IEC 60947-4-1:2009/AMD1:2012

Amendment 1 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters

Amendement 1 - Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs - Contacteurs et démarreurs électromécaniques

General Information

• Status: Published
• Publication Date: 19-Jul-2012
• ICS: 29.060.10 - Wires
• ICS: 29.120.99 - Other electrical accessories
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: SC 121A - Low-voltage switchgear and controlgear
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 25-Oct-2018

Relations

• Amends: IEC 60947-4-1:2009 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
• Effective Date: 05-Sep-2023
• Revised: IEC 60947-4-1:2018 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60947-4-1 ®
Edition 3.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 4-1: Contactors and motor-starters – Electromechanical contactors and
motor-starters
Appareillage à basse tension –
Partie 4-1: Contacteurs et démarreurs de moteurs – Contacteurs et démarreurs
électromécaniques
IEC 60947-4-1:2009/A1:2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,

please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les

microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.

Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette

publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: [e-mail].

A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.

Liens utiles:
Recherche de publications CEI - www.iec.ch/searchpub Electropedia - www.electropedia.org
La recherche avancée vous permet de trouver des Le premier dictionnaire en ligne au monde de termes
publications CEI en utilisant différents critères (numéro de électroniques et électriques. Il contient plus de 30 000
référence, texte, comité d’études,…). termes et définitions en anglais et en français, ainsi que
Elle donne aussi des informations sur les projets et les les termes équivalents dans les langues additionnelles.
publications remplacées ou retirées. Egalement appelé Vocabulaire Electrotechnique
International (VEI) en ligne.
Just Published CEI - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications de la CEI.
Just Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur
Disponible en ligne et aussi une fois par mois par email. cette publication ou si vous avez des questions
contactez-nous: [e-mail].
IEC 60947-4-1 ®
Edition 3.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –

Part 4-1: Contactors and motor-starters – Electromechanical contactors and

motor-starters
Appareillage à basse tension –

Partie 4-1: Contacteurs et démarreurs de moteurs – Contacteurs et démarreurs

électromécaniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 29.120.99; 29.130.20 ISBN 978-2-83220-142-8

– 2 – 60947-4-1 Amend.1 © IEC:2012

FOREWORD
This amendment has been prepared by subcommittee 17B: Low-voltage switchgear and

controlgear of IEC technical committee 17: Switchgear and controlgear.

The text of this amendment is based on the following documents:

FDIS Report on voting
17B/1769/FDIS 17B/1780/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
INTRODUCTION
This amendment includes the following significant technical changes with respect to the
previous edition 3 (2009):
• introduction of the motor management starter;
• definitions and measurement method of the power consumption of the control circuit
during holding and pick-up operations;
• measurement method of the pole impedance;
• requirements for screwless terminals;
• performance requirements for latched contactors;

• alignments to Amendment 1 of IEC 60947-1:2007;
• harmonisation with IEC 60947-2 of the operation tests of under-voltage relays and shunt
releases;
• short-circuit tests harmonisation with North America;
• test requirements for utilisation AC-6b capacitor load;
• polarity for DC contactors;
• dielectric test method in presence of built-in varistor;
• addition of an extended function for electronic overload relay: control functions.

60947-4-1 Amend.1 © IEC:2012 – 3 –

1.1.2 AC motor-starters
Add, in the first paragraph, the parenthesis "(including motor management starter)" between

"AC motor-starters" and "intended to start".

1.1.2.2.1 Star-delta starters
Replace, in the first sentence of the existing note, "the current" by "the starting current".

1.1.2.3 Rheostatic rotor starters
Delete the existing second paragraph and the existing note.

2 Normative references
Add to the existing list the following normative reference:
IEC 61051-2:1991, Varistors for use in electronic equipment – Part 2: Sectional specification
for surge suppression varistors

3.2 Alphabetical index of terms
Delete from the existing list the following terms and references:
electronic overload relay with current imbalance detection.H.2.2
electronic overload relay with ground/earth fault function .H.2.1
electronic overload relay with phase reversal function.H.2.4
electronic overload relay with under power detection .H.2.6
inhibit current (I ) .H.2.7
ic
Add to the existing list the following new terms and references:

holding power . 3.3.9
motor management starter . 3.4.31
pick-up power . 3.3.10

– 4 – 60947-4-1 Amend.1 © IEC:2012

3.3.8
electronically energized coil of electromagnet

Replace the existing term and definition by the following new term and new definition:

3.3.8.
electronically controlled electromagnet

electromagnet in which the coil is controlled by a circuit with active electronic elements

Add, after the existing definition 3.3.8, the following new terms and definitions 3.3.9 and

3.3.10:
3.3.9
holding power (of a contactor)
power needed to maintain the operation of the electromagnet
3.3.10
pick-up power (of a contactor)
power needed to operate the contactor from the de-energized state to the energized state

Add, after the existing definition 3.4.30, the following new term and definition 3.4.31:
3.4.31
motor management starter
starter including extended functions with communication ability
NOTE Interoperable device profiles for motor management starter are defined by IEC 61915-2.

3.6 Symbols and abbreviations
Add to the existing list the following new symbols:
P Nominal holding power of a d.c. controlled contactor
c
P Pick-up power of a d.c. controlled contactor with separate pick-up and hold-on windings
p
S Holding power of an a.c. controlled contactor
h
S Pick-up power of an a.c. controlled contactor
p
U Voltage drop of a contactor pole
d
Z Pole impedance of a contactor (5.3.7)
"r" Minimum short-circuit test current
I Maximum conditional short-circuit test current
q
Delete from the existing list "I Inhibit current (H.2.7)".
ic
60947-4-1 Amend.1 © IEC:2012 – 5 –

5.3.1.1.2 Rated rotor operational voltage (U )
er
Add, after the second paragraph, the following new paragraph and new note:

The rated insulation voltage of the switching devices inserted in the rotor circuit shall be at

least 50 % the highest voltage between open slip-rings.

NOTE Electrical stresses are lower and shorter in the rotor than in the stator.

5.3.5.5.2 Standard conditions for making and breaking corresponding to the
starting characteristics for rheostatic rotor starters
Delete the existing note.
Add, after the existing Subclause 5.3.6, the following new Subclause 5.3.7:
5.3.7 Pole impedance of a contactor (Z)
The pole impedance may be stated by the manufacturer and is determined by measuring the
voltage drop resulting of the current flowing through the pole.

5.5 Control circuits
Replace the entire existing text by the following new text:
Subclause 4.5 of IEC 60947-1:2007 applies.

5.7.3 Characteristic values
Replace the existing item c) by the following new item c):
c) Release with residual current sensing relay:
– rated current;
– operating current;
– operating time or time-current characteristic according to Table T.1 of
IEC 60947-1:2007, Amendment 1;
– inhibit time (when applicable);
– type designation (see Annex T of IEC 60947-1: 2007, Amendment 1).

6.1.2 Characteristics, basic rated values and utilization
Add, after the exiting item d), the following new item aa):
aa) polarity of terminals, if applicable;

– 6 – 60947-4-1 Amend.1 © IEC:2012

Add, after the existing item h), the following Note 1:

NOTE 1 Other information such as the pole impedance could be given e.g. in the product literature.

Replace the existing Note 1 of item o) by the following new Note 2:

NOTE 2 Other information such as the holding or pick-up power could be given e.g. in the product literature.

Renumber the existing Note 2 and Note 3 as Note 3 and Note 4 respectively.

6.2 Marking
Replace, in the existing third paragraph, "items c) in 6.1.1, k), and s2) in 6.1.2" by " items c)
in 6.1.1, aa), k), and s2) in 6.1.2".
Replace, at the end of the existing fourth paragraph, "and Annex E" by "and Annex U of
IEC 60947-1:2007, Amendment 1".

8.2.1.2 Limits of operation of contactors and power-operated starters
Replace the existing Subclauses 8.2.1.2.1 to 8.2.1.2.4 by the following new text:
Subclause 7.2.1.2 of IEC 60947-1:2007 applies with following additions:
For latched contactors, the device shall drop out and open fully when a de-latching voltage
between 85 % and 110 % of the rated de-latching voltage is applied.

Table 3 – Limits of operation of time-delay overload relays when energized on all poles
c
Delete the existing table footnote and its reference in the table.

d c
Renumber the existing table footnote and its four references in the table as .

e d
Renumber the existing table footnote and its two references in the table as .

a
Replace the text of the existing table footnote by the following new text:
This test shall only be done at 20 °C for A, B and D multiples of current setting.

a
Delete, in column D, the existing reference to the table footnote .

a
Add a new reference to the table footnote at the end of "Electronic type".

60947-4-1 Amend.1 © IEC:2012 – 7 –

8.2.2.7.1 Uninterrupted and eight-hour duty windings

Replace, in the first paragraph, "7.2.2.2" by "7.2.2.6".

8.2.3 Dielectric properties
Replace the entire existing text by the following new text:

Subclause 7.2.3 of IEC 60947-1:2007 applies with the foll
...