1、 IEC 60974-12 Edition 3.0 2011-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 12: Coupling devices for welding cables Matriel de soudage larc Partie 12 : Dispositifs de connexion pour cbles de soudage IEC 60974-12:2011 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2011
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16、9 02 11 Fax: +41 22 919 03 00 IEC 60974-12 Edition 3.0 2011-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Arc welding equipment Part 12: Coupling devices for welding cables Matriel de soudage larc Partie 12 : Dispositifs de connexion pour cbles de soudage INTERNATIONAL ELECTROTECHNICAL COMMISSION C
17、OMMISSION ELECTROTECHNIQUE INTERNATIONALE M ICS 25.160.30 PRICE CODE CODE PRIX ISBN 978-2-88912-502-9 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 60974-12 IEC:2011 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative
18、references . 5 3 Terms and definitions . 5 4 Environmental conditions 6 5 Type tests 6 5.1 Test conditions 6 5.2 Test sequence . 6 6 Designation 6 7 Protection against electric shock 7 7.1 Voltage rating 7 7.2 lnsulation resistance 7 7.3 Dielectric strength . 8 7.3.1 General requirement 8 7.3.2 Addi
19、tional requirements for striking and stabilizing voltage rating 8 7.4 Protection of live parts against unintentional contact . 8 8 Thermal rating 9 8.1 Temperature rise . 9 8.2 Resistance to hot objects 9 9 Mechanical requirements 10 9.1 Retaining means . 10 9.2 Welding cable entry . 10 9.3 Penetrat
20、ion of the welding cable insulation 10 9.4 Welding cable connection 10 9.5 Crush strength. 10 9.6 Dimensions . 11 10 Marking 11 11 Instructions for use . 11 Annex A (normative) Dimensions . 12 Figure 1 Device for testing the resistance to hot objects 9 Figure A.1 Male element 12 Figure A.2 Female el
21、ement 12 Table 1 Relation between coupling device test current and welding cables cross- sectional area . 7 Table 2 Voltage rating of coupling devices . 7 Table 3 Crush force . 11 Table A.1 Dimensions for Figures A.1 and A.2 . 13 60974-12 IEC:2011 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ARC WE
22、LDING EQUIPMENT Part 12: Coupling devices for welding cables 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 international co
23、-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 (hereafter referred
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29、dependent certification bodies provide conformity assessment services and, in some areas, access to 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) N
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31、 (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this 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 applicat
32、ion 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 60974-12 has been prepared by IEC techn
33、ical committee 26: Electric welding. This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: dimensions given in Annex A become
34、 normative; designation is based on the range of cross-sectional area of the welding cable intended to be connected. 4 60974-12 IEC:2011 The text of this standard is based on the following documents: FDIS Report on voting 26/441/FDIS 26/446/RVD Full information on the voting for the approval of this
35、 standard 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 of the IEC 60974 series can be found, under the general title Arc welding equipment, on the IEC website. In this stand
36、ard, the following print types are used: - conformity statements: in italic type. 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
37、. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60974-12 IEC:2011 5 ARC WELDING EQUIPMENT Part 12: Coupling devices for welding cables 1 Scope This part of IEC 60974 is applicable to coupling devices for cables used in arc welding and allied
38、 processes, designed for connection and disconnection without using tools. This part of IEC 60974 specifies safety and performance requirements of coupling devices. This part of IEC 60974 is not applicable to coupling devices for underwater welding. 2 Normative references The following referenced do
39、cuments are indispensable for the application 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. IEC 60050-151, International Electrotechnical Vocabulary (IEV) Part 151: Ele
40、ctrical and magnetic devices IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 60974-1, Arc welding equipment Part 1: Welding power sources 3 Terms and definitions For the purposes of this document, the terms and definitions given in the IEC 60050-151, the IEC 60974-1, as well as
41、 the following apply. 3.1 coupling device device connecting two welding cables together or connecting a welding cable to welding equipment 3.2 retaining means mechanical arrangement that holds the coupling device in position and prevents an unintentional withdrawal, when properly connected 3.3 arc s
42、triking and stabilizing voltage voltage superimposed on the welding circuit to initiate or maintain the arc 6 60974-12 IEC:2011 4 Environmental conditions The coupling device shall be capable of operation when the following environmental conditions prevail: a) range of ambient air temperature: durin
43、g operation: 10 C to + 40 C; b) relative humidity of the air: up to 90 % at 20 C. The coupling device shall withstand storage and transport at an ambient air temperature of 20 C to + 55 C without any damage to function and performance. 5 Type tests 5.1 Test conditions All type tests shall be carried
44、 out on the same new and completely assembled coupling device. All type tests shall be carried out at an ambient air temperature between 10 C and 40 C. The accuracy of measuring instruments shall be: a) electrical measuring instruments: class 1 ( 1 % of full-scale reading), except for the measuremen
45、t of insulation resistance and dielectric strength where the accuracy of the instruments is not specified, but shall be taken into account for the measurement; b) temperature measuring devices: 2 K. 5.2 Test sequence The type tests given below shall be carried out in the following sequence: a) gener
46、al visual inspection; b) temperature rise, see 8.1; c) crush strength, see 9.5; d) insulation resistance, see 7.2; e) dielectric strength, see 7.3. The other type tests in this part of IEC 60974 not mentioned above may be carried out in any convenient sequence. 6 Designation Coupling devices shall b
47、e designated by the range of cross-sectional area of the welding cable intended to be connected. The test current at an ambient air temperature of 40 C is given in Table 1 based on maximum cross-section area. The welding coupling device shall accept the minimum cross-sectional area as given in Table
48、 1. Minimum cross-sectional area may be reduced to extend the coupling device fitting range. 60974-12 IEC:2011 7 Table 1 Relation between coupling device test current and welding cables cross-sectional area Range of cross-sectional area mm 2Coupling device test current at 60 % duty cycle A up to 10
49、125 10 to 16 150 16 to 25 200 25 to 35 250 35 to 50 300 50 to 70 400 70 to 95 500 NOTE Welding cables are rated based on cross-sectional area. Test current is defined in order that coupling device withstands the rated current of the welding cable. Conformity shall be checked by measurement. 7 Protection against electric shock 7.1 Voltage rating Coupling devices shall be rated in accordan
