IEC 61557-3:2019 交流1000V和直流1500V以下低压配电系统的电气安全保护措施的试验、测量或监测设备第3部分:回路阻抗

标准编号：IEC 61557-3:2019

中文名称：交流1000V和直流1500V以下低压配电系统的电气安全保护措施的试验、测量或监测设备第3部分:回路阻抗

英文名称：Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 3: Loop impedance

发布日期：2019-07-26

标准范围

IEC 61557-3:20 19作为IEC 61557-3:20 19 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 61557-3:20 19规定了适用于测量线路导体和保护导体之间回路阻抗的设备的要求；在线路导体和中性线之间；或利用被测电路加载时的电压降在两个线路导体之间。IEC 61557-3:20 19取消并取代了2007年发布的第二版。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)增加有关测量类别的要求；b)增加了对操作说明的新要求；c)结构与整个IEC 61557系列的结构对齐。

IEC 61557-3:2019 is available as IEC 61557-3:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61557-3:2019 specifies the requirements applicable to equipment for measuring the loop impedance between a line conductor and protective conductor; between a line conductor and neutral; or between two line conductors by using the voltage drop when the circuit under test is loaded. IEC 61557-3:2019 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of equirements as regards the measurement category;
b) addition of new requirements for operating instructions;
c) alignment of the structure with that of the whole IEC 61557 series.

标准预览图