Standards Development

Scope

This part of IEC 61204 specifies the electromagnetic compatibility (EMC) requirements for power supply units (PSUs) supplied by source voltages up to 1 000 V AC or 1 500 V DC providing AC and/or DC output(s), except inverter output(s) establishing AC mains (see exceptions)

NOTE Power supplies can provide accessory AC mains socket outlets, when such outputs are supplied from the AC mains.

This document covers:

–        both stand alone and component power supply units (PSUs) as defined in this document;

–        PSUs for use in or with IT equipment normally covered by IEC 62368-1:2023;

–        PSUs for use in or with measurement, control and laboratory equipment normally covered by IEC 61010-1:2010;

–        PSUs for use in or with medical equipment - normally covered by IEC 60601-1:2005;

–    PSUs for use in or with audio, video and similar electronic apparatus - normally covered by IEC 62368-1:2023;

–        DC power and distribution equipment and DC/DC converters.

–        Ringing generators used in telecoms applications.

This document does not apply to

–        motor-generator sets;

–        uninterruptible power supplies (UPS) covered by IEC 62040-1 [5];

–        PSUs covered by IEC 61558-1 [6] (i.e. power supply units incorporating safety isolating transformers providing SELV or PELV output(s) in accordance with IEC 60364-4-41 [7]) and PSUs for use with household and other consumer products, except those covered by IEC 62368-1:2023;

–        transformers covered by IEC 61558-1 [6];

–        step-down converters covered by IEC 60146-1-1:2024;

–        PSUs and converters intended for DC supplied bulb lamps, halogen lamps or LED lamps covered by CISPR 15 [8].

Where no standard for PSUs not listed above exists, use of this document for other applications is not precluded.

The object of this part of IEC 62104 is to specify EMC requirements and EMC test methods for PSUs. This includes limits for electromagnetic disturbances which can cause interference to other electronic equipment (e.g. radio receivers, measuring and computer devices), as well as electromagnetic immunity limits against continuous and transient conducted and radiated disturbances including electrostatic discharges.

This part of IEC 61204 defines the minimum electromagnetic compatibility requirements for PSUs.