61558-2-17-1997 Safety of Power Transformers@ Power Supply Units and Similar - Part 2: Particular Requirements for Transformers for Switch Mode Power Supplies (Edition 1.0)
Securite Des Transformateurs@ Blocs D?Alimentation Et Analogues - Partie 2: Regles Particulieres Pour Les Transformateurs Pour Alimentation A Decoupage (Edition 1.0)
Safety of Power Transformers@ Power Supply Units and Similar - Part 2: Particular Requirements for Transformers for Switch Mode Power Supplies (Edition 1.0) 是非强制性国家标准，您可以免费下载前三页
Replacement: This part 2 of IEC 61558 applies to associated power transformers for switch mode power supplies@ single-phase or polyphase@ air-cooled: ?C separating transformers; ?C isolating transformers; ?C safety isolating transformers@ having a rated supply voltage not exceeding 1000 V a.c. and a rated frequency of 500 Hz to 1 MHz@ the rated output not exceeding: ?C 10 kVA for single-phase transformers; ?C 16 kVA for polyphase transformers. NOTE 1 ?C For higher frequencies@ this standard may be used as a guide. The no-load output voltage or the rated output voltage do not exceed: ?C 1000 V a.c. or 1 415 V ripple-free d.c for separating transformers; ?C 500 V a.c. or 708 V ripple-free d.c for isolating transformers. NOTE 2 ?C For isolating transformers@ the rated output voltage may be up to 1000 V a.c. or 1415 V ripple-free d.c. in accordance with the national wiring rules or designed for special purposes. ?C 50 V a.c. r.m.s. and/or 120 V ripple-free d.c for safety isolating transformers. This standard is applicable to dry type transformers. The windings may be encapsulated or non-encapsulated. NOTES 3 For transformers filled with liquid dielectric or pulverized material@ such as sand@ additional requirements are under consideration. 4 In locations where special environmental conditions prevail@ particular requirements may be necessary in accordance with IEC 364-5-51. 5 For higher output no-load voltages@ additional requirements are necessary but this section may be used as a guide.?