标准摘要
[中文适用范围]: IEC 61508 的本部分包含有关 IEC 61508-2 和 IEC 61508-3 的信息和指南。 – 附件 A 简要概述了 IEC 61508-2 和 IEC 61508-3 的要求,并列出了其应用中的功能步骤。 – 附件 B 给出了计算硬件故障概率的示例技术,应结合 IEC 61508-2 的 7.4.3 和附件 C 以及附件 D 进行阅读。 – 附件 C 给出了计算诊断覆盖率的工作示例,并应结合请结合 IEC 61508-2 的附录 C 阅读。 – 附件D给出了量化硬件相关共因故障对故障概率的影响的方法。 – 附件 E 给出了 IEC 61508-3 附件 A 中规定的安全完整性等级 2 和 3 的软件安全完整性表的应用实例。1.2 IEC 61508-1、IEC 61508-2、IEC 61508-3 和 IEC 61508 -4 是基本安全出版物,尽管此状态不适用于低复杂性 E/E/PE 安全相关系统(参见 IEC 61508-4 的 3.4.3)。作为基本安全出版物,它们旨在供技术委员会根据 IEC 指南 104 和 ISO/IEC 指南 51 中包含的原则制定标准。 IEC 61508-1、IEC 61508-2、IEC 61508-3 和IEC 61508-4 也可用作独立出版物。本国际标准的水平安全功能不适用于符合IEC 60601系列的医疗设备。1.3 技术委员会的职责之一是,在适用的情况下,在编写其出版物时利用基本安全出版物。在这种情况下,除非特别提及或包含在这些技术委员会准备的出版物中,否则本基本安全出版物的要求、测试方法或测试条件将不适用。1.4 图1显示了IEC 61508系列的总体框架,并表明了IEC 61508-6在实现E/E/PE安全相关系统的功能安全方面所发挥的作用。 [外文原描述]: Looking for deeper insights? Check out IEC 61508:2010 CMV , which includes commented versions of Parts 1 to 7 of IEC 61508. These commented versions highlight the changes made from previous editions and provide explanations from a world-leading expert on the reasons behind the most significant changes. IEC 61508-6:2010 contains information and guidelines on IEC 61508-2 and IEC 61508 3. Annex A gives a brief overview of the requirements of IEC 61508-2 and IEC 61508-3 and sets out the functional steps in their application. Annex B gives an example technique for calculating the probabilities of hardware failure and should be read in conjunction with 7.4.3 and Annex C of IEC 61508-2 and Annex D. Annex C gives a worked example of calculating diagnostic coverage and should be read in conjunction with Annex C of IEC 61508-2. Annex D gives a methodology for quantifying the effect of hardware-related common cause failures on the probability of failure. Annex E gives worked examples of the application of the software safety integrity tables specified in Annex A of IEC 61508-3 for safety integrity levels 2 and 3. This second edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. It has been subject to a thorough review and incorporates many comments received at the various revision stages. This publication is of high relevance for Smart Grid.
英文名称Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3 (see Functional Safety and IEC 61508)