BS EN 61558-2-5:2010 Safety of transformers, reactors, power supply units and combinations thereof. Part 2-5: Particular requirements and tests for transformer for shavers, power supply units for shavers and shaver supply units
This part of IEC 61558 deals with the safety of shaver transformers, power supply units
incorporating a shaver transformer, and shaver supply units. Shaver transformers
incorporating electronic circuits are 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 shaver
transformers and power supply units incorporating shaver transformers and shaver
supply units.
This part is applicable to stationary, single phase air-cooled (natural or forced), independent
or associated dry- type transformers. The windings may be encapsulated or nonencapsulated.
This standard is applicable to transformers and power supply (linear) with internal
operational frequencies not exceeding 500 Hz.
This standard used in combination with Part 2-16 for switch mode power supply units
(SMPS) is also applicable to power supplies with internal operational frequencies higher than
500 Hz. Where the two requirements are in conflict the most severe take precedence.
The rated supply voltage does not exceed 250 V a.c., and the rated supply frequency does
not exceed 500 Hz.
The rated output is not less than 20 VA and does not exceed 50 VA .
The no-load output voltage does not exceed 275 V a.c and the rated output voltage does
not exceed 250 V 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.
Transformers covered by this part are used in applications where double or reinforced
insulation between circuits is required by the installation rules for bathrooms and similar
locations, or by the appliance specifications.
NOTE 2 Transformers covered by this part may be flush or surface mounted or incorporated in luminaires,
mirrors, and other equipment containing one or more socket-outlet(s).
NOTE 3 Attention is drawn to the following:
- for transformers intended 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 enclosure and the components inside the enclosure against 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 transformers should also be
considered;
- additional requirements in accordance with other appropriate standards and national rules may be applicable to
transformers intended for use in special environments.
NOTE 4 Future technological development of transformers may necessitate a need to increase the upper limit of
the frequencies, until then this part may be used as a guidance document.
BS EN 61558-2-5:2010 history
2010BS EN 61558-2-5:2010 Safety of transformers, reactors, power supply units and combinations thereof. Part 2-5: Particular requirements and tests for transformer for shavers, power supply units for shavers and shaver supply units
2006BS EN 61558-1:2005+A1:2009 Safety of power transformers, power supplies, reactors and similar products — Part 1: General requirements and tests
2006BS EN 61558-1:2005 Safety of power transformers, power supplies, reactors and similar products - Part 1: General requirements and tests
1998BS EN 61558-1:1998 Safety of power transformers, power supply units and similar - General requirements and tests
1996BS EN 60742:1996 Isolating transformers and safety isolating transformers - Requirements