IEC 61558-2-17:1997
Safety of power transformers, power supply units and similar - Part 2: Particular requirements for transformers for switch mode power supplies
- Standard No.
- IEC 61558-2-17:1997
- Release Date
- 1997
- Published By
- International Electrotechnical Commission (IEC)
- Status
- Latest
- IEC 61558-2-17:1997
- Replace By
- IEC 61558-2-16:2009
- Scope
- Replacement: This part 2 of IEC 61558 applies to associated power transformers for switch mode power supplies, single-phase or polyphase, air-cooled: - separating transformers; - isolating transformers; - 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: - 10 kVA for single-phase transformers; - 16 kVA for polyphase transformers. NOTE 1 - For higher frequencies, this standard may be used as a guide. The no-load output voltage or the rated output voltage do not exceed: - 1000 V a.c. or 1 415 V ripple-free d.c for separating transformers; - 500 V a.c. or 708 V ripple-free d.c for isolating transformers. NOTE 2 - 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. - 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.
IEC 61558-2-17:1997 history
- 1997 IEC 61558-2-17:1997 Safety of power transformers, power supply units and similar - Part 2: Particular requirements for transformers for switch mode power supplies
