1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 60974-1 Arc Welding Equipment; Part 1: Welding Power SourcesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL
2、NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Arc Welding Equipment; Part 1: Welding Power Sources, UL 60974-1 First Edition, Dated March 17, 2005 Summary of Topics Revision pages have been issued to delete the ANSI approval information
3、 from the title page. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, elec
4、tronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be
5、 liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibilit
6、y of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liabil
7、ity, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. SEPTEMBER 28, 2015 UL 60974-1 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
8、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 28, 2015 UL 60974-1 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 17, 2005 (Title Page Reprinted: September 28, 2015) 1 UL 60974-1 Standard for Arc Welding
9、 Equipment; Part 1: Welding Power Sources First Edition March 17, 2005 Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/.
10、ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS
11、LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 17, 2005 UL 60974-1 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface (UL)
12、 6 NATIONAL DIFFERENCES .7 FOREWORD 8 1 Scope 10 2 Normative references .10 3 Denitions 12 4 Environmental conditions .18 5 Test conditions 18 5.1 TYPE TESTS .19 5.2 ROUTINE TESTS 20 6 Protection against electric shock .21 6.1 Insulation .21 6.2 Protection against electric shock in normal service (d
13、irect contact) 26 6.3 Protection against electric shock in case of a fault condition (indirect contact) 28 7 Thermal requirements 32 7.1 Heating test 32 7.2 Temperature measurement .33 7.3 Limits of TEMPERATURE RISE .35 7.4 Loading test 37 7.5 Commutators and slip-rings .38 8 Abnormal operation 38 8
14、.1 Stalled fan 38 8.2 Short circuit .39 8.3 Overload .39 9 THERMAL PROTECTION 40 9.1 Construction 40 9.2 Location 40 9.3 Operation 40 9.4 Resetting .41 9.5 Operating capacity 41 9.6 Indication .41 10 Connection to the input supply .41 10.1 Supply voltage .41 10.2 Power supply 42 10.3 Means of connec
15、tion .43 10.4 Input supply terminals .43 10.5 Cable anchorage .45 10.6 Inlet openings 47 10.7 Input supply on/off switching device 47 10.8 Supply cables 48 10.9 Supply coupling device (attachment plug) .48 11 Output .49 11.1 RATED NO-LOAD VOLTAGE (U 0 ) .49 11.2 TYPE TEST values of the CONVENTIONAL
16、LOAD VOLTAGE 52 11.3 Mechanical switching devices used to adjust output 53 11.4 Output connections .54 11.5 Power supply to external devices .55 MARCH 17, 2005 UL 60974-1 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 11.6 Auxiliary power
17、output 56 12 CONTROL CIRCUITS .56 13 HAZARD REDUCING DEVICE 56 13.1 VOLTAGE REDUCING DEVICE 56 13.2 Switching device for a.c. to d.c. 57 13.3 Connection of a HAZARD REDUCING DEVICE 57 13.4 Interference with operation of a HAZARD REDUCING DEVICE 57 13.5 Indication of satisfactory operation 57 13.6 Fa
18、il to a safe condition 57 14 Mechanical requirements 57 14.1 Enclosure .58 14.2 Impact resistance of handles, push buttons etc. 58 14.3 Handling means 59 14.4 Drop withstand .59 14.5 Tilting stability 60 15 Rating plate 60 15.1 Description 60 15.2 Contents 61 15.3 Tolerances 67 15.4 Direction of rot
19、ation .67 16 Adjustment of the output .67 16.1 Type of adjustment .67 16.2 Marking of the adjusting device 68 16.3 Indication of current or voltage control 69 17 Instructions and markings 69 17.1 Instructions 69 17.2 Markings 70 17.3 Addition for PLASMA CUTTING POWER SOURCES 71 Annex A (informative)
20、 Nominal voltages of supply systems (see 6.1.1 and 6.1.2) Annex B (informative) Example of a combined dielectric test (see 6.1.4) Annex C (normative) Unbalanced load in case of a.c. tungsten inert-gas welding power sources (see 7.1) C.1 Introduction .75 C.2 Unbalanced load .77 C.3 Example for an unb
21、alanced load .77 Annex D (informative) Extrapolation of temperature to time of shutdown (see 7.2.5) Annex E (normative) Construction of input supply terminals (see 10.4) E.1 Size of terminals .80 E.2 Spacings between terminals .80 E.3 Connections at the terminals 81 E.4 Construction of the terminals
22、 81 MARCH 17, 2005 UL 60974-1 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL E.5 Fixing of the terminals 81 Annex F (informative) Cross-reference to non-SI units Annex G (informative) Suitability of input supply for the measurement of the
23、true r.m.s. value of the supply current (see 10.8) Annex H (informative) Plotting of STATIC CHARACTERISTICS (see 11.2) H.1 Introduction .85 H.2 Method .85 H.3 Analysis of the results 85 Annex I (normative) Methods of a 10 Nm impact test (see 14.1) I.1 Pendulum impact hammer .87 I.2 Free fall weight
24、.89 Annex J (normative) Thickness of sheet metal for enclosures (see 14.1) Annex K (informative) Examples of rating plates (see 15.1) MARCH 17, 2005 UL 60974-1 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface (UL) This UL Standard is
25、 based on IEC Publication 60974-1: Second edition Arc Welding Equipment; Part 1: Welding Power Sources, as revised by Amendment 1. IEC publication 60974-1 is copyrighted by the IEC. The text, gures and tables of IEC Publication Arc Welding Equipment; Part 1: Welding Power Sources, IEC 60974-1 copyri
26、ght 1998 as amended in 2000 are used in this Standard with the consent of the IEC and the American National Standards Institute (ANSI). The IEC copyrighted material has been reproduced with permission from ANSI. ANSI should be contacted regarding the reproduction of any portion of the IEC material.
27、The IEC Foreword and Introduction are not a part of the requirements of this Standard but are included for information purposes only. Copies of IEC Publication 60974-1 may be purchased from ANSI, 11 West 42 nd Street, New York, New York, 10036, (212) 642-4900. Note Although the intended primary appl
28、ication of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose. MARCH 17, 2005 UL 60974-1 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W
29、ITHOUT PERMISSION FROM UL NATIONAL DIFFERENCES GENERAL National Differences from the text of International Electrotechnical Commission (IEC) Publication 60974-1, Arc Welding Equipment; Part 1: Welding Power Sources copyright 1998 as amended in 2000, are indicated by notations (differences) and are p
30、resented in bold text. There are ve types of National Differences as noted below. The difference type is noted on the rst line of the National Difference in the standard. The standard may not include all types of these National Differences. DR These are National Differences based on the national reg
31、ulatory requirements. D1 These are National Differences which are based on basic safety principles and requirements, elimination of which would compromise safety for consumers and users of products. D2 These are national differences from IEC requirements based on existing safety practices. These req
32、uirements reect national safety practices, where empirical substantiation (for the IEC or national requirement) is not available or the text has not been included in the IEC standard. DC These are National Differences based on the component standards and will not be deleted until a particular compon
33、ent standard is harmonized with the IEC component standard. DE These are National Differences based on editorial comments or corrections. Each national difference contains a description of what the national difference entails. Typically one of the following words is used to explain how the text of t
34、he national difference is to be applied to the base IEC text: Addition / Add - An addition entails adding a complete new numbered clause, subclause, table, gure, or annex. Addition is not meant to include adding select words to the base IEC text. Modication / Modify - A modication is an altering of
35、the existing base IEC text such as the addition, replacement or deletion of certain words or the replacement of an entire clause, subclause, table, gure, or annex of the base IEC text. Deletion / Delete - A deletion entails complete deletion of an entire numbered clause, subclause, table, gure, or a
36、nnex without any replacement text. MARCH 17, 2005 UL 60974-1 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTERNATIONAL ELECTROTECHNICAL COMMISSION ARC WELDING EQUIPMENT Part 1: Welding power sources FOREWORD 1) The IEC (International El
37、ectrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic elds.
38、To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-government
39、al organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IE
40、C 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 National Committees. 3) The documents produced have the form of recommendations for international use and are pu
41、blished in the form of standards, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unication, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their n
42、ational and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be
43、in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60974-1 has
44、been prepared by IEC technical committee 26: Electric welding, and by ISO technical committee 44: Welding and allied processes. This second edition cancels and replaces the rst edition published in 1989 and constitutes a technical revision. The text of this standard is based on the following documen
45、ts: FDIS Report on voting 26/153/FDIS 26/156/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This amendment has been prepared by IEC technical committee 26: Electric welding. The text of this amendment is based o
46、n the following documents: MARCH 17, 2005 UL 60974-1 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FDIS Report on voting 26/181/FDIS 26/197/RVD Full information on the voting for the approval of this amendment can be found in the report o
47、n voting indicated in the above table. The committee has decided that the contents of the base publication and its amendments will remain unchanged until 2004. At this date, the publication will be: reconrmed; withdrawn; replaced by a revised edition, or amended. Annexes C, E, I and J form an integr
48、al part of this standard. Annexes A, B, D, F, G, H and K are for information only. DV.1 DE Addition: Words in SMALL ROMAN CAPITALS in the text are dened in clause 3. DV.2 DE Addition: The numbering system in the standard uses a space instead of a comma to indicate thousands and uses a comma instead
49、of a period to indicate a decimal point. For example, 1 000 means 1,000 and 1,01 means 1.01. MARCH 17, 2005 UL 60974-1 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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 specied in table 1 of IEC 6003
