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 12: Power metering and monitoring d

The standard covers the electrical safety of low voltage distribution systems, equipment for testing, measuring or monitoring protective measures, and specific performance requirements for power metering and monitoring devices (PMD). It defines terms, symbols, and notations related to uncertainty, electric phenomena, measurement techniques, and provides detailed requirements on functions such as active, reactive, apparent power measurements, frequency, RMS voltage, current, and various other electrical parameters. Additionally, it outlines general mechanical, safety, EMC, and marking requirements for PMD.