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S+ IEC 61000-3-3 Ed. 3.0 en:2013 (Redline version)
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
International Electrotechnical Commission [iec]