IEC 62305-2:2024 雷电防护.第2部分:风险管理

标准编号：IEC 62305-2:2024

中文名称：雷电防护.第2部分:风险管理

英文名称：Protection against lightning - Part 2: Risk management

发布日期：2024-09-12

标准范围

IEC 62305-2:20 24适用于雷击对地造成的结构风险管理。其目的是提供评估此类风险的程序。一旦选择了风险的可容忍上限，该程序提供了一种选择适当保护措施的方法，以将风险降低到或低于可容忍上限。第三版取消并取代了2010年出版的第二版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更:a)引入了单一风险的概念，将人命损失和火灾损失结合起来。b)引入了可能损害结构内内部系统可用性的损伤频率的概念。c）在评估预期平均年危险事件数时，引入了雷电接地点密度NSG，取代了闪电闪光密度NG。d)可以通过使用通过符合IEC 62793的雷暴预警系统(TWS)激活的预防性临时措施来减少一些风险成分。考虑到使用TWS降低这种风险，已经引入了对开阔区域人员直接打击的风险。

IEC 62305-2:2024 is applicable to the risk management of a structure due to lightning flashes to earth.
Its purpose is to provide a procedure for the evaluation of such a risk. Once an upper tolerable limit for the risk has been selected, this procedure provides a means for the selection of appropriate protection measures to be adopted to reduce the risk to or below the tolerable limit.
This third edition cancels and replaces the second edition, published in 2010. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) The concept of a single risk, to combine loss of human life and loss due to fire, has been introduced.
b) The concept of frequency of damage that can impair the availability of the internal systems within the structure has been introduced.
c) The lightning ground strike-point density NSG has been introduced replacing the lightning flash density NG in the evaluation of expected average annual number of dangerous events.
d) Reduction of a few risk components can be achieved by the use of preventive temporary measures activated by means of a thunderstorm warning system (TWS) compliant with IEC 62793. The risk of direct strike to people in open areas has been introduced, considering the reduction of that risk using a TWS.

标准预览图