EN 61009-1:2012

Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules

IEC 61009-1:2010 applies to residual current operated circuit breakers with integral overcurrent protection functionally independent of, or functionally dependent on, line voltage for household and similar uses (hereafter referred to as RCBOs), for rated voltages not exceeding 440 V a.c. with rated frequencies of 50 Hz, 60 Hz or 50/60 Hz and rated currents not exceeding 125 A and rated short circuit capacities not exceeding 25 000 A for operation at 50 Hz or 60 Hz. This third edition cancels and replaces the second edition, published in 1996, amendment 1 (2002) and amendment 2 (2006). It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - complete revision of EMC sequences, including the new test T.2.6, already approved in IEC 61543; - clarification of RCDs current/time characteristics reported in Tables 2 and 3; - revision of test procedure for IΔn between 5 A and 200 A; - tests for the use of RCBOs in IT systems; - testing procedure regarding the 6mA d.c. current superimposed to the fault current; - improvement highlighting RCDs with multiple sensitivity; - some alignments with IEC 60898-1.

Fehlerstrom-/Differenzstrom-Schutzschalter mit eingebautem Überstromschutz (RCBOs) für Hausinstallationen und für ähnliche Anwendungen - Teil 1: Allgemeine Anforderungen

Interrupteurs automatiques à courant différentiel résiduel avec dispositif de protection contre les surintensités incorporé pour usages domestiques et analogues (DD) - Partie 1: Règles générales

La CEI 61009-1:2010 s'applique aux interrupteurs automatiques avec protection contre les surintensités incorporé, à courant différentiel résiduel, fonctionnellement indépendants ou fonctionnellement dépendants de la tension d'alimentation, pour installations domestiques et analogues (en abrégé 'DD' dans la suite du texte), ayant une tension assignée ne dépassant pas 440 V alternatifs, avec des fréquences assignées de 50 Hz, 60 Hz ou 50/60 Hz et un courant assigné ne dépassant pas 125 A et un pouvoir de coupure ne dépassant pas 25 000 A pour fonctionnement à 50 Hz ou 60 Hz. Cette troisième édition annule et remplace la deuxième édition, publiée en 1996, ainsi que l'amendement 1 (2002) et l'amendement 2 (2006), dont elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - révision complète des séquences CEM, incluant le nouvel essai T.2.6, déjà approuvé dans la CEI 61543; - clarification des caractéristiques courant/temps des DDR incluses dans les Tableaux 2 et 3; - révision de la procédure d'essai pour IΔn entre 5 A et 200 A; - essais pour l'emploi des DD dans les systèmes IT; - procédure d'essai concernant le courant continu 6 mA superposé au courant de défaut; - des améliorations mettant en relief les DDR avec sensibilité multiple; - des alignements avec la CEI 60898-1.

Odklopniki na preostali (residualni) tok z vgrajeno nadtokovno zaščito za gospodinjsko in podobno rabo (RCBO's) - 1. del: Splošna pravila (IEC 61009-1:2010, spremenjen)

Ta mednarodni standard se uporablja za odklopnike na preostali (residualni) tok z vgrajeno nadtokovno zaščito, ki so funkcionalno neodvisni ali odvisni od linijske napetosti, za gospodinjsko in podobno rabo (v nadaljnjem besedilu: RCBO), za nazivne napetosti do vključno 440 V izmenične napetosti, pri čemer nazivna frekvenca dosega 50 Hz, 60 Hz ali 50/60 Hz, nazivni tok ne presega 125 A, nazivne kratkostične zmogljivosti pa ne presegajo 25000 A med delovanjem pri 50 Hz ali 60 Hz. Te naprave so namenjene zaščiti oseb pred posrednim stikom, pri čemer so izpostavljeni prevodni deli inštalacije povezani z ustreznim ozemljilom, in zaščiti napeljav stavb in podobnih aplikacij pred nadtoki. Uporabljajo se lahko za zaščito pred požarom zaradi stalnega ozemljitvenega okvarnega toka brez naprave za nadtokovno zaščito. Tudi odklopniki na preostali (residualni) tok z vgrajeno nadtokovno zaščito (RCBO) z nazivnim preostalim operativnim tokom do vključno 30 mA se uporabljajo kot dodatna zaščita v primeru odpovedi zaščitnega sredstva pred električnim udarom. Ta standard se uporablja za naprave, ki hkrati izvajajo funkcije zaznavanja preostalega (residualnega) toka, primerjanja vrednosti tega toka s preostalo operativno vrednostjo in odprtja zaščitenega tokokroga, kadar preostali tok presega to vrednost, ter tudi funkcijo ustvarjanja, prenosa in prekinitve nadtokov pod določenimi pogoji. Odklopniki RCBO splošnega tipa se ne morejo po nesreči odklopiti, tudi kadar previsoka napetost (zaradi prehodnih preklapljanj ali udara strele) povzroči obremenilne tokove v inštalaciji brez nastanka preboja. Odklopniki RCBO tipa S naj bi v zadostni meri ščitili pred neželenim odklopom, celo kadar previsoka napetost povzroči preboj in nastane nadaljnji tok. Odklopniki RCBO so primerni za izolacijo. Odklopniki RCBO, ki so skladni s tem standardom, razen odklopnikov z neprekinjeno nevtralno točko, so primerni za uporabo v sistemih IT. Posebni zaščitni ukrepi (npr. prenapetostni odvodniki) so lahko potrebni, kadar lahko na strani dobave nastane prekomerna prenapetost (na primer v primeru dobave prek nadzemnih vodov) (glejte standard 60364-4-44). Ta standard se uporablja tudi za odklopnike RCBO, ki se pridobijo z montažo naprave s prilagodljivim preostalim (residualnim) tokom z odklopnikom. Mehansko montažo izvede proizvajalec v tovarni ali se opravi na kraju samem, v tem primeru pa se uporabljajo zahteve Dodatka G. Uporablja se tudi za odklopnike RCBO z več kot enim nazivnim tokom, če sredstvo za spreminjanje nazivnega toka ni na voljo med običajnim delovanjem in se nazivni tok ne more spremeniti brez uporabe orodja. Dodatne zahteve so lahko potrebne za vtične odklopnike RCBO. Posebne zahteve so potrebne za odklopnike RCBO, vgrajene v ali namenjene le uporabi z vtiči in vtičnicami ali s spojkami naprave za gospodinjsko in podobno splošno rabo in če so namenjeni uporabi pri frekvencah, ki niso 50 Hz ali 60 Hz. Ta standard se ne uporablja za: – odklopnike RCBO, namenjene zaščiti motorjev; – odklopnike RCBO, katerih trenutno nastavitev je mogoče prilagoditi s sredstvi, ki so uporabniku na voljo med običajnim delovanjem. Zahteve tega standarda se uporabljajo za običajne okoljske pogoje. Dodatne zahteve so lahko potrebne za odklopnike RCBO, ki se uporabljajo na lokacijah z neugodnimi okoljskimi pogoji. Ta standard ne zajema odklopnikov RCBO z akumulatorji. V Dodatku F so zajeta navodila za usklajevanje odklopnikov RCBO z varovalkami.

General Information

• Status: Published
• Publication Date: 13-Dec-2012
• Withdrawal Date: 17-Jun-2017
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: CLC/TC 23E - Circuit breakers and similar devices for household and similar applications
• Drafting Committee: IEC/SC 23E - IEC_SC_23E
• Parallel Committee: IEC/SC 23E - IEC_SC_23E
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 14-Dec-2012
• Completion Date: 14-Dec-2012
• Directive: 2004/108/EC - Directive 2004/108/EC of the European Parliament and of the Council of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and repealing Directive 89/336/EEC
• Directive: 2004/108/EU - DIRECTIVE 2004/108/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and repealing Directive 89/336/EEC
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Ref Project: SIST EN 61009-1:2013 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules (IEC 61009-1:2010, modified)

Relations

• Replaces: EN 61009-1:2004/A12:2009 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO's) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Replaces: EN 61009-1:2004/A14:2012 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO's) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Replaces: EN 61009-1:2004 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO's) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Replaces: EN 61009-1:2004/A14:2012/AC:2012 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO's) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Replaces: EN 61009-1:2004/A13:2009 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO's) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Replaces: EN 61009-1:2004/A11:2008 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO's) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Amended By: EN 61009-1:2012/A1:2014 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Amended By: EN 61009-1:2012/A2:2014 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules
• Effective Date: 28-Jan-2023
• Amended By: EN 61009-1:2012/A13:2021 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules
• Effective Date: 23-Jan-2023
• Amended By: EN 61009-1:2012/A11:2015 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules
• Effective Date: 23-Jan-2023
• Amended By: EN 61009-1:2012/A12:2016 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2013
1DGRPHãþD
SIST EN 61009-1:2005
SIST EN 61009-1:2005/A11:2008
SIST EN 61009-1:2005/A12:2009
SIST EN 61009-1:2005/A13:2009
SIST EN 61009-1:2005/A14:2012
SIST EN 61009-1:2005/A14:2012/AC:2013
2GNORSQLNLQDSUHRVWDOLUHVLGXDOQLWRN]YJUDMHQRQDGWRNRYQR]DãþLWR]D
JRVSRGLQMVNRLQSRGREQRUDER5&%2
VGHO6SORãQDSUDYLOD,(&
VSUHPHQMHQ
Residual current operated circuit-breakers with integral overcurrent protection for
household and similar uses (RCBOs) - Part 1: General rules (IEC 61009-1:2010,
modified)
Fehlerstrom-/Differenzstrom-Schutzschalter mit eingebautem Überstromschutz (RCBOs)
für Hausinstallationen und für ähnliche Anwendungen -- Teil 1: Allgemeine
Anforderungen (IEC 61009-1:2010, modifiziert)
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de protection
contre les surintensités incorporé pour usages domestiques et analogues (DD) - Partie 1:
Règles générales( CEI 61009-1:2010, modifiée)
Ta slovenski standard je istoveten z: EN 61009-1:2012
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61009-1
NORME EUROPÉENNE
December 2012
EUROPÄISCHE NORM
ICS 29.120.50 Supersedes EN 61009-1:2004 + corr. Jul.2006 + A11:2008 + A12:2009 + A13:2009
+ A14:2012 + AC:2012
English version
Residual current operated circuit-breakers with integral overcurrent
protection for household and similar uses (RCBOs) -
Part 1: General rules
(IEC 61009-1:2010, modified)
Interrupteurs automatiques à courant Fehlerstrom-/Differenzstrom-
différentiel résiduel avec dispositif de Schutzschalter mit eingebautem
protection contre les surintensités Überstromschutz (RCBOs) für
incorporé pour usages domestiques et Hausinstallationen und für ähnliche
analogues (DD) - Anwendungen -
Partie 1: Règles générales Teil 1: Allgemeine Anforderungen
(CEI 61009-1:2010, modifiée) (IEC 61009-1:2010, modifiziert)

This European Standard was approved by CENELEC on 2012-06-18. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.

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

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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61009-1:2012 E
Foreword
This document (EN 61009-1:2012) consists of the text of IEC 61009-1:2010 prepared by IEC/TC 23E
"Circuit-breakers and similar equipment for household use", together with the common modifications
prepared by CLC/TC 23E "Circuit breakers and similar devices for household and similar applications".

The following dates are fixed:

(dop) 2013-06-18
• latest date by which this document has to be
implemented
at national level by publication of an identical
national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2017-06-18
with this document have to be withdrawn

This document supersedes EN 61009-1:2004 + corr.Jul.2006 + A11:2008 + A12:2009 + A13:2009 +
A14:2012 + AC:2012.
– complete revision of EMC sequences, including the new test T.2.6, already approved in EN 61543;
– clarification of RCDs current/time characteristics reported in Tables 2 and 3;
– revision of test procedure for I between 5 A and 200 A;
Δn
– tests for the use of RCBOs in IT systems;
– testing procedure regarding the 6mA d.c. current superimposed to the fault current;
– improvement highlighting RCDs with multiple sensitivity;
– some alignments with EN 60898-1.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
This document has been prepared under a mandate given to CENELEC by the European Commission and
the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
document.
Clauses, subclauses, notes, tables, figures and annexes which are additional to those in IEC 61009-1:2010
are prefixed “Z”.
Endorsement notice
The text of the International Standard IEC 61009-1:2010 was approved by CENELEC as a European
Standard with agreed common modifications.

- 3 - EN 61009-1:2012
COMMON MODIFICATIONS
Clause Common modification
1 Add in the first paragraph “for fixed installations” after “125 A”.

Delete in the first paragraph “with rated frequencies of 50 Hz, 60 Hz or 50/60 Hz” and “for
operation at 50 Hz or 60 Hz”
Add after ”They are intended for use in an environment with pollution degree 2”, “and
overvoltage category III”.
Delete in the second paragraph after note 6: “, with the exception of those with an
uninterrupted neutral,”
Delete after note 7 “It also applies to RCBOs having more than one rated current, provided
that the means for changing from one discrete rating to another is not accessible in normal
service and that the rating cannot be changed without the use of a tool.“

Modify the third paragraph after note 7 by “Particular requirements are necessary for RCBOs
:
- integrated in one unit with a socket-outlet or designed exclusively for being associated
locally with a socket-outlet in the same mounting box
- if intended to be used at frequencies other than 50 Hz or 60 Hz“

Replace Note 8 by the following sentence in the core text of the scope: “ For RCBOs
incorporated in, or intended only for association with socket-outlets, the requirements of this
standard may be used in conjunction with the requirements of IEC 60884-1 or national
requirements of the country where the product is placed on the market”.

Delete notes 9 and 10.
2 Replace the text of Clause 2 by:
NOTE Normative references to international publications are listed in Annex ZA (normative).
3.3.16 Modify by “void”
3.3.17 Replace "current paths" by "poles".
3.3.Z.1 Add the following new definition:
3.3.Z1
plug-in RCBO
RCBO having one or more plug-in terminals (see 3.6.Z1) and designed for use with
appropriate means for the plug-in connection
3.4.19.1 Modify twice “current paths” by “poles”
3.6.Z1 Add the following new definition:
3.6.Z1
plug-in terminal
terminal the electrical connection and disconnection of which can be effected without
displacing the conductors of the corresponding circuit. The connection is effected without the
use of a tool and is provided by the resilience of the fixed and/or moving parts and/or by
springs
4 Delete the number “12” in the first paragraph.
4.1 Replace the note by the following specification:
The selection of the various types is made according to HD 60364 and non-conflicting
national wiring rules. Table Z1 lists the types of RCBOs according to the various applications
but does not exclude the use of RCBOs of any classification for protection over and above
that required by the relevant wiring rules.

Clause Common modification
4.1 Add the following table at the end :
Table Z1 – Survey of the types of RCBOs according to their method of operation
Classification 4.1.1 4.1.2.2a) 4.1.2.1 b) 4.1.2.2b)
Marking of use Without E1 E2 E3
Protection Indirect Indirect Additional Additional
a a b
contact and contact and protection protection
additional additional
a a
protection protection
Service Yes Yes No Yes
c
continuity
a
Additional protection, provided only by RCBOs with I ≤ 0,03 A.
∆n
b
Only devices integrated in one unit with a socket-outlet or designed exclusively for
being associated locally with a socket outlet in a same mounting box.
c
This information is given for guidance only.

4.1.2.1 Replace a) by “a) deleted”

4.1.2.2 a) Replace the final sentence in brackets by "(additional requirements are under consideration)".
4.1.2.2 Delete the note.
b)
4.2 Replace the text by "Deleted".
4.3 Delete:
– single-pole RCBO with one overcurrent protected pole and uninterrupted neutral (see
3.3.16) (two current paths)
– three-pole RCBO with three overcurrent protected poles and uninterrupted neutral (four
current paths).
4.4 Replace the text by 'Deleted'
4.10
Replace the existing subclause title and text by the following new subclause:
4.10 According to the methods of connection
4.10.1 According to the fixation system:
- RCBO’s, the electrical connections of which are not associated with the mechanical
mounting;
- RCBO’s, the electrical connections of which are associated with the mechanical
mounting.
NOTE Examples of this type are:
– plug-in type;
– bolt-on type;
– screw-in type.
Some RCBO’s may be of the plug-in type or bolt-on type on the line side only, the load
terminals being usually suitable for wiring connection.
4.10.2 According to the type of terminals:
– RCBO’s with screw-type terminals for external copper conductors;
– RCBO’s with screwless type terminals for external copper conductors;
NOTE 1 The requirements for RCBO’s equipped with this type of terminals are given in Annex ZE.
– RCBO’s with flat quick-connect terminals for external copper conductors;
NOTE 2 The requirements for RCBO’s equipped with this type of terminals are given in Annex ZF.

- 5 - EN 61009-1:2012
Clause Common modification
4.12 Replace the text by:
RCBOs of B-type and C-type, having rated current up to and including 63 A and having short-
circuit breaking capacity of 3 000 A, 4 500 A, 6 000 A and 10 000 A, shall be classified
according to the limits within which their I²t characteristics lie, measured according to 9.12.6
(see Annex ZD).
Other ratings and D-type RCBOs cannot be classified according to this Annex ZD.
4.Z.1
Add the following new subclause:
4.Z1 According to the range of ambient air temperature
– RCBOs for use at ambient air temperatures between -5 °C and +40 °C;
– RCBOs for use at ambient air temperatures between -25 °C and +40 °C.
5.1 Delete the first dashed item.
5.1 Add the following item to the list of common characteristics:
– ranges of ambient air temperature (see 5.3.Z1)
5.2.1.3
Replace “Table 5” by 5.3.10
5.2.3
Delete second and third paragraphs of 5.2.3.
5.2.7
Add a note :
NOTE  the corresponding rated quantity of circuit-breaker is the rated making and breaking capacity of
an individual pole Icn1 (see 5.2.5 of EN 60898-1:2002).
Replace the last line by:
The conditions are those specified in 9.12.11.4d)
5.3.1 Replace "preferred" by "standard" (twice).
5.3.1
Replace the table by the following:
Rated voltage of RCB0s for use in systems
RCBO
230 V, 230 V/400 V, 400V
230 V
Two-pole
400 V
Three-pole 400 V
Four-pole 400 V
Delete the note.
5.3.2 Delete in the second line the value 8 A.
5.3.3 Delete the value “0,006”.
Delete the note.
5.3.3 Add 1A to the standard values.
5.3.5 Replace the title by "Value of rated frequency".
Replace the text by:
The preferred value of rated frequency is 50 Hz.
5.3.6 Replace the subclause title by:
5.3.6 Values of rated short-circuit capacity (I ) and of rated residual making and breaking
cn
capacity (I )
∆m
5.3.6.1 Replace the first sentence by:
Standard values of rated short-circuit capacity and of rated residual making and breaking
capacity are given in Table 1. The values of I and I may be different on the same product.
cn ∆m
5.3.6.1 Replace Table 1 and the subsequent footnote by:

5.3.7 Delete 5.3.7 and replace by “Void”

Clause Common modification
5.3.8.1 In Table 2 Modify “Minimum non operating times” by” Minimum non-actuating times“
Delete the note.
5.3.9
a
Delete “a)” and “ For special cases values up to 50 I may also be used.”
n
5.3.10
Change contents of 5.3.10 to
Standard value of the rated impulse voltage (U ) is 4 kV.
imp
NOTE 1 For test voltages to check the insulation see 9.20.
NOTE 2 For test voltages to check the isolation distance across open contacts see Table 18.
5.3.Z1 Add the following new subclause:
5.3.Z1 Standard ranges of ambient air temperature
The standard ranges of ambient air temperature are:
– -5 °C to +40 °C
– -25 °C to +40 °C
6.Z.1
Replace the whole subclause by:
6.Z1 Standard marking
Each RCBO shall be marked in a durable manner according to the following Table Z3.
For RCBOs other than those operated by means of push-button, the open position shall
be indicated by the symbol "Ο" and the closed position by the symbol "|" (a short straight
line).
Additional national symbols are allowed for this indication. Provisionally the use of national
indications only is allowed. These indications shall be readily visible when the RCBO is
installed.
For RCBOs operated by means of two push-buttons, the push-button designed for the opening
operation only shall be RED and/or be marked with the symbol "O".
RED shall not be used for any other push-button of the RCBO.
If a push-button is used for closing the contacts and is evidently identified as
...