This part of IEC 61347 specifies particular safety requirements for electronic step-down
convertors for use on d.c. supplies of up to 250 V or a.c. supplies of up to 1 000 V, at 50 Hz or
60 Hz and with rated output voltage = 50 V r.m.s. at a frequency deviating from the supply
frequency, or 120 V ripple free d.c. between conductors and between any conductor and earth,
associated with tungsten-halogen lamps as specified in IEC 60357 and other filament lamps.
Particular requirements for electronic step-down convertors with means of protection against
overheating are given in Annex C.
Particular additional requirements for convertors providing safety extra low voltage (hereinafter
SELV), 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.