EN 50428:2005

SLOVENSKI SIST EN 50428:2006
STANDARD
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(istoveten EN 50428:2005)
Switches for household and similar fixed electrical installations – Collateral standard
– Switches and related accessories for use in home and building electronic systems
(HBES)
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29.120.40; 97.120
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EUROPEAN STANDARD EN 50428
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2005
ICS 29.120.40; 97.120
English version
Switches for household and similar fixed electrical installations –
Collateral standard –
Switches and related accessories for use
in home and building electronic systems (HBES)

Interrupteurs pour installations électriques Schalter für Haushalt und ähnliche
fixes domestiques et analogues – ortsfeste elektrische Installationen –
Norme collatérale – Ergänzungsnorm –
Interrupteurs et appareils associés Schalter und ähnliches Installations-
pour usage dans les systèmes material in elektronischer Systemtechnik
électroniques des foyers domestiques für Heim und Gebäude (ESHG)
et bâtiments (HBES)
This European Standard was approved by CENELEC on 2004-12-07. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50428:2005 E
Foreword
This European Standard has been prepared by the Technical Committee CENELEC TC 23B:
Switches for household and similar fixed electrical installations.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as EN 50428 on 2004-12-07.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-01-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 89/336/EEC. See Annex ZZ.
This standard has to be used in conjunction with EN 60669-1 and EN 60669-2-1. It lists the
additional changes necessary to convert it into the European Standard: Switches for household and
similar fixed electrical installations - Collateral standard - Switches and related accessories for use
in home and building electronic systems (HBES)
When this standard states "addition", "modification" or "replacement", the relevant text of
EN 60669-1 or EN 60669-2-1 (hereinafter called Part 1 and Part 2-1 respectively) is to be adapted
accordingly.
NOTE  The following numbering system is used:
- subclauses, tables and figures that are numbered starting from 201 are additional to those in Part 2-1;
- additional annexes to Part 1 are lettered AA, BB, etc.
__________
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Contents
1 Scope .6
2 Normative references .6
3 Definitions .7
4 General requirements.8
5 General notes on tests .8
6 Ratings .8
7 Classification .9
8 Marking.9
9 Checking of dimensions.9
10 Protection against electric shock .9
11 Provision for earthing .10
12 Terminals .10
13 Constructional requirements .10
14 Mechanism.10
15 Resistance to ageing, protection provided by enclosures of switches, and resistance to
humidity .10
16 Insulation resistance and electric strength .11
17 Temperature rise.11
18 Making and breaking capacity .11
19 Normal operation .11
20 Mechanical strength .11
21 Resistance to heat .11
22 Screws, current-carrying parts and connections .11
23 Creepage distances, clearances and distances through sealing compound .11
24 Resistance of insulating material to abnormal heat, to fire and to tracking .16
25 Resistance to rusting.16
26 EMC requirements .16
101 Abnormal conditions.21
102 Components.21

Annex A (normative) Survey of specimens needed for tests.22
Annex B (normative) Additional requirements for switches having facilities for the
outlet and retention of flexible cables .22
Annex AA (normative) Examples of types of electronic switches and their functions .22
Annex BB (normative) Measurement of clearances and creepage distances .23
Annex CC (normative) Test set-ups for HBES switches using TP-Media and PL-Media.26
Annex DD (informative) A-deviations .38
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives.39

Figure 201 – Protective separation between circuits .14
Figure BB.1 – Narrow groove .25
Figure BB.2 – Wide groove .25
Figure BB.3 – V-shaped groove .25
Figure BB.4 – Rib.26
Figure BB.5 – Uncemented joint with narrow groove.26
Figure BB.6 – Uncemented joint with wide groove .26
Figure BB.7 – Uncemented joint with narrow and wide grooves.26
Figure BB.8 – Intervening, unconnected conductive part .27
Figure BB.9 – Narrow recess .27
Figure BB.10 – Wide recess.27
Figure CC.1 – Test at the mains connections of bus devices .28
Figure CC.2 – Test at the Medium Interface of bus devices .29
Figure CC.3 – Test at the Universal Interface, Process Interface and Input/Output
connections of bus devices.29
Figure CC.4 – Test at the mains connections of HBES devices .30
Figure CC.5 – Test at the Medium Interface of HBES devices .30
Figure CC.6 – Test at the UI, PI, I/O connections of HBES devices.31
Figure CC.7 – Electrostatic discharge .32
Figure CC.8 – Test in the anechoic chamber .32
Figure CC.9 – Top view.33
Figure CC.10 – Side view 1.33
Figure CC.11 – Side view 2.33
Figure CC.12 – Test arrangement for EN 61000-4-6 test.34
Figure CC.13 – Example of a test arrangement in the anechoic chamber.35
Figure CC.14 – Side view 1 (example).35
Figure CC.15 – Test arrangement for radio emission interference voltage
on the bus cable.36
Figure CC.16 – Test arrangement for radio emission interference voltage at the mains terminal.37
Figure CC.17 – Test arrangement for common mode noise current test on the bus cable .37
Figure CC.18 – Test arrangement for voltage dips and variations for the mains
connections of a HBES switch.38

Table 11 – Forces to be applied to covers, cover-plates or actuating members whose
fixing is not dependent on screws.11
Table 14 – Test voltage, points of application and minimum values of insulating
resistance for the verification of dielectric strength .11
Table 201 – Relation between the rated voltage of the HBES switch, the rated insulation voltage
and the rated impulse voltage .12
Table 202 – Minimum clearances without verification test.15
Table 203 – Test voltages and corresponding altitudes .16
Table 204 – Minimum clearances with verification test.16
Table 205 – Minimum creepage distances of basic, supplementary and reinforced insulation.17
Table 206 – Minimum creepage distances of basic, supplementary and reinforced insulation.17
Table 207 – Immunity tests (overview) .19

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Table 208 – Voltage dip and short-interruption test values.20
Table 209 – Surge immunity test voltages.20
Table 210 – Fast transient test values.21
Table CC.1 – Limits of conducted common mode disturbances for control, signal an
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