Auxiliaries for lamps - D.C. or a.c. supplied electronic step-down convertors for filament lamps - Performance requirements
灯具附件.白炽灯用直流或交流供电的电子降压转换器.性能要求
Provides the lighting industry with performance requirements at 50 or 60 Hz for electronic step-down conbertors for use on D.C. supplies up to 250 volt or a.c. supplies up to 1000 volt with tungsten-halogen or other filament lamps.