EN IEC 60947-5-8:2021

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

Publication date:   Aug 16, 2021

General information

60.60 Standard published   Apr 2, 2021

CENELEC

CLC/TC 121A Low-voltage switchgear and controlgear

European Norm

29.130.20   Low voltage switchgear and controlgear

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Scope

<!-- NEW! -->IEC 60947-5-8:2020 is available as <a href="https://webstore.iec.ch/publication/67455">IEC 60947-5-8:2020 RLV</a> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.</br></br>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.

Related legislation

Legislation related to this standard

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

Harmonized/Supporting

Life cycle

PREVIOUSLY

WITHDRAWN
EN 60947-5-8:2006

NOW

PUBLISHED
EN IEC 60947-5-8:2021
60.60 Standard published
Apr 2, 2021