EN 61558-2-5:1998

SLOVENSKI STANDARD
01-julij-1999
Safety of power transformers, power supply units and similar - Part 2-5: Particular
requirements for shaver transformers and shaver supply units (IEC 61558-2-
5:1997)
Safety of power transformers, power supply units and similar -- Part 2-5: Particular
requirements for shaver transformers and shaver supply units
Sicherheit von Transformatoren, Netzgeräten und dergleichen -- Teil 2-5: Besondere
Anforderungen an Rasiersteckdosen-Transformatoren und Rasiersteckdosen-Einheiten
Sécurité des transformateurs, blocs d'alimentation et analogue -- Partie 2-5: Règles
particulières pour les transformateurs et les blocs d'alimentation pour rasoirs
Ta slovenski standard je istoveten z: EN 61558-2-5:1998
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
97.170 Oprema za nego telesa Body care equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
61558-2-5
INTERNATIONAL
Première édition
STANDARD
First edition
1997-12
PUBLICATION GROUPÉE DE SÉCURITÉ
GROUP SAFETY PUBLICATION
Sécurité des transformateurs,
blocs d’alimentation et analogues –
Partie 2-5:
Règles particulières pour les transformateurs
et les blocs d’alimentation pour rasoirs
Safety of power transformers,
power supply units and similar –
Part 2-5:
Particular requirements for shaver transformers
and shaver supply units
 IEC 1997 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
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Commission Electrotechnique Internationale
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International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61558-2-5  IEC:1997 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SAFETY OF POWER TRANSFORMERS,
POWER SUPPLY UNITS AND SIMILAR –
Part 2-5: Particular requirements for shaver transformers
and shaver supply units
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International standard IEC 61558-2-5 has been prepared by technical committee 96: Small
power transformers, reactors and power supply units and special transformers, reactors and
power supply units: Safety requirements.
It has the status of a group safety publication in accordance with IEC Guide 104: Guide for the
drafting of safety standards, and the role of committees with safety pilot functions and safety
group functions (1984).
The text of this standard is based on the following documents:
FDIS Report on voting
96/93/FDIS 96/103/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This part 2-5 is intended to be used in conjunction with IEC 61558-1. It was established on the
basis of the first edition (1997) of that standard.
This part 2-5 supplements or modifies the corresponding clauses in IEC 61558-1, so as to
convert that publication into the IEC standard: Particular requirements for shaver transformers
and shaver supply units.
61558-2-5  IEC:1997 – 5 –
When a particular subclause of part 1 is not mentioned in this part 2-5, that subclause applies
as far as is reasonable. Where this standard states "addition", "modification" or "replacement",
the relevant text of part 1 is to be adapted accordingly.
This standard replaces chapter II, section 1, of IEC 60742.
In this standard, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– explanatory matter: in smaller roman type.
In the text of the standard the words in bold are defined in clause 3.
Subclauses which are additional to those in part 1 are numbered starting from 101;
supplementary annexes are entitled AA, BB, etc.

61558-2-5  IEC:1997 – 7 –
SAFETY OF POWER TRANSFORMERS,
POWER SUPPLY UNITS AND SIMILAR –
Part 2-5: Particular requirements for shaver transformers
and shaver supply units
1 Scope
Replacement:
This part 2-5 of IEC 61558 applies to shaver supply units, embodying one or more socket-
outlets and a single phase air cooled isolating transformer, having a rated supply voltage
not exceeding 250 V a.c., a rated output not less than 20 VA and not excceding 50 VA, a
rated output voltage not exceeding 250 V, and a rated frequency not exceeding 500 Hz.
This standard is also applicable to shaver transformers for embodiment into shaver supply
units.
NOTE 1 – Shaver supply units may be flush or surface mounted or incorporated in luminaires and other
equipment.
NOTE 2 – Shaver supply units may be used to supply shavers, tooth brushes and similar small power devices.
2 Normative references
This clause of part 1 is applicable except as follows:
Addition:
IEC 60068-2-62: 1991, Environmental testing – Part 2: Test methods – Test Ef: Impact,
pendulum hammer
IEC 60670: 1989, General requirements for enclosures for accessories for household and
similar fixed electrical installations
3 Definitions
This clause of part 1 is applicable except as follows:
Addition:
3.1.101
shaver transformer
An isolating transformer for fixed installation and with limited output, designed to supply only
one shaver, or the like, at a time.
3.1.102
shaver supply unit
An accessory embodying a shaver transformer and one or more socket outlets allowing the
use of only one plug at a time.

61558-2-5  IEC:1997 – 9 –
4 General requirements
This clause of part 1 is applicable.
5 General notes on tests
This clause of part 1 is applicable.
6 Ratings
This clause of part 1 is applicable except as follows:
Addition:
6.101 The rated output voltage shall not exceed 250 V a.c.
Preferred values are in the range 220 V to 240 V and additionally 110 V to 130 V.
6.102 The rated output shall be not less than 20 VA and shall not exceed 50 VA.
6.103 The rated supply voltage shall not exceed 250 V a.c.
Compliance with the requirements of 6.101 to 6.103 is checked by inspection of the marking.
6.104 The rated frequency shall not exceed 500 Hz.
7 Classification
This clause of part 1 is applicable except as follows:
7.2 Modification:
According to short-circuit protection or protection against abnormal use:
– inherently short-circuit proof transformer;
– .
non-inherently short-circuit proof transformer
8 Marking and other information
This clause of part 1 is applicable except as follows:
8.1 Modification:
n) indication of the protection index IP, if higher than IP00: for shaver transformers;
indication of the protection index IP, if higher than IP21: for shaver supply units.

61558-2-5  IEC:1997 – 11 –
8.1 Addition:
Shaver supply units and shaver transformers shall be marked with the symbol according to
8.11 of this standard replacing the symbol for isolating transformers.
8.2 This subclause does not apply.
8.7 Addition:
For shaver supply units provided with a single-pole switch, the switched pole shall be
connected to the line.
8.11 Addition:
The following symbol shall be used:
for shaver supply units and shaver
transformers
(60417-IEC-5225)
8.13 Addition:
For shaver supply units, the marking for rated output voltage(s) and the symbol for shaver
supply units and shaver transformers shall be indicated on the front of the enclosure so as to
be visible when the unit is mounted as in normal use. For shaver supply units intended to
provide different output voltages, the selected output voltage setting shall be clearly
discernible.
For shaver transformers the symbol for shaver supply units and shaver transformers shall
be provided only if the transformer is supplied separately.
9 Protection against accessibility to hazardous live parts
This clause of part 1 is applicable.
10 Change of input voltage setting
This clause of part 1 is applicable.
11 Output voltage and output current under load
This clause of part 1 is applicable.
12 No-load output voltage
This clause of part 1 is applicable except as follows:

61558-2-5  IEC:1997 – 13 –
Addition:
12.101 The no-load output voltage shall not exceed 275 V.
12.102 The difference between the output voltage at no load measured in this clause and the
output voltage under load measured during the test of clause 11, expressed as a percentage of
the latter voltage, shall not exceed 20 %.
U – U
no-load load
NOTE – The ratio is defined as follows: × 100 %
U
load
Compliance with the requirements of 12.101 and 12.102 is checked by measuring the no-load
output voltage when the shaver transformer or shaver supply unit, at ambient temperature,
is connected to the rated supply voltage at rated frequency.
13 Short circuit voltage
This clause of part 1 is not applicable.
14 Heating
This clause of part 1 is applicable except as follows:
Addition:
14.2 Shaver supply units for flush-type mounting are mounted in an appropriate flush-type
mounting box as specified by the manufacturer, such a box being mounted in the support as
indicated in figure 1 of part 1.
15 Short-circuit and overload protection
This clause of part 1 is applicable.
16 Mechanical strength
This clause of part 1 is applicable except as follows:
16.1 Replacement:
For shaver supply units, compliance is checked by the test of 16.101.
Addition:
16.101 Shaver supply units are subjected to blows by means of a pendulum hammer,
defined as follows:
16.101.1 Blows are applied to the specimen according to IEC 60068-2-62.
For shaver supply units other than shaver supply units for flush-type mounting, the
specimen is mounted as described in 4.2 of IEC 60068-2-62.

61558-2-5  IEC:1997 – 15 –
For flush-type shaver supply units, the specimen is mounted as shown in figure 3 of
IEC 60068-2-62.
Flush-type equipment for screw fixing is fixed by means of screws to lugs recessed in the
mounting block; flush-type equipment for claw fixing is fixed directly to the block by means of
the claws.
The specimen is mounted as in normal use so that the point of impact lies in the vertical plane
through the axis of the pivot of the pendulum.
Before applying the blows, fixing screws of bases, covers and the like are tightened with a
torque equal to two thirds of that specified in table 11 of 25.1.
The striking element is allowed to fall from a height equal to that shown in table 101.
Table 101 – Values of heights of fall
Height of fall Approximate energy Relevant parts
cm J
0,2 Cover plates of
10 ± 0,1 shaver supply units
for flush-type mounting and for those
parts which are recessed to a depth
of at least one quarter of the largest
dimension of the recessed part
0,3 Enclosures
15 ± 0,1
0,5 Other parts
25 ± 0,1
16.101.2 The specimens are subjected to 10 blows which are evenly distributed over the
sample.
Five blows are applied as follows:
–for shaver supply units for flush-type mounting, one blow in the centre, one at each
extremity of the area over the recess in the block, and the other two approximately midway
between the previous blows, the specimen being moved horizontally;
– for other shaver supply units, one blow in the centre, one on each side of the specimen
after it has been turned as far as possible, but not through more than 60°, about a vertical
axis, and the other two approximately midway between the previous blows.
The remaining blows are then applied in the same way after the specimen has been turned
around through 90°, of its axis perpendicular
...