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12部分:功率测量和监测装置（PMD）

[中文适用范围]： 本部分 IEC 61557 规定了组合性能测量功率计量和监测设备 (PMD) 的要求，这些设备测量和监测配电系统中的电气参数量，并可选其他外部信号。这些要求还定义了额定电压高达 1000 V AC 或 1500 V DC 的单相和三相 AC 或 DC 系统中的性能。 这些设备可以是固定安装或便携式，适用于室内和/或室外使用。本标准不适用于： 符合 IEC 62053-21、IEC 62053-22 和 IEC 62053-23 的电能计量设备。然而，本标准中定义的有功和无功能量测量的不确定度源自 IEC 62053 标准系列中定义的不确定度。简单的远程继电器或简单监测继电器。 本标准旨在与 IEC 61557-1（除非另有规定）一起使用，该标准规定了测量和监测设备的一般要求，如 IEC 60364-6 中所要求的。 本标准不包括 IEC 61557 第 2 至 9 部分或 IEC 62020 中定义的电气参数的测量和监测。 本文档中定义的组合性能测量功率计量和监测设备 (PMD) 提供了额外的安全信息，有助于验证安装并增强配电系统的性能。例如，这些设备有助于检查谐波水平是否符合 IEC 60364-5-52 要求的布线系统。 本文档中描述的用于电气参数的组合性能测量功率计量和监测设备 (PMD) 用于一般工业和商业应用。PMD-A 是符合 IEC 61000-4-30 A 类要求的特定 PMD，可用于“电能质量评估”应用。 本文档不涉及功能安全和网络安全方面。 IEC 60051（所有部分）涵盖的设备（直接作用模拟电测量仪器）。 注 1：通常此类设备用于以下应用或满足以下一般需求：安装内的能源管理，例如促进 ISO 50001 和 IEC 60364-8-1 等文件的实施；监测和/或测量可能需要或常见的电气参数；商业/工业设施内电能质量的测量和/或监测。 注 2：电气参数的测量和监测设备通常由多个功能模块组成。所有或部分功能模块组合在一个设备中。功能模块的示例如下： 同时测量和指示监测多个电气参数；能量测量和/或监测，有时符合建筑法规的某些方面；报警功能； 注 3：PMD 历史上称为功率表、功率监测器、功率监测设备、功率能量监测设备、功率分析仪、多功能表、测量多功能设备、能量表。 注 4：计量、测量和监测应用在附录 A 中解释。 [外文原描述]： IEC 61557-12:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 61557-12:2018 specifies requirements for power metering and monitoring devices (PMD) that measure and monitor the electrical quantities within electrical distribution systems, and optionally other external signals. These requirements also define the performance in single- and three-phase AC or DC systems having rated voltages up to 1 000 V AC or up to 1 500 V DC. These devices are fixed or portable. They are intended to be used indoors and/or outdoors. Power metering and monitoring devices (PMD), as defined in this document, give additional safety information, which aids the verification of the installation and enhances the performance of the distribution systems. The power metering and monitoring devices (PMD) for electrical parameters described in this document are used for general industrial and commercial applications. This document does not address functional safety and cyber security aspects. This document is not applicable for: – electricity metering equipment that complies with IEC 62053-21, IEC 62053-22, IEC 62053-23 and IEC 62053-24. Nevertheless, uncertainties defined in this document for active and reactive energy measurement are derived from those defined in IEC 62053 (all parts); – the measurement and monitoring of electrical parameters defined in IEC 61557-2 to IEC 61557-9 and IEC 61557-13 or in IEC 62020; – power quality instrument (PQI) according IEC 62586 (all parts); – devices covered by IEC 60051 (all parts) (direct acting analogue electrical measuring instrument). IEC 61557-12:2018 cancels and replaces the first 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) PMD-A has been withdrawn due the fact these devices are now mainly covered by the IEC 62586 series of standards. b) Three categories of PMD have been created with a list of minimum required functions for each category. c) Added a new Annex A explaining the different applications linked to the relevant standards and devices, and another new Annex C about the power factor conventions. The contents of the corrigendum 1 (2022-09) have been included in this copy.