IEC 60947-6-2:2020 ED3


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IEC 60947-6-2:2020 This document applies to control and protective switching devices (or equipment) (CPS), the main contacts of which are intended to be connected to circuits of rated voltage not exceeding 1 000 V AC or 1 500 V DC. It covers control and protective switching device (CPS): which provides protective and control functions for circuits and motors; where its control function is operated exclusively otherwise than by hand; which provides continuity of service after over-current conditions; and which can have additional functions, such as isolation or communication. This third edition cancels and replaces the second edition published in 2002 and its Amendment 1:2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: editorial changes according to ISO/IEC directives Part 2, alignments with IEC 60947-1:2020: markings ("s", "sol", "r" or "f"); constructional requirements including material requirements; requirements for screwless terminals; measurement method of the pole impedance; EMC requirement and testing; procedure to determine data for electromechanical CPS’s used in functional safety applications; harmonisation with IEC 60947-2:2016: operation tests of under-voltage relays and shunt releases; CPS for IT systems (Annex G); coordination with other short-circuit protective devices; alignments with IEC 60947-4-1:2018: test at the rated conditional short-circuit current Iq of protected switching devices; short-circuit tests harmonisation with North America; reliability data for functional safety applications (new Annex K); safety aspects related to electronic circuits and protective impedance (new Annex N); introduction of provisions covering the impact of higher locked rotor current to achieve high efficiency class; mention of dedicated wiring accessories; definitions and measurement method of the power consumption of the control circuit during holding and pick-up operations; load monitoring indicators (new Annex M). The contents of the corrigendum of December 2021 have been included in this copy.

Products specifications

  • Standard from IEC
  • Published:
  • Edition: 3
  • Document type: IS
  • Pages
  • Publisher: IEC
  • Distributor: IEC
  • ICS: 29.120.40
  • ICS: 29.130.20
  • International TC: TC 121/SC 121A

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