BS EN 61558-2-5:2010

1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 General notes on tests
6 Ratings
7 Classification
8 Marking and other information
9 Protection against electric shock
10 Change of input voltage setting
11 Output voltage and output current under load
12 No-load output voltage
13 short-circuit voltage
14 Heating
15 Short-circuit and overload protection
16 Mechanical strength
17 Protection against harmful ingress of dust, solid
   objects and moisture
18 Insulation resistance, dielectric strength, and
   leakage current
19 Construction
20 Components
21 Internal wiring
22 Supply connection and other external flexible cables
   or cords
23 Terminals for external conductors
24 Provision for protective earthing
25 Screws and connections
26 Creepage distances, clearances and distances through
   insulation
27 Resistance to heat, fire, and tracking
28 Resistance to rusting
Annexes
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Specifies with the safety of shaver transformers, power supply units incorporating a shaver transformer, and shaver supply units.

Replacement:

This part of IEC61558deals with the safety of shaver transformers, power supply unitsincorporating a shaver transformer, and shaver supply units. Shaver transformersincorporating electronic circuitsare also covered by this standard.

NOTE1 Safety includes electrical, thermal, mechanical and chemical aspects.

Unless otherwise specified, from here onward, the term transformercovers shaver transformersand power supply unitsincorporating shaver transformersand shaver supply units.

This part is applicable to stationary,single phase air-cooled (natural or forced), independentor associated dry-type transformers.The windings may be encapsulated or non-encapsulated.

This standard is applicable to transformersand power supply(linear) with internal operational frequenciesnot exceeding 500Hz.

This standard used in combination with Part2-16 for switch mode power supply units(SMPS) is also applicable to power supplies with internal operational frequencieshigher than 500Hz. Where the two requirements are in conflict the most severe take precedence.

The rated supply voltagedoes not exceed 250V a.c., and the rated supply frequencydoes not exceed 500Hz.

The rated outputis not less than 20 VA and does not exceed 50 VA.

The no-load output voltagedoes not exceed 275V a.c and the rated output voltagedoes not exceed 250V a.c.

This part is not applicable to external circuits and their components intended to be connected to the input and output terminals or socket-outlets of the transformers.

Transformerscovered by this part are used in applications where doubleor reinforced insulationbetween circuits is required by the installation rules for bathrooms and similar locations, or by the appliance specifications.

NOTE2 Transformerscovered by this part may be flush or surface mounted or incorporated in luminaires, mirrors, and other equipment containing one or more socket-outlet(s).

NOTE3 Attention is drawn to the following:

• for transformersintended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.) may be necessary;

• measures to protect the enclosureand the components inside the enclosureagainst external influences such as fungus, vermin, termites, solar-radiation, and icing should also be considered;

• the different conditions for transportation, storage, and operation of the transformersshould also be considered;

• additional requirements in accordance with other appropriate standards and national rules may be applicable to transformersintended for use in special environments.

NOTE4 Future technological development of transformersmay necessitate a need to increase the upper limit of the frequencies, until then this part may be used as a guidance document.