IEC 61204-3:2011 specifies electromagnetic compatibility (EMC) requirements for power supply units (PSUs) providing d.c. output(s) with or without auxiliary a.c. output(s), operating from a.c. or d.c. source voltages up to 600 V a.c. or 1 000 V d.c. The main changes with respect to the previous edition are listed below:- Update of the scope to align with IEC 61204-7.- Update of the normative references to the latest editions.- Change of the definitions of environments to align with the latest editions of the applicable normative references.- Revision of the applicability of tests to different power supply technologies.- Revision of the emission limits and requirements to align with the latest editions of the applicable normative references.- Revision of the immunity limits and requirements to align with the latest editions of the applicable normative references.- Clarification of the different classes of PSU.
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