低压浪涌保护装置 第41部分：直流低压电力系统用浪涌保护装置 要求和试验方法

[中文适用范围]： IEC 61643-41:2025适用于用于防护雷电间接和直接效应或其他瞬态过电压的浪涌保护装置。这些装置旨在连接至额定电压不超过1500 V DC的直流电源回路和设备中。本文件规定了这些装置的性能和安全要求、测试方法以及额定值。这些装置至少包含一个非线性元件，旨在限制浪涌电压并引导浪涌电流。本文件中提供的测试要求基于浪涌保护装置（SPD）连接至由提供线性电压-电流特性的电源供电的直流电源回路这一假设。当SPD需连接至不同类型的电源时，需慎重考虑。这主要适用于此类系统中预期的系统和故障条件（例如预期的短路电流、暂态过电压应力）。当相关产品标准在某一领域或某些应用中不存在时，本文件可应用于铁路应用。基于风险评估，可能不需要将本文件的所有要求应用于仅针对特定电力应用设计的SPD，例如低功率能力的电路、由非线性电源供电的电路、与公用电源有保护隔离的电路。注1：有关风险评估的更多信息请参见IEC指南116。本文件不涵盖光伏应用的SPD。注2：光伏应用的SPD由IEC 61643-31涵盖。注3：基于国家法规可能存在其他排除情况。本国际标准应与IEC 61643-01一并使用。 [外文原描述]： IEC 61643-41:2025 is applicable to devices for surge protection against indirect and direct effects of lightning or other transient overvoltages. These devices are intended to be connected to DC power circuits and equipment rated up to 1 500 V DC. Performance and safety requirements, tests and ratings are specified in this document. These devices contain at least one nonlinear component and are intended to limit surge voltages and divert surge currents. The test requirements provided by this document are based on the assumption that the SPD is connected to a DC power circuit fed by a power source providing a linear voltage-current characteristic. When the SPD is to be connected to a different kind of source, careful consideration is required. This mainly applies with regard to system and fault conditions to be expected in such a system (e.g. expected short circuit current, TOV-stresses). This document can apply for railway applications, when related product standards do not exist for that area or for certain applications. Based on a risk assessment it might not be necessary to apply all requirements of this document to SPDs designed for specific power applications only, e.g. circuits with a low power capability, circuits supplied by nonlinear sources, circuits with protective separation from the utility supply. NOTE 1 More information on risk assessment is provided in IEC Guide 116. SPDs for PV applications are not covered by this document. NOTE 2 Such SPDs for PV applications are covered by IEC 61643-31. NOTE 3 Other exclusions based on national regulations are possible. This International Standard is to be used in conjunction with IEC 61643-01.