本标准采用IEC 61347-2-2:2011，并对澳大利亚和新西兰进行了修改，该标准规定了在直流电源高达250 V或交流电源高达1000 V、频率为50 Hz或60 Hz、额定输出电压为50 V r.m.s、频率偏离电源频率的情况下使用的电子降压转换器的特殊安全要求，或与IEC 60357中规定的卤钨灯和其他白炽灯相关的导体之间以及任何导体和接地之间的120 V无纹波直流电。

This Standard adopts IEC 61347-2-2:2011 with modifications for Australia and New Zealand, which 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.