SANS 61204-7-2008 Low-voltage power supplies d c output Part 7 Safety requirements《低压直流电源 第7部分 安全要求》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21808-9 SANS 61204-7:2008Edition 1IEC 61204-7:2006Edition 1SOUTH AFRICAN NATIONAL STANDARD Low-voltage power supplies, d.c. output Part 7:

4、 Safety requirements This national standard is the identical implementation of IEC 61204-7:2006 and is adopted with the permission of the International Electrotechnical Commission. WARNING Can only be used in conjunction with SANS 60950-1. Published by SABS Standards Division 1 Dr Lategan Road Groen

5、kloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 61204-7:2008 Edition 1 IEC 61204-7:2006 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS TC 69, Power electroni

6、cs and alternative energy conversion, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in November 2008. NORME INTERNATIONALECEIIECINTERNATIONAL STANDARD 61204-7Premire ditionFirst edition2006-07Alimen

7、tations basse tension, sortie continue Partie 7: Exigences de scurit Low-voltage power supplies, d.c. output Part 7: Safety requirements Numro de rfrence Reference number CEI/IEC 61204-7:2006 SANS 61204-7:2008This s tandard may only be used and printed by approved subscription and freemailing client

8、s of the SABS .61204-7 IEC:2006 3 CONTENTS FOREWORD.9 0 Principles of Safety 13 1 General 13 1.1 Scope13 1.2 Definitions .15 1.3 General requirements19 1.4 General conditions for tests.19 1.5 Components21 1.6 Power interface .23 1.7 Marking and instructions23 2 Protection from hazards .25 2.1 Protec

9、tion from electric shock and energy hazards25 2.2 SELV circuits.27 2.3 TNV circuits.27 2.4 Limited current circuits 27 2.5 Limited power sources.27 2.6 Provisions for earthing and bonding 27 2.7 Overcurrent and earth fault protection in primary circuits.29 2.8 Safety interlocks29 2.9 Electrical insu

10、lation .29 2.10 Clearances, creepage distances and distances through insulation.29 3 Wiring, connections and supply 29 4 Physical requirements 29 5 Electrical requirements and simulated abnormal conditions 29 5.1 Touch current and protective conductor current.29 5.2 Electric strength 29 5.3 Abnormal

11、 operating and fault conditions29 6 Connection to telecommunication networks 31 7 Connection to a cable distribution system.31 Annex PS-A (normative) Requirements for power supply units for use in electrical equipment for measurement, control and laboratory use .35 Annex PS-B (normative) Requirement

12、s for power supply units for use in medical electrical equipment135 Annex PS-C (informative) Reserved for future use.137 Annex PS-D (normative) Requirements for power supply units used in or with audio, video and similar electronic apparatus 139 Appendix PS-D.A (normative) Additional requirements fo

13、r STAND-ALONE POWER Annex PS-E (normative) DC power and distribution equipment 287 Annex PS-F (informative) Guidance on marking and installation instructions for proper selection of POWER SUPPLIES for use in INFORMATION TECHNOLOGY EQUIPMENT 325 Annex PS-P (normative) Normative references 329 Annex P

14、S-Q (informative) Bibliography331 SANS 61204-7:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61204-7 IEC:2006 5 Figure PS-A1 Maximum duration of short-term temporary accessible voltages in single fault condition (see PS-A.6.3.2 a) 89 Fi

15、gure PS-A6 Baffle .121 Figure PS-A.A4 Current measuring circuit for wet contact 129 Figure PS-D4 Test hook.259 Figure PS-D6 Dielectric strength test instrument259 Figure PS-D7 Test voltages .261 Figure PS-D10 Minimum clearances and creepage distances on printed boards 263 Figure PS-D13 Distances fro

16、m a potential ignition source and an example for the design of barriers263 Figure PS-E.1.100A Resistance and short circuit calculations295 Table 1A.101 Marking and installation instruction information 25 Table 1A.100 Separation of ringing circuits from other circuits .27 .Table PS-A 100 Comparison o

17、f IEC 61010-1:2001 and IEC 61204-7.35 Table PS-A1 Symbols 75 Table PS-A2 Tightening torque for screw assemblies.93 Table PS-A5 CLEARANCES for circuits derived from mains circuits .99 Table PS-A6 CLEARANCE values for the calculation of PS-A.6.7.3.2 101 Table PS-A7 CREEPAGE DISTANCES .103 Table PS-A9

18、Test voltages for basic insulation 109 Table PS-A11 Physical tests on power supply cords 111 Table PS-A12 Acceptable perforation of the bottom of an ENCLOSURE 121 Table PS-A15 Surface temperature limits in NORMAL CONDITION123 Table PS-A16 Insulation material of windings 125 Table PS-A.E.1 Reduction

19、of pollution degree of internal environment through the use of additional protection.131 Table PS-D100 Comparison of IEC 60065:2001) with IEC 61204-7 (IEC 60950:1999 and IEC 60950-1:2001).139 Table PS-D3 Permissible temperature rise of parts of the POWER SUPPLY .193 Table PS-D5 Test voltages for die

20、lectric strength test and values for insulation resistance.207 Table PS-D12 Minimum CLEARANCES and CREEPAGE DISTANCES (enclosed, enveloped or hermetically sealed constructions) 217 Table PS-D13 Flammability category related to distance from potential ignition sources.219 Table PS-D14 Peak surge curr

21、ent233 Table PS-D15 Nominal cross-sectional area to be accepted by terminals.243 Table PS-D17 Pull force on pins 243 Table PS-D18 Nominal cross-sectional areas of external flexible cords245 Table PS-D20 Torque to be applied to screws .249 Table PS-D21 Distances from potential ignition sources and co

22、nsequential flammability categories .255 Table PS-D.B.1 Separation of TNV CIRCUITS 269 SANS 61204-7:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61204-7 IEC:2006 7 Table PS-D.N.1 Test voltage283 Table PS-E.2.100 AC and DC field wiring

23、spacings305 Table PS-E.2.101 Minimum acceptable spacings for uninsulated bus bars 307 Table PS-E.4B.101 Temperature limits 309 Table PS-E.5.101 Switch test sequences.313 SANS 61204-7:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61204-7

24、 IEC:2006 9 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LOW-VOLTAGE POWER SUPPLIES, DC OUTPUT Part 7: Safety requirements FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National

25、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, Technical Specifications, Technical Reports, Publicly A

26、vailable 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 work. International, governmental and non-governmental

27、 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) The formal decisions or agreements of IEC on techn

28、ical 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 recommendations for international use and are accepted by IE

29、C 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 end user. 4) In order to promote international unifor

30、mity, 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 publication shall be clearly indicated in the latter. 5) I

31、EC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors,

32、 employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out

33、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 application of this publication. 9) Attention is drawn to

34、 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 61204-7 has been prepared by subcommittee 22E: Stabilized power supplies, of IEC technic

35、al committee 22: Power electronic systems and equipment. IEC 61204-7 has the status of a product standard. The text of this standard is based on the following documents: FDIS Report on voting 22E/101/FDIS 22E/102/RVDFull information on the voting for the approval of this standard can be found in the

36、 report on voting indicated in the above table. The French version of this standard has not been voted upon. SANS 61204-7:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61204-7 IEC:2006 11 This standard does not follow the rules for stru

37、cturing International Standards as given in Part 2 of the ISO/IEC Directives because of the varied requirements which can apply to power supplies. It assumes that all power supplies are required to meet either IEC 60950:1999 and/or IEC 60950-1:2001. In addition power supplies may also have to meet t

38、he requirements of other standards dependent on the application. To satisfy this need it was decided that all power supplies shall meet IEC 60950:1999 and/or IEC 60950-1:2001 as described in the main body of this standard. The differences between these requirements and those of other standards can t

39、hen be optionally applied by applying any or all of the appropriate annexes. This was done to avoid confusion. The annexes of this international standard are clearly described in 1.1.1. IEC 61204 consists of the following parts, under the general title Low voltage power supplies, DC output: Part 1:

40、Reserved for future use. Part 2: Performance characteristics1Part 3: Electromagnetic compatibility (EMC) Part 4: Tests other than EMC1Part 5: Reserved for future use. Part 6: Requirements for low-voltage power supplies of assessed performance Part 7: Safety Requirements This standard makes reference

41、 to the standard IEC 60950:1999 and/or IEC 60950-1:2001 in the form of “clause number/RD”. In this context, “RD” means “Reference Document” i.e. IEC 60950:1999 and/or IEC 60950-1:2001. Unless otherwise specified, RD means that both documents apply. However, it is only necessary to apply one or other

42、 of these standards. Wherever the word equipment occurs in this reference document, this means POWER SUPPLY. The annexes of IEC 60950:1999 and/or IEC 60950-1:2001 are also referred to by means of “RD“ where these are specific references, otherwise these annexes apply as detailed in the clauses of th

43、ese standards referred to in this standard. This publication should be read in conjunction with IEC 60950:1999 and/or IEC 60950-1:2001. In this standard, the following print types are used: Requirements proper and normative annexes: in roman type. Compliance statements and test specifications: in it

44、alic type. Notes and other informative matter: in smaller roman type. Normative conditions within tables: in smaller roman type. Terms that are defined in 1.2: SMALL CAPITALS. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indi

45、cated 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; withdrawn; replaced by a revised edition, or amended. 1Under consideration. SANS 61204-7:2008This s tandard may only be used and printed by appr

46、oved subscription and freemailing clients of the SABS .61204-7 IEC:2006 13 LOW-VOLTAGE POWER SUPPLIES, DC OUTPUT Part 7: Safety requirements 0 Principles of Safety The principles of 0/RD apply. 1 General 1.1 Scope 1.1.1 Equipment covered by this standard This part of IEC 61204 specifies the safety r

47、equirements for POWER SUPPLY units providing DC output(s) with or without auxiliary a.c. output(s) operating from a.c. or d.c. source voltages up to 600 V a.c. or 1 000 V d.c. (See exceptions in 1.1.3). NOTE Ringing generators used in telecoms applications are covered by this standard. This product

48、standard covers both STAND-ALONE and COMPONENT POWER SUPPLY units as defined in this document. POWER SUPPLY units, which comply with the main body of this standard, satisfy the requirements of POWER SUPPLY units for use in or with IT equipment normally covered by IEC 60950:1999 and/or IEC 60950-1:20

49、01. POWER SUPPLY units will also comply with the appropriate standard or application requirements given below if they also meet the additional requirements of the appropriate annex. PS-A Measurement, control and laboratory equipment normally covered by IEC 61010-1: 2001. PS-B Medical equipment (under consideration) normally covered by IEC 60601-1:2005. NOTE This annex will be based on IEC 60601-1:2005 (Third Edition)