EN IEC 60947-4-2:2023/A1:2024

SLOVENSKI STANDARD
01-februar-2025
Nizkonapetostne stikalne in krmilne naprave - 4-2. del: Kontaktorji in motorski
zaganjalniki - Polprevodniški krmilniki motorjev, zaganjalniki motorjev in mehki
zaganjalniki na izmenični tok - Dopolnilo A1 (IEC 60947-4-2:2020/AMD1:2024)
Low-voltage switchgear and controlgear - Part 4-2: Contactors and motor-starters -
Semiconductor motor controllers, starters and soft-starters (IEC 60947-4-
2:2020/AMD1:2024)
Niederspannungsschaltgeräte - Teil 4-2: Schütze und Motorstarter - Halbleiter-Motor-
Steuergeräte, Starter und Sanftstarter (IEC 60947-4-2:2020/AMD1:2024)
Appareillage à basse tension - Partie 4-2: Contacteurs et démarreurs de moteurs -
Gradateurs, démarreurs et démarreurs progressifs de moteurs à semiconducteurs (IEC
60947-4-2:2020/AMD1:2024)
Ta slovenski standard je istoveten z: EN IEC 60947-4-2:2023/A1:2024
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60947-4-2:2023/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2024
ICS 29.130.20
English Version
Low-voltage switchgear and controlgear - Part 4-2: Contactors
and motor-starters - Semiconductor motor controllers, starters
and soft-starters
(IEC 60947-4-2:2020/AMD1:2024)
Appareillage à basse tension - Partie 4-2 : Contacteurs et Niederspannungsschaltgeräte - Teil 4-2: Schütze und
démarreurs de moteurs - Gradateurs, démarreurs et Motorstarter - Halbleiter-Motor-Steuergeräte, Starter und
démarreurs progressifs à semiconducteurs de moteurs Sanftstarter
(IEC 60947-4-2:2020/AMD1:2024) (IEC 60947-4-2:2020/AMD1:2024)
This amendment A1 modifies the European Standard EN IEC 60947-4-2:2023; it was approved by CENELEC on 2024-12-10. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60947-4-2:2023/A1:2024 E

European foreword
The text of document 121A/615/FDIS, future edition 4 of IEC 60947-4-2/AMD1, prepared by SC 121A
"Low-voltage switchgear and controlgear" of IEC/TC 121 "Switchgear and controlgear and their
assemblies for low voltage" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60947-4-2:2023/A1:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-12-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-12-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60947-4-2:2020/AMD1:2024 was approved by CENELEC
as a European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC/TR 63216 NOTE Approved as CLC IEC/TR 63216
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60445 2021 Basic and safety principles for man-machine EN IEC 60445 2021
interface, marking and identification -
Identification of equipment terminals,
conductor terminations and conductors
IEC 63404 2024 Switchgear and controlgear and their - -
assemblies for low voltage - Integration of
radiocommunication device above 380 MHz
into an equipment
IEC/TS 63058 - Switchgear and controlgear and their - -
assemblies for low voltage - Environmental
aspects
IEC 60947-4-2 ®
Edition 4.0 2024-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 4-2: Contactors and motor-starters – Semiconductor motor controllers,
starters and soft-starters
Appareillage à basse tension –
Partie 4-2: Contacteurs et démarreurs de moteurs – Gradateurs, démarreurs et
démarreurs progressifs à semiconducteurs de moteurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-9820-6
– 2 – IEC 60947-4-2:2020/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 4-2: Contactors and motor-starters –
Semiconductor motor controllers, starters and soft-starters

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch [and/or]
www.iso.org/patents. IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 60947-4-2:2020 has been prepared by subcommittee 121A: Low-voltage
switchgear and controlgear, of IEC technical committee 121: Switchgear and controlgear and
their assemblies for low voltage.
This amendment includes the following significant technical changes with respect to the current
edition:
– Requirement for starter intended to be used with high efficiency motors.
– Requirements and tests for abnormal conditions equivalent to Annex DVE of the UL version.
– Alignment to the EMC environments defined in IEC TR 63216 and more detailed emission
limit requirements.
IEC 60947-4-2:2020/AMD1:2024 – 3 –
© IEC 2024
– Reference to IEC TS 63058 for environmental information.
– Reference to IEC 63404 for the integration of radio communication.
The text of this Amendment is based on the following documents:
Draft Report on voting
121A/615/FDIS 121A/626/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
A list of all parts in the IEC 60947 series, published under the general title Low-voltage
switchgear and controlgear, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
___________
1 Scope
Delete footnote 1.
2 Normative references
Replace the existing reference:
IEC 60445, Basic and safety principles for man-machine interface, marking and identification –
Identification of equipment terminals, conductor terminations and conductors
with
IEC 60445:2021, Basic and safety principles for man-machine interface, marking and
identification – Identification of equipment terminals, conductor terminations and conductors

– 4 – IEC 60947-4-2:2020/AMD1:2024
© IEC 2024
Add the following references to the list:
IEC 63404:2024, Switchgear and controlgear and their assemblies for low voltage – Integration
of radiocommunication device above 380 MHz into an equipment
IEC TS 63058, Environmental aspects for low-voltage switchgear and controlgear and their
assemblies
5.3.2.5 Maximum OFF-state current (I )
Lm
Replace the reference to "9.3.3.6.3" with "9.3.3.6.4".

5.3.5.4.1 Starting characteristics of squirrel cage and hermetic refrigeration motors
Replace the third paragraph with the following:
Two directions of rotation are not covered by this document.
Delete the fourth paragraph.
5.4.1 General
Replace the second paragraph with the following:
For semiconductor motor controllers, starters and soft-starters, the utilization categories are
given in Table 1.
5.6 Auxiliary circuits
Delete the second sentence of the third paragraph.

5.7.5 Time-current
...