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1、BRITISH STANDARD BS EN 60974-1:2005 Arc welding equipment Part 1: Welding power sources The European Standard EN 60974-1:2005 has the status of a British Standard ICS 25.160 ? BS EN 60974-1:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on
2、 6 January 2006 BSI 6 January 2006 ISBN 0 580 47109 8 National foreword This British Standard is the official English language version of EN 60974-1:2005. It is identical with IEC 60974-1:2005. It supersedes BS EN 60974-1:1998 which is withdrawn. The UK participation in its preparation was entrusted
3、 to Technical Committee WEE/6, Electric arc welding equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to
4、 in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions o
5、f a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or pro
6、posals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 105 and a back cover. The BSI copyright notice displa
7、yed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD EN 60974-1 NORME EUROPENNE EUROPISCHE NORM October 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electro
8、technique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60974-1:2005 E ICS 25.160 Supersedes EN 60974-1:1998 + A1:2
9、000 + A2:2003 English version Arc welding equipment Part 1: Welding power sources (IEC 60974-1:2005) Matriel de soudage larc Partie 1: Sources de courant de soudage (CEI 60974-1:2005) Lichtbogenschweieinrichtungen Teil 1: Schweistromquellen (IEC 60974-1:2005) This European Standard was approved by C
10、ENELEC on 2005-10-01. 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 references concerning such national stan
11、dards 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 member into its own language and not
12、ified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg
13、, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 26/307/FDIS, future edition 3 of IEC 60974-1, prepared by IEC TC 26, Electric welding, was submitted to the IEC-CENELEC parallel vote and was approved by C
14、ENELEC as EN 60974-1 on 2005-10-01. This European Standard supersedes EN 60974-1:1998 + A1:2000 + A2:2003. The significant changes with respect to EN 60974-1:1998 are the following: the scope includes relationship to other parts of EN 60974; environmental conditions were changed (see 4.a and 4.e); c
15、onformity of components is given (see 5.3); the sequence of type test was changed (see 5.4); more precise requirements for measuring the no-load voltage during routine test are given (see 5.5d); creepage values for printed circuit boards are implemented (see Table 2); requirements for enclosures are
16、 changed (see 6.2.1); requirements for primary leakage current are included (see 6.3.7 and Annex N); requirements for engine driven power sources are changed (see 7.1.2 and 7.3.2); requirements for supply circuit terminals are changed (see 10.4.3 and 10.4.4); requirements for cable anchorage are cha
17、nged (see 10.5); requirements for coupling devices are changed (see 10.9); standard characteristic for plasma welding is included (11.2.6); requirements for welding cables are added (see 11.7); requirements for plastic material used as enclosure materials are added (see 14.2.1); requirements for man
18、ual handling are added (see 14.3.2); existing ISO symbols and labels are taken into account (see 15.3 and 17.2). 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) 2006-07-01 lat
19、est date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-10-01 Annex ZA has been added by CENELEC. _ EN 60974-1:2005 2 Endorsement notice The text of the International Standard IEC 60974-1:2005 was approved by CENELEC as a European Standard without any modific
20、ation. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60085 NOTE Harmonized as EN 60085:2004 (not modified). IEC 60204-1 NOTE Harmonized as EN 60204-1:1997 (not modified). IEC 62079 NOTE Harmonized as EN 62079:2001 (not modified). IEC
21、 62081 NOTE Harmonized as CLC/TS 62081:2002 (not modified). _ EN 60974-1:2005 3 EN 60974-1:2005 4 CONTENTS 7 1 Scope .7 2 Normative references .8 3 Terms and definitions 15 4 Environmental conditions 16 5 Tests 18 6 Protection against electric shock .28 7 Thermal requirements 32 8 Abnormal operation
22、 .34 9 Thermal protection .36 10 Connection to the input supply network 42 11 Output .48 12 Control circuits 48 13 Hazard reducing device 50 14 Mechanical provisions 52 15 Rating plate .57 16 Adjustment of the output .58 17 Instructions and markings .61 Annex A (informative) Nominal voltages of supp
23、ly networks 62 Annex B (informative) Example of a combined dielectric test Annex C (normative) Unbalanced load in case of a.c. tungsten inert-gas welding power sources63 .65 Annex D (informative) Extrapolation of temperature to time of shutdown 66 Annex E (normative) Construction of supply circuit t
24、erminals .68 Annex F (informative) Cross-reference to non-SI units Annex G (informative) Suitability of supply network for the measurement of the true r.m.s. value of the supply current 69 .70 Annex H (informative) Plotting of static characteristics .71 Annex I (normative) Test methods for a 10 Nm i
25、mpact .72 Annex J (normative) Thickness of sheet metal for enclosures .74 Annex K (informative) Examples of rating plates .78 Annex L (informative) Graphical symbols for arc welding equipment Figure 1 Measurement of leakage current of welding circuit25 Figure 2 Measuring network for primary leakage
26、current.27 Figure 3 Measurement of peak values 44 Figure 4 Principle of the rating plate.53 Annex ZA (normative) Normative references to international publications with their Annex M (informative) Efficiency 100 Annex N (normative) Primary leakage current measurement . 101 Bibliography 104 104 corre
27、sponding European publications Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:22:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 EN 60974-1:2005 Figure B.1 Combined high-voltage transformers .62 Figure C.1 Voltage and current during a.c. tungsten inert-gas welding 63 Figure C.2 Unbalanced
28、 voltage during a.c. tungsten inert-gas welding64 Figure C.3 AC welding power source with unbalanced load 64 Figure I.1 Test set-up 71 Figure K.1 Single-phase transformer 74 Figure K.2 Three-phase rotating frequency converter .75 Figure K.3 Subdivided rating plate: single-/three-phase transformer re
29、ctifier .76 Figure K.4 Engine-generator-rectifier .77 Figure L.1 Input voltage power switch .98 Figure L.2 Arc force control potentiometer.98 Figure L.3 Remote receptacle and selector switches .98 Figure L.4 Terminals with inductance selector for MIG/MAG welding .98 Figure L.5 Process switch (MMA, T
30、IG, MIG) 99 Figure L.6 Selector switch on AC/DC equipment . 99 Figure L.7 Panel indicator lights (overheat, fault, arc striking, output voltage ) 99 Figure L.8 Setting pulsing parameters using digital display 99 Figure N.1 Diagram for leakage current meaurement at operating temperature for single- p
31、hase connection of appliances other than those of class II 101 Figure N.2 Diagram for leakage current meaurement at operating temperature for three- phase connection of appliances other than those of class II . 101 Figure N.3 Diagram for leakage current measurement at operating temperature for singl
32、e- phase connection of class II appliances . 102 Figure N.4 Diagram for leakage current measurement at operating temperature for three- phase connection of class II appliances .102 Table 1 Minimum clearances for overvoltage category III.18 Table 2 Minimum creepage distances .20 Table 3 Insulation re
33、sistance 21 Table 4 Dielectric test voltages .21 Table 5 Minimum distance through insulation 25 Table 6 Limits of temperature rise for windings, commutators and slip-rings 30 Table 6 (continued)31 Table 7 Limits of temperature rise for external surfaces.31 Table 8 Cross-section of the output short-c
34、ircuit conductor33 Table 9 Current and time requirements for protective circuits 38 Table 10 Minimum cross-sectional area of the external protective copper conductor 38 Table 11 Verification of continuity of the protective bonding circuit 39 Table 12 Pull 40 Table 13 Summary of allowable rated no-lo
35、ad voltages .44 Table 14 Hazard reducing device requirements .49 Table E.1 Range of conductor dimensions to be accepted by the supply circuit terminals .66 Table E.2 Spacing between supply circuit terminals 67 EN 60974-1:2005 6 Table F.1 Cross-reference for mm2 to American wire gauge (AWG) .68 Table
36、 F.2 Cross reference for kW to horsepower (hp).68 Table I.1 Mass of the free fall weight and height of the free fall.71 Table J.1 Minimum thickness of sheet metal for steel enclosures .72 Table J.2 Minimum thickness of sheet metal for enclosures of aluminium, brass or copper73 Table L.1 Letters used
37、 as symbols.79 7 EN 60974-1:2005 ARC WELDING EQUIPMENT Part 1: Welding power sources 1 Scope This part of IEC 60974 is applicable to power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding that specified in Table 1 of I
38、EC 60038, or driven by mechanical means. This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems. This part of IEC 60974 is not applicable to welding power sources for manual metal arc welding with limited duty operation which are desi
39、gned mainly for use by laymen. This part of IEC 60974 is not applicable to testing of power sources during periodic maintenance or after repair. NOTE 1 Typical allied processes are electric arc cutting and arc spraying. NOTE 2 This part of IEC 60974 does not include electromagnetic compatibility (EM
40、C) requirements. 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 60038
41、, IEC standard voltages IEC 60050(151), International Electrotechnical Vocabulary (IEV) Part 151: Electrical and magnetic devices IEC 60050(851), International Electrotechnical Vocabulary (IEV) Chapter 851: Electric welding IEC 60112, Method for the determination of the proof and the comparative tra
42、cking indices of solid insulating materials IEC 60245-6, Rubber insulated cables Rated voltages up to and including 450/750 V Part 6: Arc welding electrode cables IEC 60309-1, Plugs, socket-outlets and couplers for industrial purposes Part 1: General requirements IEC 60417-DB:2002 , Graphical symbol
43、s for use on equipment 1 _ 1 “DB” refers to the IEC on-line database. EN 60974-1:2005 8 _ IEC 60445, Basic and safety principles for man-machine interface, marking and identification Identification of equipment terminals and of terminations of certain designated conductors, including general rules f
44、or an alphanumeric system IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests2 Amendment 1 (2000) Amendment 2 (2002) IEC 60664-3, Insulation coordination for eq
45、uipment within low-voltage systems Part 3: Use of coating, potting or moulding for protection against pollution IEC 60695-11-10, Fire hazard testing Part 11-10: Test flames 50 W horizontal and vertical flame test methods IEC 60974-7, Arc welding equipment Part 7: Torches IEC 60974-12, Arc welding eq
46、uipment Part 12: Coupling devices for welding cables IEC 61140, Protection against electric shock Common aspects for installation and equipment IEC 61558-2-4, Safety of power transformers, power supply units and similar Part 2-4: Particular requirements for isolating transformers for general use IEC
47、 61558-2-6, Safety of power transformers, power supply units and similar Part 2-6: Particular requirements for safety isolating transformers for general use CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment Electro- magnetic disturbance characteristics Limits and methods o
48、f measurement 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050(151), IEC 60050(851) and IEC 60664-1, as well as the following, apply. 3.1 arc welding power source equipment for supplying current and voltage and having the required characteristics suitable for arc welding and allied processes NOTE 1 An arc welding power source may also supply services to other equipment and auxiliaries for example auxiliary power, cooling liquid, consumable arc welding electrode and gas to shield the arc and the welding are