交流1000V和直流1500V以下低压配电系统的电气安全.保护措施的测试、测量或监测用设备.第12部分:性能测量和监测装置(PMD)

[中文适用范围]： IEC 61557 的这一部分规定了测量和监控配电系统内电气参数的组合性能测量和监控设备的要求。这些要求还定义了额定电压高达 1 000 V 交流或高达 1 500 V 直流的单相和三相交流或直流系统的性能。这些设备可以是固定安装的，也可以是便携式的。它们适合在室内和/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电能测量的不确定性源自 IEC 62053 标准系列中定义的不确定性。 • 简单的远程继电器或简单的监控继电器。本标准旨在与 IEC 61557-1 结合使用（除非另有规定），后者规定了 IEC 60364-6 中测量和监控设备的一般要求。该标准不包括 IEC 61557 第 2 至 9 部分或 IEC 62020 中定义的电气参数的测量和监控。本标准中定义的组合性能测量和监控设备 (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仍符合 IEC 60364-5-52 要求的接线系统。本标准中描述的电气参数组合性能测量和监测装置（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。注 1：一般来说，此类设备用于以下应用或满足以下一般需求： – 装置内部的能源管理； – 可能需要或通常的电气参数的监视和/或测量； – 能源质量的测量和/或监测。注2：电气参数的测量和监测装置通常由多个功能模块组成。全部或部分功能模块组合在一台设备中。功能模块的示例如下： – 同时测量和指示多个电气参数； – 能源测量和/或监测，有时还遵守建筑法规的各个方面； – 报警功能； – 电能质量（谐波、过压/欠压、电压骤降和骤升等）。 [外文原描述]： Specifies requirements for combined performance measuring and monitoring devices that measure and monitor the electrical parameters within electrical distribution systems. These requirements also define the performance, in single and three-phase a.c. or d.c. systems having rated voltages up to 1 000 V a.c. or up to 1 500 V d.c. These devices are fixed installed or portable. They are intended to be used indoors and/or outdoors. This standard is not applicable for: - electricity metering equipment that complies with IEC 62053-21, IEC 62053-22 and IEC 62053-23. Nevertheless, uncertainties defined in this standard for active and reactive energy measurement are derived from those defined in the IEC 62053 standards series. - simple remote relays or simple monitoring relays. This standard is intended to be used in conjunction with IEC 61557-1 (unless otherwise specified), which specifies the general requirements for measuring and monitoring equipment, as required in IEC 60364-6. The standard does not include the measurement and monitoring of electrical parameters defined in Parts 2 to 9 of IEC 61557 or in IEC 62020. Combined performance measuring and monitoring devices (PMD), as defined in this standard, give additional safety information, which aids the verification of the installation and enhances the performance of the distribution systems. For instance, those devices help to check if the level of harmonics is still compliant with the wiring systems as required in IEC 60364-5-52. The combined performance measuring and monitoring devices (PMD) for electrical parameters described in this standard are used for general industrial and commercial applications. A PMD-A is a specific PMD complying with requirements of IEC 61000-4-30 class A, which may be used in "power quality assessment" applications.