SC 121A

Low-voltage switchgear and controlgear

 

Detail

Committee
Working Groups
Project Leader

Current

Status

Frcst Pub

Date

Stability

Date

SC 121AWG 2Mr Philippe JUHELPPUB2020-122024

History

Stage
Document
Downloads
Decision Date
Target Date
ACD
121A/173/RR PDF file 26 kB
2017-10-10 
CD
121A/190/CD
PDF file 694 kB
2017-12-012017-10
PCC
2018-02-232018-02
ACDV
121A/251/CC PDF file 213 kB
Word file 75 kB
2018-10-122018-12
ACDV
121A/251A/CC PDF file 273 kB
Word file 197 kB
2018-10-122018-12
TCDV
2018-12-142019-02
CCDV
121A/270/CDV
PDF file 1001 kB
2019-02-012019-02
CCDV
121A/270(F)/CDV PDF file 2117 kB
2019-02-012019-02
PRVC
2019-04-262019-04
AFDIS
121A/303/RVC PDF file 362 kB
Word file 37 kB
2019-05-102019-10
AFDIS
121A/303A/RVC PDF file 102 kB
Word file 60 kB
2019-05-102019-10
DECFDIS
2020-06-192020-06
RFDIS
2020-06-252020-07
CFDIS
121A/384/FDIS
2020-09-112020-09
PRVD
2020-10-232020-10
APUB
121A/392/RVD PDF file 146 kB
2020-11-062020-11
BPUB
2020-11-062020-11
PPUB
2020-12-152020-12
  

Abstract

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).

Project

IEC 60947-6-2:2020 ED3

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