DANSK DSF/FPREN 61557-12 PDF

This part of IEC 61557 specifies requirements for Power Metering and monitoring Devices (PMD) that measure and monitor the electrical quantities within electrical distribution systems, and optionally others external signals.. 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,IEC 62053-23 and IEC 62053-24. Nevertheless, uncertainties defined in this standard for active and reactive energy measurement are derived from those defined in the IEC 62053 standards series. – the measurement and monitoring of electrical parameters defined in Parts 2 to 9 and part 13 of IEC 61557 or in IEC 62020 – power quality instrument (PQI) according the IEC 62586 series of standards. – devices covered by series of standards IEC 60051 (direct acting analogue electrical measuring instrument)