标准摘要
[中文适用范围]: 本国际标准规定了隔离装置的设计、分析和鉴定要求,以确保冗余安全系统电路@或安全与较低等级电路@之间的电气独立性,如 IEC 60709 中所规定。本标准包括关于确定最大应用于隔离装置的可信故障。最大可信故障可以用作基于其他标准(例如IEC TS 61000-6-5或IEC 62003)的测试中使用的测试级别的基础。由于系统或子系统之间的信号交换或共享可能导致功能相互依赖性和可能的干扰或 CCF,因此该标准不解决安全或 CCF 问题。它还没有解决与隔离器件中的数字或可编程逻辑相关的设计或资格问题。对于包含数字或可编程逻辑的隔离器件,必须考虑额外的设计和资格要求;这些要求超出了本标准的范围。 [外文原描述]: IEC 62808:2015 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).
英文名称Nuclear power plants - Instrumentation and control systems important to safety - Design and qualification of isolation devices