Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
< !-- NEW! --> IEC 60947-4-1:2018 is available as < a href=" https:/ / webstore.iec.ch/ publication/ 64066" > IEC 60947-4-1:2018 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 60947-4-1:2018 is applicable to the following equipment:- electromechanical contactors and starters including motor protective switching device (MPSD) - actuators of contactor relays - contacts dedicated exclusively to the coil circuit of this contactor or this contactor relay - dedicated accessories (e.g. dedicated wiring, dedicated latch accessory) intended to be connected to distribution circuits, motors circuits and other load circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC. This fourth edition cancels and replaces the third edition published in 2009 and its Amendment 1:2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:- Scope structure and exclusions- Editorial correction of notes and hanging paragraphs- Reference to IEC 62683-1- Motor protective switching device (MPSD) with its requirements- Safety aspects related to:- General aspects - Limited energy circuits - Electronic circuits - Assessment procedure for electromechanical overload protection used in safety -applications (new Annex L)- Introduction of provisions covering the impact of higher locked rotor current to achieve high efficiency class- Mention of dedicated wiring accessories- Pickup power measurement- Alignment to IEC 60947-1:2007, IEC 60947-1:2007/ AMD1:2010, and IEC 60947‑1:2007/ AMD2:2014- Direct current requirements for covering photovoltaic application (new Annex M)- Load monitoring indicators (new Annex O)- Short-circuit breaking tests of MPSD (new Annex P)- Co-ordination under short-circuit conditions between a MPSD and another short-circuit protective device associated in the same circuit (new Annex Q).
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