标准摘要
[中文适用范围]： 本国际标准规定了用于确保冗余安全系统电路之间或安全电路与低等级电路之间电气独立性的隔离装置的设计、分析和鉴定要求，如IEC 60709中所规定。本标准包括关于确定应用于隔离装置的最大可信故障的指导。最大可信故障可用作基于其他标准（如IEC TS 61000-6-5或IEC 62003）的测试水平的依据。本标准不涉及由于功能相互依赖性和可能由系统或子系统之间的信号交换或共享引起的干扰或CCF问题。它也不涉及与隔离装置中的数字或可编程逻辑相关的设计或鉴定问题。对于包含数字或可编程逻辑的隔离装置，必须考虑额外的设计和鉴定要求；这些要求不在本标准的范围内。 [外文原描述]： IEC 62808:2015+A1:2018 establishes requirements for the design, analysis and qualification of isolation devices used to ensure electrical independence of redundant safety system circuits, or between safety and lower class circuits, as specified in IEC 60709. This standard includes guidance on the determination of the maximum credible fault that is applied to the isolation devices. The maximum credible fault can be used as a basis for the test levels used in testing based on other standards (e.g. IEC TS 61000-6-5 or IEC 62003). This consolidated version consists of the first edition (2015) and its amendment 1 (2018). Therefore, no need to order amendment in addition to this publication.
英文名称Nuclear power plants - Instrumentation and control systems important to safety - Design and qualification of isolation devices