IEC 60947-1-2020 Low-voltage switchgear and controlgear – Part 1: General rules.
This document applies, when required by the relevant product standard, to low-voltage switchgear and controlgear hereinafter referred to as “equipment” or “device” and intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC or
1 500 V DC.
This document states the general rules and common safety requirements for low-voltage switchgear and controlgear, including:
− information supplied with the equipment;
− normal service, mounting and transport conditions, decommissioning and dismantling;
− constructional and performance requirements;
− verification of characteristics and performance;
− energy efficiency aspects (see Annex V);
− environmental aspects.
This document does not apply to:
− low-voltage switchgear and controlgear assemblies which are dealt with in IEC 61 439 series, as applicable;
− terminals for connection of aluminium conductors;
NOTE Terminals for aluminium conductors are under consideration for the next revision.
− use within explosive atmospheres (see IEC 60079 series);
− software and firmware requirements for functional safety application (see IEC 61 508-3);
− cyber security aspects (see IEC 62443 series).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60038:2009, IEC standard voltages
IEC 60068-1 :201 3, Environmental testing − Part 1: General and guidance
IEC 60068-2-1 :2007, Environmental testing − Part 2-1: Tests − Test A: Cold
IEC 60068-2-2:2007, Environmental testing − Part 2-2: Tests − Test B: Dry heat
IEC 60068-2-6:2007, Environmental testing − Part 2-6: Tests − Test Fc: Vibration (sinusoidal)
3 Terms, definitions, symbols and reference clauses
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp.IEC 60947-1 pdf download.