1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 60974-13:2011Arc welding equipmentPart 13: Welding clampBS EN 60974-13:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 60974-13:2
2、011. It is idenitical to IEC 60974-13:2011. It supersedes clause 2.6 (return current clamps) of BS 638-5:1988.The UK participation in its preparation was entrusted to Technical Committee WEE/6, Electric arc welding equipment.A list of organizations represented on this committee can be obtained on re
3、quest to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 64811 3 ICS 25.160.30 Compliance with a British Standard cannot confer immunity from legal obligations.This Briti
4、sh Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2011.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 60974-13:2011EUROPEAN STANDARD EN 60974-13 NORME EUROPENNE EUROPISCHE NORM August 2011 CENELEC European Committee for
5、 Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref
6、. No. EN 60974-13:2011 E ICS 25.160.30 English version Arc welding equipment - Part 13: Welding clamp (IEC 60974-13:2011) Matriel de soudage larc - Partie 13: Pince de retour de courant (CEI 60974-13:2011) Lichtbogenschweieinrichtungen - Teil 13: Schweistromrckleitungsklemmen (IEC 60974-13:2011) Thi
7、s European Standard was approved by CENELEC on 2011-06-22. CENELEC members are bound 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 ref
8、erences concerning such national standards may be obtained on application to the Central Secretariat 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
9、 member into its own language and notified to the Central Secretariat 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, France, Germany, Greece, Hun
10、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60974-13:2011EN 60974-13:2011 - 2 - Foreword The text of document (26/442/FDIS), future edition 1 of I
11、EC 60974-13, prepared by IEC TC 26, Electric welding, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60974-13 on 2011-06-22. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall n
12、ot be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2012-03-22 latest date by which the national standards co
13、nflicting with the EN have to be withdrawn (dow) 2014-06-22 In this standard, the following print types are used: - conformity statements: in italic type. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60974-13:2011 was approved by CENELEC as a Eu
14、ropean Standard without any modification. _ BS EN 60974-13:2011- 3 - EN 60974-13:2011 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For
15、dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Ye
16、ar Title EN/HD Year IEC 60050-151 - International Electrotechnical Vocabulary (IEV) - Part 151: Electrical and magnetic devices - - IEC 60974-1 - Arc welding equipment - Part 1: Welding power sources EN 60974-1 - 2 60974-13 IEC:2011 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 Term
17、s and definitions . 5 4 Environmental conditions 5 5 Type tests 6 5.1 Test conditions 6 5.2 Measuring instruments 6 5.3 Test sequence . 6 6 Designation 6 7 Protection against electric shock 7 7.1 Voltage drop 7 7.2 Protection of live parts. 7 8 Thermal rating 7 8.1 Temperature rise . 7 8.2 Resistanc
18、e to hot objects 8 9 Mechanical requirements 8 9.1 Retaining means . 8 9.2 Welding cable entry . 9 9.3 Welding cable connection 9 9.4 Drop withstand 9 10 Marking 9 11 Instructions for use . 10 Bibliography 11 Figure 1 Device for testing the resistance to hot objects 8 Table 1 Relation between weldin
19、g clamp test current and welding cables cross-sectional area . 7 60974-13 IEC:2011 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ARC WELDING EQUIPMENT Part 13: Welding clamp FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all
20、 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 this end and in addition to other activities, IEC publishes International Standards, Tec
21、hnical 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 National Committee interested in the subject dealt with may participate in this preparatory wo
22、rk. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2
23、) 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 from all interested IEC National Committees. 3) IEC Publications have the form of recommen
24、dations 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 held responsible for the way in which they are used or for any misinterpretation by any e
25、nd 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 divergence between any IEC Publication and the corresponding national or regional public
26、ation 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 IEC marks of conformity. IEC is not responsible for any services carried out by independ
27、ent 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 individual experts and members of its technical committees and IEC National Committees for any per
28、sonal 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 IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative re
29、ferences 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 IEC Publication may be the subject of patent rights. IEC shall not be held responsible f
30、or identifying any or all such patent rights. International Standard IEC 60974-13 has been prepared by IEC technical committee 26: Electric welding The text of this standard is based on the following documents: FDIS Report on voting 26/442/FDIS 26/447/RVD Full information on the voting for the appro
31、val of this 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. 4
32、60974-13 IEC:2011 In this standard, 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 rela
33、ted to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60974-13 IEC:2011 5 ARC WELDING EQUIPMENT Part 13: Welding clamp 1 Scope This part of IEC 60974 is applicable to clamps for arc welding processes, designed to mak
34、e an electrical connection to the workpiece without using tools. This part of IEC 60974 is not applicable to clamps for underwater welding and plasma cutting. This part of IEC 60974 specifies safety and performance requirements of welding clamps. This part of IEC 60974 does not specify requirements
35、for welding cables. 2 Normative references The following referenced documents 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 60
36、050-151, International Electrotechnical Vocabulary (IEV) Part 151: Electrical and magnetic devices 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 wel
37、l as the following apply. 3.1 welding clamp work clamp, US return current clamp, UK device connecting welding cable to workpiece 3.2 rated current current assigned by the manufacturer that the welding clamp can accept at 60 % duty cycle without exceeding the permitted temperature rise 3.3 retaining
38、means mechanical arrangement that holds the welding clamp in position and prevents an unintentional withdrawal, when properly attached to the workpiece 4 Environmental conditions The welding clamp shall be capable of operation when the following environmental conditions prevail: 6 60974-13 IEC:2011
39、a) range of ambient air temperature : during operation: 10 C to +40 C; b) relative humidity of the air: up to 50 % at 40 C; up to 90 % at 20 C. The welding clamp shall withstand storage and transport at an ambient air temperature of 20 C to + 55 C without any damage to function and performance. 5 Ty
40、pe tests 5.1 Test conditions All type tests shall be carried out on the same new and completely assembled welding clamp. All type tests shall be carried out at an ambient air temperature between 10 C and 40 C. 5.2 Measuring instruments The accuracy of measuring instruments shall be: a) electrical me
41、asuring instruments: class 1 ( 1 % of full-scale reading), except for the measurement 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) thermometer: 2 K. 5.3 Test sequence The type tests gi
42、ven below shall be carried out in the following sequence: a) general visual inspection; b) temperature rise, see 8.1; c) retaining means, see 9.1; d) drop withstand, see 9.4; e) voltage drop, see 7.1; f) general visual inspection; The other type tests in this part of IEC 60974 not mentioned above ma
43、y be carried out in any convenient sequence. 6 Designation The welding clamp shall be designated by the range of cross-section area of the welding cable intended to be connected. The test current is given in Table 1 based on maximum cross-section area. The welding clamp shall accept the minimum cros
44、s-sectional area as given in Table 1. Minimum cross-sectional area may be reduced to extend the welding clamp fitting range. 60974-13 IEC:2011 7 Table 1 Relation between welding clamp test current and welding cables cross-sectional area Range of cross-sectional area mm2Welding clamp test current at
45、60 % duty cycle AWelding clamp test current at 100 % duty cycle A up to 6 80 70 6 to 10 125 87 10 to 16 150 117 16 to 25 200 157 25 to 35 250 196 35 to 50 300 248 50 to 70 400 309 70 to 95 500 374 NOTE 100 % duty cycle test current values are based on cable current capacity given in Table 10 of HD 5
46、16 S2. Conformity shall be checked by measurement. 7 Protection against electric shock 7.1 Voltage drop The clamps in the new condition shall be capable of satisfactorily passing the voltage test. Conformity shall be checked by the following test: Two clamps are required for this test. Connect each
47、clamp to a cable of maximum cross-sectional area as indicated in Table 1, by using the method of attachment for which the clamps are designed. Attach one clamp to each end of a clean mild steel plate 300 mm 75 mm 12 mm. Connect the other end of the cables to a power source to form a circuit. Pass th
48、e test current through both clamps and the plate. The voltage is measured on the two cables, 10 mm away from the clamps. The voltage drop shall not exceed 0,08 V per 100 A of the test current. 7.2 Protection of live parts The welding clamp can be either protected against unintentional contact with t
49、he workpiece or not protected. Conformity shall be checked by visual inspection. 8 Thermal rating 8.1 Temperature rise The temperature rise caused by the current passing through a welding clamp normally coupled and fitted with an untinned copper welding cable of maximum cross-sectional area as indicated in Table 1 shall not exceed: a) at the hottest spot of the external surface normally gripped by the operator: 30 K; b) at the connection of the welding cable to the we
