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12/15/2020 |
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Details
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 corrigenda of December 2021 and June 2023 have been included in this copy.
Additional Info
Author | International Electrotechnical Commission (IEC) |
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Committee | TC 121/SC 121A |
Published by | IEC |
Document type | Standard |
Edition | 3.0 |
ICS | 29.120.40 : Switches
29.130.20 : Low voltage switchgear and controlgear |
Number of pages | 225 |
Replace | IEC 60947-6-2:2002,IEC 60947-6-2:2002+AMD1:2007 Edition 2.1,IEC 60947-6-2:2002/AMD1:2007 |
Document history | IEC 60947-6-2:2002,IEC 60947-6-2:2002/AMD1:2007,IEC 60947-6-2:2002+AMD1:2007 Edition 2.1 |
Keyword | IEC60947-6-2,IEC 60947-6-2:2020,IEC 60947-6-2,TC 121/SC 121A |