect copper c
48、onductors, with or without special preparation, having a cross-section between 0,05 mm2and 300 mm2(AWG 30/600 kcmil), intended to be used in circuits of a rated voltage not exceeding 1 000 V a.c. up to 1 000 Hz or 1 500 V d.c. NOTE 1 Large cross section terminal blocks are dedicated to specific desi
49、gn of high current PCBs. The range up to 300 mm is kept to cover any possible application. Examples of high current PCBs and PCB terminal blocks are shown in Annex C. NOTE 2 AWG is the abbreviation of “American Wire Gage” (Gage (US) = Gauge (UK); kcmil = 1 000 cmil; 1 cmil = 1 circular mil = surface of a circle having a diameter of 1 mil; 1 mil = 1/1 000 inch. This standard may be used as a guide fo
