PDF Standards IEC 61000-3-3 Ed. 3.2 en:2021
Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current ≤ 16 A per phase and not subject to conditional connection CONSOLIDATED EDITION
standard by International Electrotechnical Commission, 03/25/2021