EN IEC 60947-4-2:2023
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Low-voltage switchgear and controlgear - Part 4-2: Contactors and motor-starters - Semiconductor motor controllers, starters and soft-starters
03-03-2023
IEC 60947-4-2:2020 applies to semiconductor motor controllers, starters and soft-starters which can include a series mechanical switching device, intended to be connected to circuits the rated voltage of which does not exceed 1 000 V AC.This fourth edition cancels and replaces the third edition published in 2011. This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:- scope exclusions;- editorial correction of notes and hanging paragraphs;- reference to IEC 62683-1;- safety aspects related to:- general aspects;- limited energy circuits;- electronic circuits;- mention of dedicated wiring accessories;- power consumption measurement;- alignment to IEC 60947-1:2020.
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