This international Standard describes a method for specifying requirements for low-voltage power supply devices (including switching types) providing d.c. output(s) up to 200 V d.c. at a power level of up to 30 kW, operating from a.c. or d.c. source voltages of up to 600 V. The devices are for use within class I equipment or for free-standing operation when used with adequate electrical and mechanical protection.
This standard is intended to cover all types of a.c. or d.c. driven power supply with any number of outputs, especially in case of unknown final application.
When power supplies are developed as components of an equipment covered by specific product standards, these standards apply; if the performance characteristics of the power supplies are not sufficiently covered by the product standards, additional specifications taken out of this standard shall by used.
This standard permits to specify a power unit to meet a particular application by the specification of parameters at required performance levels, to establish the essential definitions related to this type of equipment, and to establish a selection of levels of performance. These levels are carefully graded to enable manufacturers and users to select and specify a range of power supply devices suitable for their application.