標準號：BS EN 61558-2-9-2011
中文標準名稱：電力變壓器,電抗器,供電機組及其組合的安全性.Ⅲ類手用鎢絲燈變壓器和供電機組的詳細要求和試驗
英文標準名稱：Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for transformers and power supply units for class III handlamps for tungsten filament lamps
標準類型：K41
發布日期：2011/3/30 12:00:00
實施日期：2011/3/30 12:00:00
中國標準分類號：K41
國際標準分類號：29.180
適用范圍：Replacement:This part of IEC 61558 deals with the safety of transformers for class III handlamps fortungsten filament lamps and power supply units incorporating transformers for class IIIhandlamps for tungsten filament lamps. Transformers incorporating electronic circuitsare also covered by this standard.NOTE 1 Safety includes electrical, thermal, mechanical and chemical aspects.Unless otherwise specified, from here onward, the term transformer covers transformers forclass III handlamps for tungsten filament lamps and power supply units incorporatingtransformers for class III handlamps for tungsten filament lamps.This part is applicable to stationary or portable single-phase air-cooled (natural or forced)independent or associated dry-type transformers. The windings may be encapsulated ornon-encapsulated.This standard is applicable to transformers and power supply (linear) with internaloperational frequencies not exceeding 500 Hz.This standard used in combination with Part 2-16 for switch mode power supply (SMPS)units is also applicable to power supplies with internal operational frequencies higher than500 Hz. Where the two requirements are in conflict, the most severe take precedence.The rated supply voltage does not exceed 1 000 V a.c., and the rated supply frequencyand the internal operational frequencies do not exceed 500 Hz.Transformers for class III handlamps for tungsten filament lamps have the followingadditional characteristics:– the no-load output voltage and the rated output voltage do not exceed 50 V a.c. or120 V ripple-free d.c.;– there is only a small difference between the no-load voltage and the rated outputvoltage.The rated output does not exceed:– 10 kVA.This part is not applicable to external circuits and their components intended to be connectedto the input terminals and output terminals of the transformers.Transformers covered by this part are used in applications where double or reinforcedinsulation between circuits is required by the installation rules or by the end productstandard.NOTE 2 Attention is drawn to the following:- for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (fromother applicable standards, national rules, etc.) may be necessary;- measures to protect the enclosure and the components inside the enclosure against external influences suchas fungus, vermin, termites, solar-radiation, and icing should also be considered;- the different conditions for transportation, storage, and operation of the transformers should also beconsidered;- additional requirements in accordance with other appropriate standards and national rules may be applicable totransformers intended for use in special environments.NOTE 3 Future technological development of transformers may necessitate a need to increase the upper limit ofthe frequencies, until then this part may be used as a guidance document.