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 978-0-626-21075-5 SANS 61800-5-2:2008Edition 1IEC 61800-5-2:2007Edition 1SOUTH AFRICAN NATIONAL STANDARD Adjustable speed electrical power drive sys
4、tems Part 5-2: Safety requirements Functional This national standard is the identical implementation of IEC 61800-5-2:2007 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0
5、001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 61800-5-2:2008 Edition 1 IEC 61800-5-2:2007 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA TC 69,
6、Power electronics and alternative energy conversion, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in July 2008. INTERNATIONAL STANDARD IEC61800-5-2First edition2007-07Adjustable speed electrical power d
7、rive systems Part 5-2: Safety requirements Functional XB For price, see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission SANS 61800-5-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of t
8、he SABS . 2 61800-5-2 IEC:2007(E) CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope and object8 2 Normative references .9 3 Terms and definitions .10 4 Designated safety functions15 4.1 General .15 4.2 Safety functions 16 4.2.1 Limit values .16 4.2.2 Stopping functions.16 4.2.3 Other safety functions17 5 M
9、anagement of functional safety 18 5.1 Objective.18 5.2 PDS(SR) development lifecycle.18 5.3 Functional safety planning.19 5.4 Safety requirements specification (SRS) for a PDS(SR) 21 5.4.1 General .21 5.4.2 Safety functionality requirements specification 21 5.4.3 Safety integrity requirements specif
10、ication.22 6 Requirements for design and development of a PDS(SR) .22 6.1 General requirements22 6.1.1 Change in operational status .22 6.1.2 Design standards.22 6.1.3 Realisation 23 6.1.4 Safety integrity and fault detection.23 6.1.5 Safety and non-safety functions.23 6.1.6 SIL to be used .23 6.1.7
11、 Software requirements.23 6.1.8 Review of requirements .23 6.1.9 Design documentation .24 6.2 PDS(SR) design requirements.24 6.2.1 Requirements for probability of dangerous random hardware failures per hour (PFH) 24 6.2.2 Architectural constraints 26 6.2.3 Estimation of safe failure fraction (SFF).2
12、8 6.2.4 Requirements for systematic safety integrity of a PDS(SR) and PDS(SR) subsystems 28 6.2.5 Electromagnetic (EM) immunity requirement of a PDS(SR)31 6.3 Behaviour on detection of fault 31 6.3.1 Fault detection.31 6.3.2 Fault tolerance greater than zero.32 6.3.3 Fault tolerance zero.32 6.4 Addi
13、tional requirements for data communications32 6.5 PDS(SR) integration and testing requirements 33 6.5.1 Hardware integration .33 SANS 61800-5-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61800-5-2 IEC:2007(E) 3 6.5.2 Software integra
14、tion 33 6.5.3 Modifications during integration .33 6.5.4 Applicable integration tests33 6.5.5 Test documentation .34 7 Information for use .34 7.1 Information and instructions for safe application of a PDS(SR)34 8 Verification and validation 35 8.1 General .35 8.2 Verification 36 8.3 Validation 36 8
15、.4 Documentation 36 9 Test requirements 36 9.1 Planning of tests .36 9.2 Test documentation.36 10 Modification37 10.1 Objective.37 10.2 Requirements37 10.2.1 Modification request 37 10.2.2 Impact analysis37 10.2.3 Authorization .37 10.2.4 Documentation 37 Annex A (informative) Sequential task table.
16、38 Annex B (informative) Example for determination of PFH.41 Annex C (informative) Available failure rate databases 52 Annex D (informative) Fault lists and fault exclusions 54 Bibliography64 Figure 1 Functional elements of a PDS(SR) .9 Figure 2 PDS(SR) development lifecycle19 Figure 3 Architectures
17、 for data communication ( a) White channel; b) Black channel) 33 Figure B.1 Example PDS(SR) 41 Figure B.2 Subsystems of the PDS(SR) .42 Figure B.3 Function blocks of subsystem A/B.43 Figure B.4 Reliability model (Markov) of subsystem A/B.46 Figure B.5 Function blocks of subsystem PS/VM48 Figure B.6
18、Reliability model (Markov) of subsystem PS/VM .50 Table 1 Alphabetical list of definitions 11 Table 2 Safety integrity levels: target failure measures for a PDS(SR) safety function .24 Table 3 Hardware safety integrity: architectural constraints on type A safety-related subsystems.27 Table 4 Hardwar
19、e safety integrity: architectural constraints on type B safety-related subsystems.28 SANS 61800-5-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 61800-5-2 IEC:2007(E) Table B.1 Determination of DC factor of subsystem A/B.45 Table B.
20、2 PFH value calculation results for subsystem A/B47 Table B.3 Determination of DC factor of subsystem A/B.48 Table B.4 PFH value calculation results for subsystem PS/VM.51 Table D.1 Conductors/cables .55 Table D.2 Printed wiring boards/assemblies.55 Table D.3 Terminal block .56 Table D.4 Multi-pin c
21、onnector 56 Table D.5 Electromechanical devices (for example relay, contactor relays)57 Table D.6 Transformers .57 Table D.7 Inductances .58 Table D.8 Resistors .58 Table D.9 Resistor networks 58 Table D.10 Potentiometers.59 Table D.11 Capacitors .59 Table D.12 Discrete semiconductors (for example d
22、iodes, Zener diodes, transistors, triacs, GTO thyristors, IGBTs, voltage regulators, quartz crystal, phototransistors, light-emitting diodes LEDs).59 Table D.13 Optocouplers .60 Table D.14 Non-programmable integrated circuits60 Table D.15 Programmable and/or complex integrated circuits 61 Table D.16
23、 Motion and position feedback sensors .62 SANS 61800-5-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61800-5-2 IEC:2007(E) 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS Part 5-2: Safety
24、requirements Functional FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concernin
25、g 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 Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their pr
26、eparation 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 organizations liaising with the IEC also participate in this preparation. IEC collaborates closel
27、y 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 technical matters express, as nearly as possible, an international consensus of opinion on the relevant
28、 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 IEC National Committees in that sense. While all reasonable efforts are made to ensure that the tech
29、nical 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 uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum ext
30、ent 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) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for a
31、ny 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, employees, servants or agents including individual experts and members of its technical committee
32、s 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 of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
33、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 the possibility that some of the elements of this IEC Publication may be the subject of patent ri
34、ghts. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61800-5-2 has been prepared by subcommittee 22G: Adjustable speed electric drive systems incorporating semiconductor power converters, of IEC technical committee 22: Power electronic sys
35、tems and equipment. The text of this standard is based on the following documents: FDIS Report on voting 22G/179/FDIS 22G/182/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 publication has been drafted in a
36、ccordance with the ISO/IEC Directives, Part 2. SANS 61800-5-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 6 61800-5-2 IEC:2007(E) A list of all parts of the IEC 61800 series, published under the general title Adjustable speed electri
37、c drive systems, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the pub
38、lication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. SANS 61800-5-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61800-5-2 IEC:2007(E
39、) 7 INTRODUCTION As a result of automation, demand for increased production and reduced operator physical effort, control systems of machinery and plant items play an increasing role in the achievement of overall safety. These control systems increasingly employ complex electrical/ electronic/progra
40、mmable electronic devices and systems. Prominent amongst these devices and systems are adjustable speed electrical power drive systems (PDS) that are suitable for use in safety-related applications (PDS(SR). Examples of industrial applications are: machine tools, robots, production test equipment, t
41、est benches; papermaking machines, textile production machines, calendars in the rubber industry; process lines in plastics, chemicals or metal production, rolling-mills; cement crushing machines, cement kilns, mixers, centrifuges, extrusion machines; drilling machines; conveyors, materials handling
42、 machines, hoisting equipment (cranes, gantries, etc); pumps, fans, etc. This standard can also be used as a reference for developers using PDS(SR) for other applications. Users of this standard should be aware that some type C standards for machinery currently refer to ISO 13849-1 for safety-relate
43、d control systems. In this case, PDS(SR) manufacturers may be requested to provide further information (e.g. category and/or performance level) to facilitate the integration of a PDS(SR) into the safety-related control systems of such machinery. NOTE ”Type C standards” are defined in ISO 12100-1 as
44、machine safety standards dealing with detailed safety requirements for a particular machine or group of machines. Previously, in the absence of standards, there has been a reluctance to accept electronic, and in particular programmable electronic, devices and systems in safety-related functions beca
45、use of uncertainty regarding the safety performance of such technology. There are many situations where control systems that incorporate a PDS(SR) are employed, for example as part of safety measures that have been provided to achieve risk reduction. A typical case is guard interlocking in order to
46、exclude personnel from hazards where access to the danger zone is only possible when rotating parts have attained a safe condition. This part of IEC 61800 gives a methodology to identify the contribution made by a PDS(SR) to identified safety functions and to enable the appropriate design of the PDS
47、(SR) and verification that it meets the required performance. Measures are given to co-ordinate the safety performance of the PDS(SR) with the intended risk reduction taking into account the probabilities and consequences of its random and systematic faults. SANS 61800-5-2:2008This s tandard may onl
48、y be used and printed by approved subscription and freemailing clients of the SABS . 8 61800-5-2 IEC:2007(E) ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS Part 5-2: Safety requirements Functional 1 Scope and object This part of IEC 61800 specifies requirements and makes recommendations for the des
49、ign and development, integration and validation of PDS(SR)s in terms of their functional safety considerations. It applies to adjustable speed electric drive systems covered by the other parts of the IEC 61800 series of standards. NOTE 1 The term “integration” refers to the PDS(SR) itself, not to its incorporation into the safety-related application. This International Standard is only applicable wher
