BS-IEC-61225-2005.pdf
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1、BRITISH STANDARD BS IEC 61225:2005 Nuclear power plants Instrumentation and control systems important to safety Requirements for electrical supplies ICS 27.120.20 ? Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 07:16:18 GMT+00:00 2007, Uncontrolled Copy, (c) B
2、SI BS IEC 61225:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2006 BSI 31 January 2006 ISBN 0 580 47629 4 National foreword This British Standard reproduces verbatim IEC 61225:2005 and implements it as the UK national standa
3、rd. It supersedes BS 7674:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee NCE/8, Reactor instrumentation, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enqui
4、ries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British
5、Standards which implement international publications referred to 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 public
6、ation does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover
7、, the IEC title page, The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments pages 2 to 32, an inside back cover and a back cover. Licensed Copy: London South Bank University, London South Bank Univer
8、sity, Thu Mar 01 07:16:18 GMT+00:00 2007, Uncontrolled Copy, (c) BSI CEI IEC INTERNATIONAL STANDARD 61225 Second edition 2005-12 Nuclear power plants Instrumentation and control systems important to safety Requirements for electrical supplies Reference number CEI/IEC 61225:2005 Licensed Copy: London
9、 South Bank University, London South Bank University, Thu Mar 01 07:16:18 GMT+00:00 2007, Uncontrolled Copy, (c) BSI CONTENTS 0 Introduction .6 1 Scope8 2 Normative references 8 3 Terms and definitions9 4 System requirements . 10 4.1 Function and description 10 4.2 System divisions 10 4.3 System bou
10、ndaries . 10 5 Requirements for redundancy, physical separation, and independence . 11 5.1 General 11 5.2 Redundancy . 11 5.3 Physical separation 11 5.4 Independence 11 5.5 Reliability . 12 6 Functional requirements for I any IEC National Committee interested in the subject dealt with may participat
11、e in this preparatory work. International, governmental and non- governmental 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
12、 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 subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications
13、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 technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any m
14、isinterpretation by any end user. 4) In order to promote international uniformity, 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 na
15、tional 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 any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest editi
16、on 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 committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether dire
17、ct 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. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensa
18、ble 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 rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61225 has b
19、een prepared by subcommittee 45A: Instrumentation and control of nuclear facilities, of IEC technical committee 45: Nuclear instrumentation. This second edition cancels and replaces the first edition published in 1993. This edition constitutes a technical revision. This edition includes the followin
20、g significant technical changes with respect to the previous edition: a) general update of all the references in Clause 2 and throughout the text of this standard; b) addition of references to IEC 62138, IEC 61513, and IEC 60880; 4 BS IEC 61225:2005 Licensed Copy: London South Bank University, Londo
21、n South Bank University, Thu Mar 01 07:16:18 GMT+00:00 2007, Uncontrolled Copy, (c) BSI c) addition of software programme design, categorization, verification, and validation requirements; d) addition of the recommendation to avoid parallel connection of batteries from more than one division; e) add
22、ition of the requirement that, when batteries are connected in parallel under abnormal operating conditions, they shall be properly protected with isolation devices to avoid any failure that may impair more than one division; f) editorial changes throughout the standard to improve comprehension and
23、clarity; g) correction of minor errors in Figures 1, 4, and 5; h) addition of more typical performance characteristics to the examples in Annex A for reference purposes, adherence to these values being at the discretion of the users. The text of this standard is based on the following documents: FDI
24、S Report on voting 45A/595/FDIS 45A/602/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 accordance with the ISO/IEC Directives, Part 2. The committee has decided that the cont
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