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
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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
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