IEC 60947-1:2020 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:
- definitions,
- characteristics,
- 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 sixth edition cancels and replaces the fifth edition published in 2007, Amendment 1:2010 and Amendment 2:2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
– DC values testing improvement,
– update of EMC tests,
– Annex B deletion,
– update of requirements for environmental tests (Table Q.1),
– improvement of Annex R (new examples),
– deletion of digital input Type 2, and introduction of Type 3 in Annex S,
– example for materials declaration (Annex W),
– new Annex X (co-ordination between short-circuit protective devices associated in the same circuit) created.