IEC 60947-4-1:2018 RLV


Note: Latest version: IEC 60947-4-1:2023 ED5

Existing or new amendments and versions must be purchased separately.



IEC 60947-4-1:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. 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). The contents of the interpretation sheet of March 2020, the corrigendum 1 of April 2020 and the corrigendum 2 of April 2021 have been included in this copy.

Products specifications

  • Redline from IEC
  • Published:
  • Withdrawn:
  • Edition: 4
  • Document type: IS
  • Pages
  • Publisher: IEC
  • Distributor: IEC
  • ICS: 29.130.20
  • ICS: 29.120.99
  • International TC: TC 121/SC 121A

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