International Electrotechnical Commission

Low-voltage power supplies, d.c. output – Part 3: Electromagnetic compatibility (EMC) - Edition 2.0
 N 61204-3

Annotation

Equipment covered by this standard

This part of IEC 61204 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. (see exceptions under 1.1.3.)

NOTE Ringing generators used in telecoms applications are covered by this standard.

This product standard covers both stand alone and component power supply units as defined in this standard. It covers PSU units for use in or with IT equipment normally covered by IEC 60950-1:20011 and/or IEC 60950-1:2005; PSU units for use in or with measurement, control and laboratory equipment normally covered by IEC 61010-1; PSU units for use in or with medical equipment – normally covered by IEC 60601-1; PSU units for use in or with audio, video and similar electronic apparatus – normally covered by IEC 60065. It also covers d.c. power and distribution equipment and d.c./d.c. converters.

Where no standard exist, use of this standard for other applications is not precluded.

Additional requirements

Requirements additional to those specified in this standard may be necessary for

– PSUs intended for operation in special environments (for example, extremes of temperature; excessive dust, moisture or vibration; flammable gases; and corrosive or explosive atmospheres);

– PSUs intended to be used in vehicles, on board ships or aircraft, or in tropical countries;