Electromagnetic compatibility (EMC) - Part 3-11: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems - Equipment with rated current ≤ 75 A and subject to conditional connection

This document establishes technical limits concerning electromagnetic compatibility within public low-voltage electrical systems. It specifically addresses the constraints for voltage changes, fluctuations, and flicker generated by equipment with a rated current of 75 amperes or less. The scope covers devices that meet defined connection conditions to the supply network. The content provides necessary criteria to ensure that electrical installations do not suffer from power quality issues caused by the operation of connected loads. It serves as a reference for manufacturers and grid operators to maintain system stability and prevent disturbances that could affect other users. The text outlines the methodologies for assessing emissions and the specific thresholds that must not be exceeded. By adhering to these parameters, the risk of interference is minimized. This guidance helps in designing equipment that coexists harmoniously with the power distribution infrastructure. The information is applicable to the evaluation of compliance for various industrial and commercial devices connecting to the common mains supply. It ensures a unified approach to managing power quality across different regions.