SIST EN IEC 60947-4-1:2019

Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2018)

IEC 60947-4-1:2018 is available as IEC 60947-4-1:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60947-4-1:2018 is applicable to the following equipment:
- electromechanical contactors and starters including motor protective switching device (MPSD);
- actuators of contactor relays;
- contacts dedicated exclusively to the coil circuit of this contactor or this contactor relay;
- dedicated accessories (e.g. dedicated wiring, dedicated latch accessory);
intended to be connected to distribution circuits, motors circuits and other load circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC. This fourth edition cancels and replaces the third edition published in 2009 and its Amendment 1:2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Scope structure and exclusions
- Editorial correction of notes and hanging paragraphs
- Reference to IEC 62683-1
- Motor protective switching device (MPSD) with its requirements
- Safety aspects related to:
- General aspects;
- Limited energy circuits;
- Electronic circuits;
- Assessment procedure for electromechanical overload protection used in safety -applications (new Annex L)
- Introduction of provisions covering the impact of higher locked rotor current to achieve high efficiency class
- Mention of dedicated wiring accessories
- Pickup power measurement
- Alignment to IEC 60947-1:2007, IEC 60947-1:2007/AMD1:2010, and IEC 60947‑1:2007/AMD2:2014
- Direct current requirements for covering photovoltaic application (new Annex M)
- Load monitoring indicators (new Annex O)
- Short-circuit breaking tests of MPSD (new Annex P)
- Co-ordination under short-circuit conditions between a MPSD and another short-circuit protective device associated in the same circuit (new Annex Q).

Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische Schütze und Motorstarter (IEC 60947-4-1:2018)

Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs - Contacteurs et démarreurs électromécaniques (IEC 60947-4-1:2018)

IEC 60947-4-1:2018 est disponible sous forme de IEC 60947-4-1:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 60947-4-1:2018 s'applique aux équipements suivants:
- contacteurs électromécaniques et démarreurs, y compris les appareils de connexion de protection des moteurs (ACPM);
- organes de commande de contacteurs auxiliaires;
- contacts destinés exclusivement au circuit de la bobine de ce contacteur ou ce contacteur auxiliaire;
- accessoires dédiés (câblage dédié, accessoires d'accrochage dédié, par exemple);
destinés à être connectés à des circuits de distribution, des circuits de moteur et à d'autres circuits de charge, dont la tension assignée ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu. Cette quatrième édition annule et remplace la troisième édition parue en 2009, ainsi que son Amendement 1:2012. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Structure du domaine d'application et exclusions
- Corrections rédactionnelles des notes et des alinéas suspendus
- Référence à l'IEC 62683-1
- Appareil de connexion de protection des moteurs (ACPM) accompagné de ses exigences
- Aspects relatifs à la sécurité:
- Aspects généraux;
- Circuits limités en énergie;
- Circuits électroniques;
- Procédure d'évaluation de la protection électromécanique contre les surcharges utilisée dans des applications de sécurité (nouvelle Annexe L)
- Introduction des dispositions relatives à l'impact du courant rotor bloqué plus élevé afin d'atteindre une classe de rendement supérieure
- Mention des accessoires de câblage dédiés
- Mesurage de la puissance d'appel
- Alignement avec l'IEC 60947-1:2007, l'IEC 60947-1:2007/AMD1:2010, et l'IEC 60947‑1:2007/AMD2:2014
- Exigences en matière de courant continu pour couvrir les applications photovoltaïques (nouvelle Annexe M)
- Indicateurs de surveillance de charge (nouvelle Annexe O)
- Essais de coupure en court-circuit de l’ACPM (nouvelle Annexe P)
- Coordination dans les conditions de court-circuit entre un ACPM et un autre dispositif de protection contre les courts-circuits associés dans le même circuit (nouvelle Annexe Q).

Nizkonapetostne stikalne in krmilne naprave - 4-1. del: Kontaktorji in motorski zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-1:2018)

Ta del standarda IEC 60947 se uporablja za naslednjo opremo:
– elektromehanske kontaktorje in zaganjalnike, vključno z motorsko zaščitno stikalno napravo (MPSD);
– sprožilnike kontaktorskih relejev;
– kontakte, ki so namenjeni izključno tokokrogu tuljave tega kontaktorja ali tega kontaktorskega releja;
– namenski pribor (npr. namensko ožičenje, namenski zapah);
namenjeno za priključitev v razdelilne tokokroge, motorska vezja in druge obremenitvene tokokroge, katerih nazivna napetost ne presega 1000 V pri izmeničnem toku oziroma 1500 V pri enosmernem toku.
Ta dokument zajema tudi postopek ocenjevanja za elektromehansko zaščito pred preobremenitvijo, namenjeno varnostni uporabi, kot je zaščita motorja v eksplozivnem okolju pred vplivi zunanjega okolja: glej dodatek L.
Ta dokument se ne uporablja za:
– zaganjalnike za motorje na enosmerni tok1;
OPOMBA 1: Zahteve za zaganjalnike za motorje na enosmerni tok so v obravnavi za naslednji cikel vzdrževanja.
– pomožne kontakte kontaktorjev in kontakte kontaktorskih relejev; ti so zajeti v standardu IEC 60947-5-1;
– zaganjalnik, ki se uporablja na nizkonapetostni strani frekvenčnega pretvornika1;
OPOMBA 2: Dodatne zahteve za zaganjalnik, ki se uporablja na nizkonapetostni strani frekvenčnega pretvornika, so v obravnavi za naslednji cikel vzdrževanja.
– napravo za zaščito pred kratkim stikom, vgrajeno v zaganjalnikih, ki niso motorske zaščitne stikalne naprave; to je zajeto v standardih IEC 60947-2 in IEC 60947-3;
– uporabo izdelka z uvedbo dodatnih ukrepov v eksplozivnih okoljih; ti so podani v skupini standardov IEC 60079;
– pravila za načrtovanje vdelane programske opreme1;
– vidike kibernetske varnosti; ti so zajeti v skupini standardov IEC 62443.
Namen tega dokumenta je navesti:
a) značilnosti opreme;
b) pogoje, ki veljajo za opremo v zvezi z:
1) njenim delovanjem in obnašanjem,
2) njenimi dielektričnimi lastnostmi,
3) njeno stopnjo zaščite,
4) njeno konstrukcijo, vključno z zaščito pred električnim udarom, požarno ogroženostjo in mehanskim tveganjem;
c) preskuse, katerih cilj je potrditi, da so bili ti pogoji in metode izvajanja teh preskusov izpolnjeni;
d) informacije, ki se predložijo z opremo ali navedejo v navodilih proizvajalca.

General Information

• Status: Published
• Public Enquiry End Date: 07-Sep-2017
• Publication Date: 01-Apr-2019
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: SKA - Switchgear and control gear
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-Mar-2019
• Due Date: 01-Jun-2019
• Completion Date: 02-Apr-2019
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Ref Project: EN IEC 60947-4-1:2019 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters

Relations

• Replaces: SIST EN 60947-4-1:2010 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2009)
• Effective Date: 26-Mar-2019
• Replaces: SIST EN 60947-4-1:2010/A1:2012 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2009/A1:2012)
• Effective Date: 26-Mar-2019
• Replaced By: SIST EN IEC 60947-4-1:2025 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2023)
• Effective Date: 01-Nov-2025
• Corrected By: SIST EN IEC 60947-4-1:2019/AC:2021 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2018/COR2:2021)
• Effective Date: 06-May-2021
• Corrected By: SIST EN IEC 60947-4-1:2019/AC:2020 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2018/COR1:2020)
• Effective Date: 12-May-2020
• Revised: SIST EN 60947-4-1:2010 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2009)
• Effective Date: 02-Aug-2016
• Revised: SIST EN 60947-4-1:2010/A1:2012 - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 60947-4-1:2009/A1:2012)
• Effective Date: 02-Aug-2016

Overview

SIST EN IEC 60947-4-1:2019 (IEC 60947-4-1:2018) is the fourth-edition European/International standard for low-voltage switchgear and controlgear covering electromechanical contactors and motor‑starters. It defines requirements for design, rated values, performance and safety for contactors, starters (including Motor Protective Switching Devices - MPSD), actuators and dedicated accessories intended for circuits with rated voltages up to 1 000 V AC or 1 500 V DC. The publication includes a Redline (RLV) version showing technical changes versus the previous edition.

Key topics and technical requirements

• Scope and classification of electromechanical contactors and starters, number of poles and kind of current (AC/DC).
• Rated and limiting values for main circuits (voltages, currents) and characteristic quantities.
• Motor Protective Switching Device (MPSD): new requirements and short-circuit breaking tests (Annex P).
• Safety and functional aspects:
  • General safety provisions and assessment procedures for overload protection used in safety applications (new Annex L).
  • Requirements for limited energy circuits and electronic circuits.
• Performance and testing:
  • Pickup power measurement and tests related to higher locked-rotor currents for high-efficiency motors.
  • Load monitoring indicators (new Annex O).
  • Short-circuit coordination between an MPSD and associated protective devices (new Annex Q).
• Application-specific additions:
  • Direct current requirements for photovoltaic (PV) applications (new Annex M).
  • Mention and treatment of dedicated wiring accessories and latch accessories.
• Editorial and alignment changes with IEC 60947-1 series, reference to IEC 62683-1 and other normative documents.

Practical applications and users

This standard is essential for:

• Manufacturers of electromechanical contactors, starters and MPSDs for product design, type testing and declaration of rated data.
• Electrical designers and panel builders specifying contactors and motor‑starters in motor control centers, industrial automation, HVAC and PV systems.
• Test laboratories and certification bodies performing conformance, endurance and short‑circuit tests.
• Compliance officers and procurement teams ensuring products meet EU Directives (EMC and Low Voltage Directive) and harmonized standard requirements.

Practical benefits include safer motor control equipment, improved compatibility in assemblies, better short‑circuit coordination, and clearer guidance for PV and high‑efficiency motor applications.

Related standards

• IEC/EN 60947-1 (General rules)
• IEC 60947-2 (Circuit-breakers)
• IEC 60947-5-1 (Control circuit devices)
• IEC 62683-1 (referenced)
• Other referenced standards: IEC 60034 series (motors), IEC 61000 (EMC), IEC 61439 (assemblies)

Keywords: low-voltage switchgear, electromechanical contactors, motor-starters, MPSD, IEC 60947-4-1, photovoltaic, short-circuit coordination, load monitoring, safety.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2019
Nadomešča:
SIST EN 60947-4-1:2010
SIST EN 60947-4-1:2010/A1:2012
Nizkonapetostne stikalne in krmilne naprave - 4-1. del: Kontaktorji in motorski
zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-
1:2018)
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters (IEC 60947-4-1:2018)
Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische
Schütze und Motorstarter (IEC 60947-4-1:2018)
Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs -
Contacteurs et démarreurs électromécaniques (IEC 60947-4-1:2018)
Ta slovenski standard je istoveten z: EN IEC 60947-4-1:2019
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 60947-4-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 29.120.99; 29.130.20 Supersedes EN 60947-4-1:2010
English Version
Low-voltage switchgear and controlgear - Part 4-1: Contactors
and motor-starters - Electromechanical contactors and motor-
starters
(IEC 60947-4-1:2018)
Appareillage à basse tension - Partie 4-1: Contacteurs et Niederspannungsschaltgeräte - Teil 4-1: Schütze und
démarreurs de moteurs - Contacteurs et démarreurs Motorstarter - Elektromechanische Schütze und
électromécaniques Motorstarter
(IEC 60947-4-1:2018) (IEC 60947-4-1:2018)
This European Standard was approved by CENELEC on 2018-11-29. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60947-4-1:2019 E

European foreword
The text of document 121A/224/FDIS, future edition 4 of IEC 60947-4-1, 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
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2019-09-22
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-03-22
document have to be withdrawn
This document supersedes EN 60947-4-1:2010.
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.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directives
2014/30/EU and 2014/35/EU.
For the relationship with the EU Directive 2014/30/EU see informative Annex ZZA and for the
relationship with the EU Directive 2014/35/EU see informative Annex ZZB, which are integral parts of
this document.
Endorsement notice
The text of the International Standard IEC 60947-4-1:2018 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60068-2-2:2007 NOTE Harmonized as EN 60068-2-2:2007 (not modified)
IEC 60079 (series) NOTE Harmonized as EN 60079 (series)
IEC 60079-7 NOTE Harmonized as EN 60079-7
IEC 60079-29-3 NOTE Harmonized as EN 60079-29-3
IEC 60269-1:2006 NOTE Harmonized as EN 60269-1:2007 (not modified)
IEC 60269-2:2013 NOTE Harmonized as HD 60269-2:2013 (modified)
IEC 60664-1:2007 NOTE Harmonized as EN 60664-1:2007 (not modified)
IEC 60812:2006 NOTE Harmonized as EN 60812:2006 (not modified)
IEC 60947-3 NOTE Harmonized as EN 60947-3
IEC 60947-8 NOTE Harmonized as EN 60947-8
IEC 60990:2016 NOTE Harmonized as EN 60990:2016 (not modified)
IEC 61000-6-5 NOTE Harmonized as EN 61000-6-5
IEC 61032 NOTE Harmonized as EN 61032
IEC 61095:2009 NOTE Harmonized as EN 61095:2009 (not modified)
IEC 61508-2 NOTE Harmonized as EN 61508-2
IEC 61508-3 NOTE Harmonized as EN 61508-3
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010 (not modified)
IEC 61508-6:2010 NOTE Harmonized as EN 61508-6:2010 (not modified)
IEC 61649 NOTE Harmonized as EN 61649
IEC 61915-2:2011 NOTE Harmonized as EN 61915-2:2012 (not modified)
IEC 62061 NOTE Harmonized as EN 62061
IEC 62443 (series) NOTE Harmonized as EN 62443 (series)
IEC 62477-1:2012 NOTE Harmonized as EN 62477-1:2012 (not modified)
IEC 62683-1 NOTE Harmonized as EN 62683-1
ISO/IEC 80079-34 NOTE Harmonized as EN ISO/IEC 80079-34
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-1 2017 Rotating electrical machines - Part 1: - -
Rating and performance
IEC 60034-12 2016 Rotating electrical machines - Part 12: EN 60034-12 2017
Starting performance of single-speed
three-phase cage induction motors
IEC 60034-30-1 - Rotating electrical machines - Part 30-1: EN 60034-30-1 2014
Efficiency classes of line operated AC
motors (IE code)
IEC 60038 (mod) - IEC standard voltages EN 60038 2011
IEC 60068-2-14 2009 Environmental testing - Part 2-14: Tests - EN 60068-2-14 2009
Test N: Change of temperature
IEC 60079-14 - Explosive atmospheres - Part 14: Electrical EN 60079-14 2014
installations design, selection and erection
IEC 60085 2007 Electrical insulation - Thermal evaluation EN 60085 2008
and designation
IEC 60364-1 (mod) 2005 Low-voltage electrical installations - Part 1: HD 60364-1 2008
Fundamental principles, assessment of
general characteristics, definitions
- -  + A11 2017
IEC 60364-7-712 - Electrical installations of buildings -- Part 7- HD 60364-7-712 2005
712: Requirements for special installations
or locations - Solar photovoltaic (PV)
power supply systems
- -  + corrigendum 2006
IEC 60715 2017 Dimensions of low-voltage switchgear and EN 60715 2017
controlgear - Standardized mounting on
rails for mechanical support of switchgear,
controlgear and accessories
IEC 60730-1 (mod) - Automatic electrical controls - Part 1: EN 60730-1 2016
General requirements
Publication Year Title EN/HD Year
IEC 60947-1 2007 Low-voltage switchgear and controlgear - EN 60947-1 2007
Part 1: General rules
+ A1 2010  + A1 2011
+ A2 2014  + A2 2014
IEC 60947-2 2016 Low-voltage switchgear and controlgear - EN 60947-2 2017
Part 2: Circuit-breakers
+COR 1 2016
IEC 60947-5-1 2016 Low-voltage switchgear and controlgear - EN 60947-5-1 2017
Part 5-1: Control circuit devices and
switching elements - Electromechanical
control circuit devices
+COR 1 2016
- -
IEC 61000-6-2 - Electromagnetic compatibility (EMC) - Part EN 61000-6-2 2019
6-2: Generic standards - Immunity
standard for industrial environments
IEC 61051-2 1991 Varistors for use in electronic equipment - - -
Part 2: Sectional specification for surge
suppression varistors
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 61439 series Low-voltage switchgear and controlgear EN 61439 series
assemblies
IEC 61810-1 - Electromechanical elementary relays - Part EN 61810-1 2015
1: General and safety requirements
CISPR 11 (mod) 2015 Industrial, scientific and medical equipment EN 55011 2016
- Radio-frequency disturbance
characteristics - Limits and methods of
measurement
+ A1 2016  + A1 2017
ISO 2859-1 1999 Sampling procedures for inspection by - -
attributes -- Part 1: Sampling schemes
indexed by acceptance quality limit (AQL)
for lot-by-lot inspection
ISO 3864-2 2016 Graphical symbols - Safety colours and - -
safety signs – Part 2: Design principles for
product safety labels
Dated as no equivalent European Standard exists.
Annex ZZA
(informative)
Relationship between this European standard and the essential requirements
of Directive 2014/30/EU [2014 OJ L96] aimed to be covered and the
standardisation request M/552
This European standard has been prepared under the European Commission standardisation request
C(2016) 7641 final of 30.11.2016 , ('M/552'), as regards harmonised standards in support of Directive
2014/30/EU relating to electromagnetic compatibility, to provide one voluntary means of conforming to
essential requirements of Directive 2014/30/EU of the European Parliament and of the Council of 26
February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic
compatibility [2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZA.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding essential
requirements of that Directive, and associated EFTA regulations.

Table ZZA.1 – Correspondence between this European standard and the
Essential Requirements set out in Directive 2014/30/EU [2014 OJ L96]

Essential requirements of Clause(s) / sub-clause(s)
Remarks / Notes
Directive 2014/30/EU of this EN
Annex I. 1(a) (electromagnetic 2, 8.3.3, 9.4.1, 9.4.3
disturbances)
Annex I. 1(b) (electromagnetic 2, 8.3.1, 8.3.2, 9.4.1, 9.4.2
immunity)
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
COMMISSION IMPLEMENTING DECISION C(2016) 7641 final of 30.11.2016 on a standardisation request to the
European Committee for Standardisation, to the European Committee for Electrotechnical Standardisation and to the
European Telecommunications Standards Institute as regards harmonised standards in support of Directive 2014/30/EU
of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member
States relating to electromagnetic compatibility.
Annex ZZB
(informative)
Relationship between this European standard and the safety objectives of
Directive 2014/35/EU [2014 OJ L96] aimed to be covered

This European standard has been prepared under a Commission’s standardization request relating to
harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZB.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.

Table ZZB.1 – Correspondence between this European standard and Annex I of
Directive 2014/35/EU [2014 OJ L96]

Safety objectives of Clause(s) / sub-clause(s) of this EN Remarks/note
Directive 2014/35/EU
1 a) 2, 3, 5, 6, 8, Annex A, Annex B, Annex F,
Annex K, Annex M, Annex P, Annex Q
1 b) 2, 3, 5, 6, 7, 8, 9, Annex A, Annex F,
Annex G, Annex L, Annex M, Annex N,
Annex Q
1 c) 1, 2, 3, 5, 6, 7, 8,9, Annex A, Annex B,
Annex D, Annex F, Annex G, Annex H,
Annex I, Annex K, Annex L, Annex M,
Annex O, Annex P, Annex Q
2 a) 2, 3, 5, 6, 8, 9, Annex N
2 b) 2, 3, 5, 6, 8.1, 9, Annex L
2 c) 1, 2, 3, 5, 6, 7, 8, Annex F, Annex K, Annex L
2 d) 2, 3, 5, 6, 8, 9, Annex B, Annex F, Annex K,
Annex L, Annex M, Annex N, Annex P
3 a) 2, 3, 5, 6, 7, 8, 9, Annex L, Annex M
3 b) 2, 3, 5, 6, 7, 8, 9, Annex B, Annex D,
Annex G, Annex I, Annex K, Annex L,
Annex M, Annex P, Annex Q
3 c) 2, 3, 5, 6, 8, 9, Annex B, Annex D, Annex H,
Annex L, Annex P, Annex Q
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
IEC 60947-4-1 ®
Edition 4.0 2018-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
INTERNATIONALE
ICS 29.120.99, 29.130.20 ISBN 978-2-8322-5922-1

– 2 – IEC 60947-4-1:2018 © IEC 2018
CONTENTS
FOREWORD . 10
INTRODUCTION . 13
1 Scope . 14
2 Normative references . 15
3 Terms, definitions, symbols and abbreviated terms . 16
3.1 General . 16
3.2 Alphabetical index of terms . 16
3.3 Terms and definitions concerning contactors . 18
3.4 Terms and definitions concerning starters . 19
3.5 Terms and definitions concerning characteristic quantities . 25
3.6 Terms and definitions concerning safety aspects . 26
3.7 Symbols and abbreviated terms . 27
4 Classification . 28
5 Characteristics of contactors and starters . 28
5.1 Summary of characteristics . 28
5.2 Type of equipment . 29
5.2.1 Kind of equipment . 29
5.2.2 Number of poles . 29
5.2.3 Kind of current (AC or DC) . 29
5.2.4 Interrupting medium (air, oil, gas, vacuum, etc.) . 29
5.2.5 Operating conditions of the equipment . 29
5.3 Rated and limiting values for main circuits . 29
5.3.1 Rated voltages . 29
5.3.2 Currents or powers . 31
5.3.3 Rated frequency . 32
5.3.4 Rated duties . 32
5.3.5 Normal load and overload characteristics . 33
5.3.6 Short-circuit characteristics . 35
5.3.7 Pole impedance of a contactor (Z) . 36
5.4 Utilization category . 36
5.4.1 General . 36
5.4.2 Assignment of utilization categories based on the results of tests . 36
5.5 Control circuits . 38
5.6 Auxiliary circuits . 39
5.7 Characteristics of relay and release of overload relays and motor protective
switching device (MPSD) . 39
5.7.1 Summary of characteristics . 39
5.7.2 Types of relay or release . 39
5.7.3 Characteristic values . 39
5.7.4 Designation and current settings of overload relays . 41
5.7.5 Time-current characteristics of overload relays . 41
5.7.6 Influence of ambient air temperature. 42
5.8 Co-ordination with short-circuit protective devices . 42
5.9 Void . 42
5.10 Types and characteristics of automatic change-over devices and automatic
acceleration control devices . 42

IEC 60947-4-1:2018 © IEC 2018 – 3 –
5.10.1 Types . 42
5.10.2 Characteristics. 42
5.11 Types and characteristics of auto-transformers for two-step auto-transformer
starters . 43
5.12 Types and characteristics of starting resistors for rheostatic rotor starters . 43
6 Product information . 43
6.1 Nature of information . 43
6.1.1 Identification . 43
6.1.2 Characteristics, basic rated values and utilization . 44
6.2 Marking . 45
6.3 Instructions for installation, operation, maintenance, decommissioning and
dismantling . 46
6.4 Environmental information . 46
7 Normal service, mounting and transport conditions . 46
8 Constructional and performance requirements . 47
8.1 Constructional requirements . 47
8.1.1 General . 47
8.1.2 Materials . 47
8.1.3 Current-carrying parts and their connections . 48
8.1.4 Clearances and creepage distances . 48
8.1.5 Actuator . 48
8.1.6 Indication of the contact position . 49
8.1.7 Additional requirements for equipment suitable for isolation . 49
8.1.8 Terminals . 49
8.1.9 Additional requirements for equipment provided with a neutral pole . 49
8.1.10 Provisions for protective earthing . 49
8.1.11 Enclosures for equipment . 49
8.1.12 Degrees of protection of enclosed equipment . 50
8.1.13 Conduit pull-out, torque and bending with metallic conduits . 50
8.1.14 Limited energy source . 50
8.1.15 Stored charge energy circuit . 52
8.1.16 Fault and abnormal conditions . 52
8.1.17 Short-circuit and overload protection of ports . 53
8.2 Performance requirements . 53
8.2.1 Operating conditions . 53
8.2.2 Temperature-rise . 59
8.2.3 Dielectric properties . 61
8.2.4 Normal load and overload performance requirements . 62
8.2.5 Co-ordination with short-circuit protective devices . 68
8.3 Electromagnetic compatibility (EMC) . 71
8.3.1 General . 71
8.3.2 Immunity . 71
8.3.3 Emission . 72
9 Tests . 72
9.1 Kinds of test . 72
9.1.1 General . 72
9.1.2 Type tests . 73
9.1.3 Routine tests . 73

– 4 – IEC 60947-4-1:2018 © IEC 2018
9.1.4 Sampling tests . 73
9.1.5 Special tests . 74
9.2 Compliance with constructional requirements . 75
9.2.1 General . 75
9.2.2 Electrical performance of screwless-type clamping units . 75
9.2.3 Ageing test for screwless-type clamping units . 75
9.2.4 Limited energy source test . 76
9.2.5 Breakdown of components . 76
9.3 Compliance with performance requirements . 77
9.3.1 Test sequences . 77
9.3.2 General test conditions . 78
9.3.3 Performance under no load, normal load and overload conditions . 78
9.3.4 Performance under short-circuit conditions . 90
9.3.5 Overload current withstand capability of contactors . 95
9.3.6 Routine tests and sampling tests . 95
9.4 EMC tests . 97
9.4.1 General . 97
9.4.2 Immunity . 97
9.4.3 Emission . 99
Annex A (normative) Marking and identification of terminals of contactors, starters and
associated overload relays . 101
A.1 General . 101
A.2 Marking and identification of terminals of main circuits . 101
A.3 Marking and identification of terminals of overload relays . 101
Annex B (normative) Special tests . 103
B.1 General . 103
B.2 Mechanical durability . 103
B.2.1 General . 103
B.2.2 Verification of mechanical durability . 103
B.3 Electrical durability . 105
B.3.1 General . 105
B.3.2 Results to be obtained . 106
B.3.3 Statistical analysis of test results for contactors or starters . 106
B.4 Coordination at the crossover current between the starter and associated
SCPD . 107
B.4.1 General and definitions . 107
B.4.2 Condition for the test for the verification of co-ordination at the
crossover current by a direct method . 108
B.4.3 Test currents and test circuits . 108
B.4.4 Test procedure and results to be obtained . 108
B.4.5 Verification of co-ordination at the crossover current by an indirect
method . 108
Annex C (informative) Typical characteristics of starters . 111
Annex D (informative) Items subject to agreement between manufacturer and user . 118
Annex E (Void) . 119
Annex F (normative) Requirements for auxiliary contact linked with power contact
(mirror contact) . 120
F.1 Application and object . 120
F.1.1 Application . 120

IEC 60947-4-1:2018 © IEC 2018 – 5 –
F.1.2 Object . 120
F.2 Terms and definitions . 120
F.3 Characteristics . 120
F.4 Product information . 120
F.5 Normal service, mounting and transport conditions . 121
F.6 Constructional and performance requirements . 121
F.7 Tests . 121
F.7.1 General . 121
F.7.2 Tests on products in a new condition . 121
F.7.3 Test after conventional operational performance (defined under Table
13) . 122
Annex G (informative) Rated operational currents and rated operational powers of
switching devices for electrical motors . 123
G.1 General . 123
G.2 Rated operational powers and rated operational currents . 123
Annex H (normative) Extended functions to electronic overload relays . 127
H.1 General . 127
H.2 Terms and definitions . 127
H.3 Limits of operation of control functions . 127
H.3.1 General . 127
H.3.2 Limits of electronic overload relay with main circuit under-voltage
restarting function . 127
H.4 Test of the control functions . 128
Annex I (informative) AC-1 contactors for use with semiconductor controlled motor
load . 129
Annex J (Void) . 130
Annex K (normative) Procedure to determine data for electromechanical contactors
used in functional safety applications . 131
K.1 General . 131
K.2 Test requirements . 131
K.3 Characterization of a failure mode . 131
K.4 Failure ratios of a contactor . 131
Annex L (normative) Assessment procedure for electromechanical overload protection
used in safety applications and especially in explosive atmospheres . 133
L.1 Application and object . 133
L.1.1 Application . 133
L.1.2 Object . 133
L.2 Terms, definitions and symbols . 133
L.2.1 Terms and definitions . 133
L.2.2 Symbols and abbreviations . 134
L.3 Procedure . 135
L.3.1 General . 135
L.3.2 Safety design process . 135
L.4 Requirements . 136
L.4.1 General . 136
L.4.2 Safety plan . 136
L.4.3 Design . 137
L.4.4 Failure mode and effects analysis of the safety function . 137
L.4.5 Design plan . 138

– 6 – IEC 60947-4-1:2018 © IEC 2018
L.4.6 Verification . 138
L.4.7 Function assessed . 138
L.5 Documentation . 138
L.5.1 Technical safety documentation . 138
L.5.2 Safety instructions . 138
L.6 Example. 139
L.6.1 architecture description . 139
L.6.2 FMEA . 140
Annex M (normative) DC contactors for use in photovoltaic (PV) applications . 148
M.1 Application . 148
M.2 Object . 148
M.3 Terms and definitions . 148
M.4 Classification . 149
M.5 Characteristics . 149
M.5.1 General . 149
M.5.2 Rated impulse withstand voltage. 149
M.5.3 Utilization category . 149
M.6 Product information . 150
M.7 Normal service, mounting and transport conditions . 150
M.7.1 General . 150
M.7.2 Ambient air temperature . 150
M.7.3 Altitude . 150
M.8 Constructional and performance requirements . 151
M.8.1 Constructional requirements . 151
M.8.2 Performance requirements . 151
M.8.3 Electromagnetic compatibility (EMC) . 152
M.9 Tests . 152
M.9.1 General . 152
M.9.2 Type tests . 152
M.9.3 Making and breaking capacities and conventional operational
performance . 153
M.9.4 Thermal cycling test . 153
M.9.5 Climatic test. 153
M.9.6 Dielectric test . 153
M.9.7 Critical load current test . 154
M.9.8 Mechanical properties . 155
M.9.9 Degree of protection of enclosed contactors . 156
M.9.10 EMC . 156
M.9.11 Clearance and creepage distances . 156
Annex N (normative) Additional requirements and tests for equipment with protective
separation . 157
N.1 General . 157
N.2 Definitions. 157
N.3 Requirements . 157
N.3.1 Test method for implementing protective impedance . 157
N.3.2 Touch cu
...

SLOVENSKI STANDARD
01-maj-2019
Nadomešča:
SIST EN 60947-4-1:2010
SIST EN 60947-4-1:2010/A1:2012
Nizkonapetostne stikalne in krmilne naprave - 4-1. del: Kontaktorji in motorski
zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-
1:2018)
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters (IEC 60947-4-1:2018)
Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische
Schütze und Motorstarter (IEC 60947-4-1:2018)
Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs -
Contacteurs et démarreurs électromécaniques (IEC 60947-4-1:2018)
Ta slovenski standard je istoveten z: EN IEC 60947-4-1:2019
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 60947-4-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 29.120.99; 29.130.20 Supersedes EN 60947-4-1:2010
English Version
Low-voltage switchgear and controlgear - Part 4-1: Contactors
and motor-starters - Electromechanical contactors and motor-
starters
(IEC 60947-4-1:2018)
Appareillage à basse tension - Partie 4-1: Contacteurs et Niederspannungsschaltgeräte - Teil 4-1: Schütze und
démarreurs de moteurs - Contacteurs et démarreurs Motorstarter - Elektromechanische Schütze und
électromécaniques Motorstarter
(IEC 60947-4-1:2018) (IEC 60947-4-1:2018)
This European Standard was approved by CENELEC on 2018-11-29. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60947-4-1:2019 E

European foreword
The text of document 121A/224/FDIS, future edition 4 of IEC 60947-4-1, 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
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2019-09-22
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-03-22
document have to be withdrawn
This document supersedes EN 60947-4-1:2010.
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.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directives
2014/30/EU and 2014/35/EU.
For the relationship with the EU Directive 2014/30/EU see informative Annex ZZA and for the
relationship with the EU Directive 2014/35/EU see informative Annex ZZB, which are integral parts of
this document.
Endorsement notice
The text of the International Standard IEC 60947-4-1:2018 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60068-2-2:2007 NOTE Harmonized as EN 60068-2-2:2007 (not modified)
IEC 60079 (series) NOTE Harmonized as EN 60079 (series)
IEC 60079-7 NOTE Harmonized as EN 60079-7
IEC 60079-29-3 NOTE Harmonized as EN 60079-29-3
IEC 60269-1:2006 NOTE Harmonized as EN 60269-1:2007 (not modified)
IEC 60269-2:2013 NOTE Harmonized as HD 60269-2:2013 (modified)
IEC 60664-1:2007 NOTE Harmonized as EN 60664-1:2007 (not modified)
IEC 60812:2006 NOTE Harmonized as EN 60812:2006 (not modified)
IEC 60947-3 NOTE Harmonized as EN 60947-3
IEC 60947-8 NOTE Harmonized as EN 60947-8
IEC 60990:2016 NOTE Harmonized as EN 60990:2016 (not modified)
IEC 61000-6-5 NOTE Harmonized as EN 61000-6-5
IEC 61032 NOTE Harmonized as EN 61032
IEC 61095:2009 NOTE Harmonized as EN 61095:2009 (not modified)
IEC 61508-2 NOTE Harmonized as EN 61508-2
IEC 61508-3 NOTE Harmonized as EN 61508-3
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010 (not modified)
IEC 61508-6:2010 NOTE Harmonized as EN 61508-6:2010 (not modified)
IEC 61649 NOTE Harmonized as EN 61649
IEC 61915-2:2011 NOTE Harmonized as EN 61915-2:2012 (not modified)
IEC 62061 NOTE Harmonized as EN 62061
IEC 62443 (series) NOTE Harmonized as EN 62443 (series)
IEC 62477-1:2012 NOTE Harmonized as EN 62477-1:2012 (not modified)
IEC 62683-1 NOTE Harmonized as EN 62683-1
ISO/IEC 80079-34 NOTE Harmonized as EN ISO/IEC 80079-34
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-1 2017 Rotating electrical machines - Part 1: - -
Rating and performance
IEC 60034-12 2016 Rotating electrical machines - Part 12: EN 60034-12 2017
Starting performance of single-speed
three-phase cage induction motors
IEC 60034-30-1 - Rotating electrical machines - Part 30-1: EN 60034-30-1 2014
Efficiency classes of line operated AC
motors (IE code)
IEC 60038 (mod) - IEC standard voltages EN 60038 2011
IEC 60068-2-14 2009 Environmental testing - Part 2-14: Tests - EN 60068-2-14 2009
Test N: Change of temperature
IEC 60079-14 - Explosive atmospheres - Part 14: Electrical EN 60079-14 2014
installations design, selection and erection
IEC 60085 2007 Electrical insulation - Thermal evaluation EN 60085 2008
and designation
IEC 60364-1 (mod) 2005 Low-voltage electrical installations - Part 1: HD 60364-1 2008
Fundamental principles, assessment of
general characteristics, definitions
- -  + A11 2017
IEC 60364-7-712 - Electrical installations of buildings -- Part 7- HD 60364-7-712 2005
712: Requirements for special installations
or locations - Solar photovoltaic (PV)
power supply systems
- -  + corrigendum 2006
IEC 60715 2017 Dimensions of low-voltage switchgear and EN 60715 2017
controlgear - Standardized mounting on
rails for mechanical support of switchgear,
controlgear and accessories
IEC 60730-1 (mod) - Automatic electrical controls - Part 1: EN 60730-1 2016
General requirements
Publication Year Title EN/HD Year
IEC 60947-1 2007 Low-voltage switchgear and controlgear - EN 60947-1 2007
Part 1: General rules
+ A1 2010  + A1 2011
+ A2 2014  + A2 2014
IEC 60947-2 2016 Low-voltage switchgear and controlgear - EN 60947-2 2017
Part 2: Circuit-breakers
+COR 1 2016
IEC 60947-5-1 2016 Low-voltage switchgear and controlgear - EN 60947-5-1 2017
Part 5-1: Control circuit devices and
switching elements - Electromechanical
control circuit devices
+COR 1 2016
- -
IEC 61000-6-2 - Electromagnetic compatibility (EMC) - Part EN 61000-6-2 2019
6-2: Generic standards - Immunity
standard for industrial environments
IEC 61051-2 1991 Varistors for use in electronic equipment - - -
Part 2: Sectional specification for surge
suppression varistors
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 61439 series Low-voltage switchgear and controlgear EN 61439 series
assemblies
IEC 61810-1 - Electromechanical elementary relays - Part EN 61810-1 2015
1: General and safety requirements
CISPR 11 (mod) 2015 Industrial, scientific and medical equipment EN 55011 2016
- Radio-frequency disturbance
characteristics - Limits and methods of
measurement
+ A1 2016  + A1 2017
ISO 2859-1 1999 Sampling procedures for inspection by - -
attributes -- Part 1: Sampling schemes
indexed by acceptance quality limit (AQL)
for lot-by-lot inspection
ISO 3864-2 2016 Graphical symbols - Safety colours and - -
safety signs – Part 2: Design principles for
product safety labels
Dated as no equivalent European Standard exists.
Annex ZZA
(informative)
Relationship between this European standard and the essential requirements
of Directive 2014/30/EU [2014 OJ L96] aimed to be covered and the
standardisation request M/552
This European standard has been prepared under the European Commission standardisation request
C(2016) 7641 final of 30.11.2016 , ('M/552'), as regards harmonised standards in support of Directive
2014/30/EU relating to electromagnetic compatibility, to provide one voluntary means of conforming to
essential requirements of Directive 2014/30/EU of the European Parliament and of the Council of 26
February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic
compatibility [2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZA.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding essential
requirements of that Directive, and associated EFTA regulations.

Table ZZA.1 – Correspondence between this European standard and the
Essential Requirements set out in Directive 2014/30/EU [2014 OJ L96]

Essential requirements of Clause(s) / sub-clause(s)
Remarks / Notes
Directive 2014/30/EU of this EN
Annex I. 1(a) (electromagnetic 2, 8.3.3, 9.4.1, 9.4.3
disturbances)
Annex I. 1(b) (electromagnetic 2, 8.3.1, 8.3.2, 9.4.1, 9.4.2
immunity)
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
COMMISSION IMPLEMENTING DECISION C(2016) 7641 final of 30.11.2016 on a standardisation request to the
European Committee for Standardisation, to the European Committee for Electrotechnical Standardisation and to the
European Telecommunications Standards Institute as regards harmonised standards in support of Directive 2014/30/EU
of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member
States relating to electromagnetic compatibility.
Annex ZZB
(informative)
Relationship between this European standard and the safety objectives of
Directive 2014/35/EU [2014 OJ L96] aimed to be covered

This European standard has been prepared under a Commission’s standardization request relating to
harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZB.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.

Table ZZB.1 – Correspondence between this European standard and Annex I of
Directive 2014/35/EU [2014 OJ L96]

Safety objectives of Clause(s) / sub-clause(s) of this EN Remarks/note
Directive 2014/35/EU
1 a) 2, 3, 5, 6, 8, Annex A, Annex B, Annex F,
Annex K, Annex M, Annex P, Annex Q
1 b) 2, 3, 5, 6, 7, 8, 9, Annex A, Annex F,
Annex G, Annex L, Annex M, Annex N,
Annex Q
1 c) 1, 2, 3, 5, 6, 7, 8,9, Annex A, Annex B,
Annex D, Annex F, Annex G, Annex H,
Annex I, Annex K, Annex L, Annex M,
Annex O, Annex P, Annex Q
2 a) 2, 3, 5, 6, 8, 9, Annex N
2 b) 2, 3, 5, 6, 8.1, 9, Annex L
2 c) 1, 2, 3, 5, 6, 7, 8, Annex F, Annex K, Annex L
2 d) 2, 3, 5, 6, 8, 9, Annex B, Annex F, Annex K,
Annex L, Annex M, Annex N, Annex P
3 a) 2, 3, 5, 6, 7, 8, 9, Annex L, Annex M
3 b) 2, 3, 5, 6, 7, 8, 9, Annex B, Annex D,
Annex G, Annex I, Annex K, Annex L,
Annex M, Annex P, Annex Q
3 c) 2, 3, 5, 6, 8, 9, Annex B, Annex D, Annex H,
Annex L, Annex P, Annex Q
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
IEC 60947-4-1 ®
Edition 4.0 2018-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
INTERNATIONALE
ICS 29.120.99, 29.130.20 ISBN 978-2-8322-5922-1

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CONTENTS
FOREWORD . 10
INTRODUCTION . 13
1 Scope . 14
2 Normative references . 15
3 Terms, definitions, symbols and abbreviated terms . 16
3.1 General . 16
3.2 Alphabetical index of terms . 16
3.3 Terms and definitions concerning contactors . 18
3.4 Terms and definitions concerning starters . 19
3.5 Terms and definitions concerning characteristic quantities . 25
3.6 Terms and definitions concerning safety aspects . 26
3.7 Symbols and abbreviated terms . 27
4 Classification . 28
5 Characteristics of contactors and starters . 28
5.1 Summary of characteristics . 28
5.2 Type of equipment . 29
5.2.1 Kind of equipment . 29
5.2.2 Number of poles . 29
5.2.3 Kind of current (AC or DC) . 29
5.2.4 Interrupting medium (air, oil, gas, vacuum, etc.) . 29
5.2.5 Operating conditions of the equipment . 29
5.3 Rated and limiting values for main circuits . 29
5.3.1 Rated voltages . 29
5.3.2 Currents or powers . 31
5.3.3 Rated frequency . 32
5.3.4 Rated duties . 32
5.3.5 Normal load and overload characteristics . 33
5.3.6 Short-circuit characteristics . 35
5.3.7 Pole impedance of a contactor (Z) . 36
5.4 Utilization category . 36
5.4.1 General . 36
5.4.2 Assignment of utilization categories based on the results of tests . 36
5.5 Control circuits . 38
5.6 Auxiliary circuits . 39
5.7 Characteristics of relay and release of overload relays and motor protective
switching device (MPSD) . 39
5.7.1 Summary of characteristics . 39
5.7.2 Types of relay or release . 39
5.7.3 Characteristic values . 39
5.7.4 Designation and current settings of overload relays . 41
5.7.5 Time-current characteristics of overload relays . 41
5.7.6 Influence of ambient air temperature. 42
5.8 Co-ordination with short-circuit protective devices . 42
5.9 Void . 42
5.10 Types and characteristics of automatic change-over devices and automatic
acceleration control devices . 42

IEC 60947-4-1:2018 © IEC 2018 – 3 –
5.10.1 Types . 42
5.10.2 Characteristics. 42
5.11 Types and characteristics of auto-transformers for two-step auto-transformer
starters . 43
5.12 Types and characteristics of starting resistors for rheostatic rotor starters . 43
6 Product information . 43
6.1 Nature of information . 43
6.1.1 Identification . 43
6.1.2 Characteristics, basic rated values and utilization . 44
6.2 Marking . 45
6.3 Instructions for installation, operation, maintenance, decommissioning and
dismantling . 46
6.4 Environmental information . 46
7 Normal service, mounting and transport conditions . 46
8 Constructional and performance requirements . 47
8.1 Constructional requirements . 47
8.1.1 General . 47
8.1.2 Materials . 47
8.1.3 Current-carrying parts and their connections . 48
8.1.4 Clearances and creepage distances . 48
8.1.5 Actuator . 48
8.1.6 Indication of the contact position . 49
8.1.7 Additional requirements for equipment suitable for isolation . 49
8.1.8 Terminals . 49
8.1.9 Additional requirements for equipment provided with a neutral pole . 49
8.1.10 Provisions for protective earthing . 49
8.1.11 Enclosures for equipment . 49
8.1.12 Degrees of protection of enclosed equipment . 50
8.1.13 Conduit pull-out, torque and bending with metallic conduits . 50
8.1.14 Limited energy source . 50
8.1.15 Stored charge energy circuit . 52
8.1.16 Fault and abnormal conditions . 52
8.1.17 Short-circuit and overload protection of ports . 53
8.2 Performance requirements . 53
8.2.1 Operating conditions . 53
8.2.2 Temperature-rise . 59
8.2.3 Dielectric properties . 61
8.2.4 Normal load and overload performance requirements . 62
8.2.5 Co-ordination with short-circuit protective devices . 68
8.3 Electromagnetic compatibility (EMC) . 71
8.3.1 General . 71
8.3.2 Immunity . 71
8.3.3 Emission . 72
9 Tests . 72
9.1 Kinds of test . 72
9.1.1 General . 72
9.1.2 Type tests . 73
9.1.3 Routine tests . 73

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9.1.4 Sampling tests . 73
9.1.5 Special tests . 74
9.2 Compliance with constructional requirements . 75
9.2.1 General . 75
9.2.2 Electrical performance of screwless-type clamping units . 75
9.2.3 Ageing test for screwless-type clamping units . 75
9.2.4 Limited energy source test . 76
9.2.5 Breakdown of components . 76
9.3 Compliance with performance requirements . 77
9.3.1 Test sequences . 77
9.3.2 General test conditions . 78
9.3.3 Performance under no load, normal load and overload conditions . 78
9.3.4 Performance under short-circuit conditions . 90
9.3.5 Overload current withstand capability of contactors . 95
9.3.6 Routine tests and sampling tests . 95
9.4 EMC tests . 97
9.4.1 General . 97
9.4.2 Immunity . 97
9.4.3 Emission . 99
Annex A (normative) Marking and identification of terminals of contactors, starters and
associated overload relays . 101
A.1 General . 101
A.2 Marking and identification of terminals of main circuits . 101
A.3 Marking and identification of terminals of overload relays . 101
Annex B (normative) Special tests . 103
B.1 General . 103
B.2 Mechanical durability . 103
B.2.1 General . 103
B.2.2 Verification of mechanical durability . 103
B.3 Electrical durability . 105
B.3.1 General . 105
B.3.2 Results to be obtained . 106
B.3.3 Statistical analysis of test results for contactors or starters . 106
B.4 Coordination at the crossover current between the starter and associated
SCPD . 107
B.4.1 General and definitions . 107
B.4.2 Condition for the test for the verification of co-ordination at the
crossover current by a direct method . 108
B.4.3 Test currents and test circuits . 108
B.4.4 Test procedure and results to be obtained . 108
B.4.5 Verification of co-ordination at the crossover current by an indirect
method . 108
Annex C (informative) Typical characteristics of starters . 111
Annex D (informative) Items subject to agreement between manufacturer and user . 118
Annex E (Void) . 119
Annex F (normative) Requirements for auxiliary contact linked with power contact
(mirror contact) . 120
F.1 Application and object . 120
F.1.1 Application . 120

IEC 60947-4-1:2018 © IEC 2018 – 5 –
F.1.2 Object . 120
F.2 Terms and definitions . 120
F.3 Characteristics . 120
F.4 Product information . 120
F.5 Normal service, mounting and transport conditions . 121
F.6 Constructional and performance requirements . 121
F.7 Tests . 121
F.7.1 General . 121
F.7.2 Tests on products in a new condition . 121
F.7.3 Test after conventional operational performance (defined under Table
13) . 122
Annex G (informative) Rated operational currents and rated operational powers of
switching devices for electrical motors . 123
G.1 General . 123
G.2 Rated operational powers and rated operational currents . 123
Annex H (normative) Extended functions to electronic overload relays . 127
H.1 General . 127
H.2 Terms and definitions . 127
H.3 Limits of operation of control functions . 127
H.3.1 General . 127
H.3.2 Limits of electronic overload relay with main circuit under-voltage
restarting function . 127
H.4 Test of the control functions . 128
Annex I (informative) AC-1 contactors for use with semiconductor controlled motor
load . 129
Annex J (Void) . 130
Annex K (normative) Procedure to determine data for electromechanical contactors
used in functional safety applications . 131
K.1 General . 131
K.2 Test requirements . 131
K.3 Characterization of a failure mode . 131
K.4 Failure ratios of a contactor . 131
Annex L (normative) Assessment procedure for electromechanical overload protection
used in safety applications and especially in explosive atmospheres . 133
L.1 Application and object . 133
L.1.1 Application . 133
L.1.2 Object . 133
L.2 Terms, definitions and symbols . 133
L.2.1 Terms and definitions . 133
L.2.2 Symbols and abbreviations . 134
L.3 Procedure . 135
L.3.1 General . 135
L.3.2 Safety design process . 135
L.4 Requirements . 136
L.4.1 General . 136
L.4.2 Safety plan . 136
L.4.3 Design . 137
L.4.4 Failure mode and effects analysis of the safety function . 137
L.4.5 Design plan . 138

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L.4.6 Verification . 138
L.4.7 Function assessed . 138
L.5 Documentation . 138
L.5.1 Technical safety documentation . 138
L.5.2 Safety instructions . 138
L.6 Example. 139
L.6.1 architecture description . 139
L.6.2 FMEA . 140
Annex M (normative) DC contactors for use in photovoltaic (PV) applications . 148
M.1 Application . 148
M.2 Object . 148
M.3 Terms and definitions . 148
M.4 Classification . 149
M.5 Characteristics . 149
M.5.1 General . 149
M.5.2 Rated impulse withstand voltage. 149
M.5.3 Utilization category . 149
M.6 Product information . 150
M.7 Normal service, mounting and transport conditions . 150
M.7.1 General . 150
M.7.2 Ambient air temperature . 150
M.7.3 Altitude . 150
M.8 Constructional and performance requirements . 151
M.8.1 Constructional requirements . 151
M.8.2 Performance requirements . 151
M.8.3 Electromagnetic compatibility (EMC) . 152
M.9 Tests . 152
M.9.1 General . 152
M.9.2 Type tests . 152
M.9.3 Making and breaking capacities and conventional operational
performance . 153
M.9.4 Thermal cycling test . 153
M.9.5 Climatic test. 153
M.9.6 Dielectric test . 153
M.9.7 Critical load current test . 154
M.9.8 Mechanical properties . 155
M.9.9 Degree of protection of enclosed contactors . 156
M.9.10 EMC . 156
M.9.11 Clearance and creepage distances . 156
Annex N (normative) Additional requirements and tests for equipment with protective
separation . 157
N.1 General . 157
N.2 Definitions. 157
N.3 Requirements . 157
N.3.1 Test method for implementing protective impedance . 157
N.3.2 Touch current measurement . 158
Annex O (informative) Load monitoring indicators . 160
O.1 General . 160
O.2 Indicators list . 160
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