Lamp controlgear - Part 2-2: Particular requirements for d.c. or a.c. supplied electronic step-down convertors for filament lamps (Incorporates Amendment A2: 2006; Incorporating Corrigenda July 2003 and November 2006)
This part of IEC 61347 specifies particular safety requirements for electronic step-down convertors for use on d.c. supplies up to 250 V or a.c. supplies up to 1 000 V at 50 Hz or 60 Hz and rated output voltage <50 V r.m.s. at a frequency deviating from the supply frequency or <50 ??2 V unsmoothed d.c. between conductors or between any conductor and earth@ associated with tungsten-halogen lamps as specified in IEC 60357 and other filament lamps. NOTE The limit of 50 V rated output voltage is in accordance with band I of IEC 60449. Particular requirements for electronic step-down convertors with means of protection against overheating are given in annex C. Particular requirements for stationary independent SELV convertors@ which are part of the wiring in installations@ are given in annex I. Performance requirements are covered by IEC 61047. Plug-in convertors@ being part of the luminaire@ are covered as for built-in convertors by the additional requirements of the luminaire standard.