EN IEC 60947-5-8:2021

Low-voltage switchgear and controlgear - Part 5-8: Control circuit devices and switching elements - Three-position enabling switches

IEC 60947-5-8:2020 is available as IEC 60947-5-8:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60947-5-8:2020 specifies requirements for three-position enabling switches. These switches are used as components of enabling devices to provide signals that, - when activated, allow machine operation to be initiated by a separate start control, and - when de-activated, -- initiate a stop function, and -- prevent initiation of machine operation. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - due to the increasing range of useful applications of three-position enabling switches, note of scope, operational characteristics and tests are reviewed; - figures for example of devices incorporating enabling switch are added in Annex A; - new Annex B for procedure to determine reliability data for the switch used in functional safety applications is added.

Niederspannungsschaltgeräte - Teil 5-8: Steuergeräte und Schaltelemente - Drei-Stellungs-Zustimmschalter

Appareillage à basse tension - Partie 5-8: Appareils et éléments de commutation pour circuits de commande - Interrupteurs de commande de validation à trois positions

IEC 60947-5-8:2020 est disponible sous forme de IEC 60947-5-8:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60947-5-8:2020 spécifie les exigences pour les interrupteurs de commande de validation à trois positions. Ces interrupteurs sont utilisés comme composants dans les appareils de commande de validation pour fournir des signaux qui: - lorsqu’ils sont activés, permettent la mise en marche de la machine par une commande séparée de démarrage; et - lorsqu’ils sont désactivés: -- initient une fonction d’arrêt; et -- évitent la mise en marche de la machine. Cette deuxième édition annule et remplace la première édition parue en 2006. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - en raison du nombre croissant d’applications utiles possibles avec les interrupteurs de commande de validation à trois positions, le domaine d’application, les caractéristiques de fonctionnement et les essais sont revus; - des figures représentant des exemples d’appareils incorporant un interrupteur de commande de validation sont ajoutées dans l’Annexe A; - une nouvelle Annexe B est ajoutée, incluant une procédure visant à déterminer des données de fiabilité pour l’interrupteur utilisé dans des applications de sécurité fonctionnelle.

Nizkonapetostne stikalne naprave - 5-8. del: Krmilne naprave in stikalni elementi - Tripoložajna omogočilna stikala (IEC 60947-5-8:2020)

General Information

• Status: Published
• Publication Date: 01-Apr-2021
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: CLC/TC 121A - Low-voltage switchgear and controlgear
• Drafting Committee: IEC/SC 121A - Low-voltage switchgear and controlgear
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 02-Apr-2021
• Completion Date: 02-Apr-2021
• 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
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN IEC 60947-5-8:2021 - Low-voltage switchgear and controlgear - Part 5-8: Control circuit devices and switching elements - Three-position enabling switches (IEC 60947-5-8:2020)

Relations

• Replaces: EN 60947-5-8:2006 - Low-voltage switchgear and controlgear - Part 5-8: Control circuit devices and switching elements - Three-position enabling switches
• Effective Date: 13-Apr-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60947-5-8:2021
01-junij-2021
Nadomešča:
SIST EN 60947-5-8:2007
Nizkonapetostne stikalne naprave - 5-8. del: Krmilne naprave in stikalni elementi -
Tripoložajna omogočilna stikala (IEC 60947-5-8:2020)
Low-voltage switchgear and controlgear - Part 5-8: Control circuit devices and switching
elements - Three-position enabling switches (IEC 60947-5-8:2020)
Niederspannungsschaltgeräte - Teil 5-8: Steuergeräte und Schaltelemente - Drei-
Stellungs-Zustimmschalter (IEC 60947-5-8:2020)
Appareillage à basse tension - Partie 5-8: Appareils et éléments de commutation pour
circuit de commande - Interrupteurs de commande de validation à trois positions (IEC
60947-5-8:2020)
Ta slovenski standard je istoveten z: EN IEC 60947-5-8:2021
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
SIST EN IEC 60947-5-8:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60947-5-8:2021

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SIST EN IEC 60947-5-8:2021


EUROPEAN STANDARD EN IEC 60947-5-8

NORME EUROPÉENNE

EUROPÄISCHE NORM
April 2021
ICS 29.130.20 Supersedes EN 60947-5-8:2006 and all of its
amendments and corrigenda (if any)
English Version
Low-voltage switchgear and controlgear - Part 5-8: Control
circuit devices and switching elements - Three-position enabling
switches
(IEC 60947-5-8:2020)
Appareillage à basse tension - Partie 5-8: Appareils et Niederspannungsschaltgeräte - Teil 5-8: Steuergeräte und
éléments de commutation pour circuits de commande - Schaltelemente - Drei-Stellungs-Zustimmschalter
Interrupteurs de commande de validation à trois positions (IEC 60947-5-8:2020)
(IEC 60947-5-8:2020)
This European Standard was approved by CENELEC on 2020-09-16. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60947-5-8:2021 E

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SIST EN IEC 60947-5-8:2021
EN IEC 60947-5-8:2021 (E)
European foreword
The text of document 121A/358/FDIS, future edition 2 of IEC 60947-5-8, prepared by SC 121A "Low-
voltage switchgear and controlgear" of IEC/TC 121 "Switchgear and controlgear and their assemblies
for low voltage" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60947-5-8:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-10-02
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-04-02
document have to be withdrawn
This document supersedes EN 60947-5-8:2006 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC 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.
Endorsement notice
The text of the International Standard IEC 60947-5-8:2020 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have
...