IEC 60947-6-2:2020 

Low-voltage switchgear and controlgear - Part 6-2: Multiple function equipment - Control and protective switching devices (or equipment) (CPS)


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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.

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Additional information

Publication typeInternational Standard
Publication date2020-12-15
Available language(s)English/French
TC/SCTC 121/SC 121A - Low-voltage switchgear and controlgearrss
ICS29.120.40 - Switches
29.130.20 - Low voltage switchgear and controlgear
Stability date  2024
File size3931 KB

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