EN IEC 60947-4-1:2025
(Main)Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
IEC 60947-4-1:2023 is applicable to the following equipment: - electromechanical contactors and starters including motor protective switching devices (MPSD and IMPSD); - actuators of contactor relays; - contacts dedicated exclusively to the coil circuit of the contactor or the 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 fifth edition cancels and replaces the fourth edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) objective in the scope; b) instantaneous only motor protective switching device IMPSD (3.5.33); c) kinds of equipment (5.2.1); d) methods of overload protection of motors (5.2.6); e) adoption of the AC-7d from IEC 61095:2023 (in 5.4.2); f) separately mounted overload relay of a starter (in 5.7.3 b)); g) starter and contactor suitable for use downstream to basic drive module (6.1.2 w)); h) reference to IEC TS 63058 for environmental aspects (in 6.4); i) wiring subject to movement (in 8.1.3); j) use of voltage transient limiting device (8.1.18); k) accessible parts subject to temperature limits (in 8.2.2.3); l) reference to Annex X of IEC 60947-1:2020 for the co-ordination of MPSD with SCPD (8.2.5.4); m) reference to IEC TR 63216 with different EMC environments (8.3.1); n) reference to IEC TR 63201 for the embedded software design (8.4); o) reference to IEC TS 63208 for cybersecurity aspects (8.5); p) update and completion of the measurement method of the power consumption of the electromagnet (9.3.3.2.1.2); q) update of Annex C including rational about AC-3e; r) determination of the critical load current for photovoltaic applications (M.8.7).
Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische Schütze und Motorstarter
Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs – Contacteurs et démarreurs électromécaniques
L'IEC 60947-4-1:2023 s'applique aux équipements suivants: - contacteurs électromécaniques et démarreurs, y compris les appareils de connexion de protection des moteurs (ACPM et ACPIM); - organes de commande de contacteurs auxiliaires; - contacts destinés exclusivement au circuit de la bobine du contacteur ou du 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 cinquième édition annule et remplace la quatrième édition parue en 2018. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) objet du domaine d'application; b) appareil de connexion de protection uniquement instantanée des moteurs (ACPIM) (3.5.33); c) nature du matériel (5.2.1); d) méthodes de protection des moteurs contre les surcharges (5.2.6); e) adoption de la catégorie AC-7d de l'IEC 61095:2023 (en 5.4.2); f) relais de surcharge monté séparément d'un démarreur (en 5.7.3 b)); g) démarreur et contacteur adaptés à une utilisation en aval d'un module d'entraînement principal (6.1.2 w)); h) référence à l'IEC TS 63058 pour les aspects relatifs à l'environnement (en 6.4); i) câblage soumis à un mouvement (en 8.1.3); j) utilisation d'un dispositif de limitation des transitoires de tension (8.1.18); k) parties accessibles soumises à des limites de température (en 8.2.2.3); l) référence à l'Annexe X de l'IEC 60947-1:2020 pour la coordination entre ACPM et DPCC (8.2.5.4); m) référence à l'IEC TR 63216 avec différents environnements de CEM (8.3.1); n) référence à l'IEC TR 63201 pour la conception des logiciels intégrés (8.4); o) référence à l'IEC TS 63208 pour les aspects relatifs à la cybersécurité (8.5); p) mise à jour et complément de la méthode de mesure de la consommation de puissance de l'électroaimant (9.3.3.2.1.2); q) mise à jour de l'Annexe C, y compris justification de la catégorie AC-3e; r) détermination du courant critique de charge pour les applications photovoltaïques (M.8.7). La version française de cette norme n'a pas été soumise au vote.
Nizkonapetostne stikalne in krmilne naprave - 4-1. del: Kontaktorji in motorski zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-1:2023)
Ta del standarda IEC 60947 se uporablja za naslednjo opremo:
– elektromehanske kontaktorje in zaganjalnike, vključno z motorsko zaščitno stikalno napravo (MPSD in IMPSD);
– sprožilnike kontaktorskih relejev;
– kontakte, ki so namenjeni izključno tokokrogu tuljave kontaktorja ali kontaktorskega releja;
– namenski pribor (npr. namensko ožičenje, namenski zapah);
namenjeno za priključitev v razdelilne tokokroge, motorna vezja in druge obremenitvene tokokroge, katerih nazivna napetost ne presega 1000 V AC oziroma 1500 V DC.
Ta dokument se ne uporablja za:
– zaganjalnike za motorje na enosmerni tok;
– pomožne kontakte kontaktorjev in kontakte kontaktorskih relejev. Ti so zajeti v standardu IEC 60947-5-1;
– 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;
– funkcijo zaščite motorja pred preobremenitvijo, ki jo izvajajo krmilne enote za vgrajeno toplotno zaščito (PTC). Te so zajete v standardu IEC 60947-8;
– uporabo opreme z uvedbo dodatnih ukrepov v eksplozivnih okoljih. Ti so podani v skupini standardov IEC 60079.
Namen tega dokumenta je navesti:
• značilnosti in sestavo opreme (točka 5);
• pogoje, ki veljajo za opremo in se navezujejo na:
– njeno delovanje (5.2.5) in zaščitne funkcije (5.2.6, 5.7, 5.8);
– njena predvidena okolja (6.5, 8.3.1) in uporabo (5.4, dodatek C, dodatek D, dodatek G, dodatek H, dodatek I, dodatek M, dodatek O), vključno z varnostno uporabo (dodatek F, dodatek K, dodatek L);
– njeno konstrukcijo in delovanje (točka 8), vključno z zahtevami za zmanjšanje tveganja električnega udara, toplotne nevarnosti, energetske nevarnosti, nevarnosti požara in mehanske nevarnosti, razumno predvidljive zlorabe, težav z elektromagnetno združljivostjo (EMC), napak programske opreme in varnostnih težav;
• preskuse, s katerimi se potrjuje izpolnjevanje teh pogojev, in metode, ki jih je treba uporabiti za te preskuse (točka 9);
• informacije, ki jih je treba vključiti v opremo ali v dokumentacijo izdelka (točka 6).
General Information
Relations
Overview - EN IEC 60947-4-1:2025 (Low-voltage switchgear | Contactors & Motor-starters)
EN IEC 60947-4-1:2025 is the fifth-edition European adoption of IEC 60947-4-1:2023. It defines requirements, tests and product information for electromechanical contactors and motor-starters, including motor protective switching devices (MPSD and IMPSD), actuators, coil‑circuit contacts and dedicated accessories for low‑voltage distribution and motor circuits (rated voltages up to 1 000 V AC or 1 500 V DC). This edition replaces the 2018/2020/2021 versions and constitutes a technical revision aligned with modern design, testing, EMC, environmental and cybersecurity considerations.
Key topics and technical requirements
- Scope and equipment types: Electromechanical contactors, starters, separately mounted overload relays, IMPSD (instantaneous-only motor protective switching device), actuators and dedicated accessories intended for low‑voltage applications.
- Rated values and duties: Specified rated voltages, currents, frequency, utilization categories and short‑circuit characteristics for reliable motor switching and protection.
- Overload protection methods: Updated methods for motor overload protection and coordination with short‑circuit protective devices (SCPD).
- Utilization categories: Adoption of new categories including AC‑7d (per IEC 61095:2023) for specific switching duties.
- EMC and electromagnetic considerations: References to IEC TR 63216 for EMC environments and requirements for wiring subject to movement and transient limiting devices.
- Environmental & lifecycle information: Reference to IEC TS 63058 for environmental aspects; instructions for installation, maintenance, decommissioning and reuse/repair.
- Software and cybersecurity: Guidance and references for embedded software design (IEC TR 63201) and cybersecurity aspects (IEC TS 63208).
- Measurement & testing updates: Revised measurement method for electromagnet power consumption and updated annexes (e.g., AC‑3e rationale, PV critical load current determination).
Practical applications and users
This standard is essential for:
- Manufacturers of low‑voltage switchgear, electromechanical contactors and motor‑starters - for design, type testing and declaration of conformity.
- Panel builders and OEMs specifying contactors and starters for industrial machinery, HVAC, pumps and motor drives.
- Electrical engineers and specifiers evaluating overload protection, coordination with SCPDs and utilization categories for motor control.
- Test laboratories and certification bodies performing compliance testing, EMC assessment and power‑consumption measurements.
- Renewable energy and PV system designers using the standard’s guidance for critical load current and DC switching considerations.
Related standards
- EN IEC 60947‑1:2021 (General rules)
- IEC 61095 / EN IEC 61095 (AC‑7d adoption)
- IEC TR 63216 (EMC assessment)
- IEC TR 63201 (Embedded software)
- IEC TS 63058 (Environmental aspects)
- IEC 60947 series (other parts on circuit‑breakers, assemblies, etc.)
Keywords: EN IEC 60947-4-1:2025, low-voltage switchgear, contactors, motor-starters, electromechanical contactors, MPSD, IMPSD, overload protection, EMC, cybersecurity.
Frequently Asked Questions
EN IEC 60947-4-1:2025 is a standard published by CLC. Its full title is "Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters". This standard covers: IEC 60947-4-1:2023 is applicable to the following equipment: - electromechanical contactors and starters including motor protective switching devices (MPSD and IMPSD); - actuators of contactor relays; - contacts dedicated exclusively to the coil circuit of the contactor or the 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 fifth edition cancels and replaces the fourth edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) objective in the scope; b) instantaneous only motor protective switching device IMPSD (3.5.33); c) kinds of equipment (5.2.1); d) methods of overload protection of motors (5.2.6); e) adoption of the AC-7d from IEC 61095:2023 (in 5.4.2); f) separately mounted overload relay of a starter (in 5.7.3 b)); g) starter and contactor suitable for use downstream to basic drive module (6.1.2 w)); h) reference to IEC TS 63058 for environmental aspects (in 6.4); i) wiring subject to movement (in 8.1.3); j) use of voltage transient limiting device (8.1.18); k) accessible parts subject to temperature limits (in 8.2.2.3); l) reference to Annex X of IEC 60947-1:2020 for the co-ordination of MPSD with SCPD (8.2.5.4); m) reference to IEC TR 63216 with different EMC environments (8.3.1); n) reference to IEC TR 63201 for the embedded software design (8.4); o) reference to IEC TS 63208 for cybersecurity aspects (8.5); p) update and completion of the measurement method of the power consumption of the electromagnet (9.3.3.2.1.2); q) update of Annex C including rational about AC-3e; r) determination of the critical load current for photovoltaic applications (M.8.7).
IEC 60947-4-1:2023 is applicable to the following equipment: - electromechanical contactors and starters including motor protective switching devices (MPSD and IMPSD); - actuators of contactor relays; - contacts dedicated exclusively to the coil circuit of the contactor or the 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 fifth edition cancels and replaces the fourth edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) objective in the scope; b) instantaneous only motor protective switching device IMPSD (3.5.33); c) kinds of equipment (5.2.1); d) methods of overload protection of motors (5.2.6); e) adoption of the AC-7d from IEC 61095:2023 (in 5.4.2); f) separately mounted overload relay of a starter (in 5.7.3 b)); g) starter and contactor suitable for use downstream to basic drive module (6.1.2 w)); h) reference to IEC TS 63058 for environmental aspects (in 6.4); i) wiring subject to movement (in 8.1.3); j) use of voltage transient limiting device (8.1.18); k) accessible parts subject to temperature limits (in 8.2.2.3); l) reference to Annex X of IEC 60947-1:2020 for the co-ordination of MPSD with SCPD (8.2.5.4); m) reference to IEC TR 63216 with different EMC environments (8.3.1); n) reference to IEC TR 63201 for the embedded software design (8.4); o) reference to IEC TS 63208 for cybersecurity aspects (8.5); p) update and completion of the measurement method of the power consumption of the electromagnet (9.3.3.2.1.2); q) update of Annex C including rational about AC-3e; r) determination of the critical load current for photovoltaic applications (M.8.7).
EN IEC 60947-4-1:2025 is classified under the following ICS (International Classification for Standards) categories: 29.120.99 - Other electrical accessories; 29.130.20 - Low voltage switchgear and controlgear. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 60947-4-1:2025 has the following relationships with other standards: It is inter standard links to EN IEC 60947-4-1:2019/AC:2021-04, EN IEC 60947-4-1:2019/AC:2020-05, EN IEC 60947-4-1:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 60947-4-1:2025 is associated with the following European legislation: EU Directives/Regulations: 2014/30/EU, 2014/35/EU; Standardization Mandates: M/511, M/552. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase EN IEC 60947-4-1:2025 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Nadomešča:
SIST EN IEC 60947-4-1:2019
SIST EN IEC 60947-4-1:2019/AC:2020
SIST EN IEC 60947-4-1:2019/AC:2021
Nizkonapetostne stikalne in krmilne naprave - 4-1. del: Kontaktorji in motorski
zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-
1:2023)
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters (IEC 60947-4-1:2023)
Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische
Schütze und Motorstarter (IEC 60947-4-1:2023)
Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs
Contacteurs et démarreurs électromécaniques (IEC 60947-4-1:2023)
Ta slovenski standard je istoveten z: EN IEC 60947-4-1:2025
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 September 2025
ICS 29.120.99; 29.130.20 Supersedes EN IEC 60947-4-1:2019; EN IEC 60947-4-
1:2019/AC:2020-05; EN IEC 60947-4-1:2019/AC:2021-04
English Version
Low-voltage switchgear and controlgear - Part 4-1: Contactors
and motor-starters - Electromechanical contactors and motor-
starters
(IEC 60947-4-1:2023)
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 60947-4-1:2023) (IEC 60947-4-1:2023)
This European Standard was approved by CENELEC on 2023-12-13. 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, 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60947-4-1:2025 E
European foreword
The text of document 121A/571/FDIS, future edition 5 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) 2026-09-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-09-30
document have to be withdrawn
This document supersedes EN IEC 60947-4-1:2019 and all of its amendments and corrigenda (if any).
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 is read in conjunction with EN IEC 60947-1:2021.
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 60947-4-1:2023 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 standard indicated:
IEC 60068-2-2:2007 NOTE Approved as EN 60068-2-2:2007 (not modified)
IEC 60072-1:2022 NOTE Approved as EN IEC 60072-1:2022 (not modified)
IEC 60079 series NOTE Approved as EN IEC 60079 series
IEC 60079-7 NOTE Approved as EN 60079-7
IEC 60079-29-3:2014 NOTE Approved as EN 60079-29-3:2014 (not modified)
IEC 60204-1 NOTE Approved as EN 60204-1
IEC 60269-1:2006 NOTE Approved as EN 60269-1:2007 (not modified)
IEC 60269-2:2013 NOTE Approved as HD 60269-2:2013
IEC 60384-17:2019 NOTE Approved as EN IEC 60384-17:2019 (not modified)
IEC 60664-1:2020 NOTE Approved as EN IEC 60664-1:2020 (not modified)
IEC 60721-3-3 NOTE Approved as EN IEC 60721-3-3
IEC 60812:2018 NOTE Approved as EN IEC 60812:2018 (not modified)
IEC 60947-3:2020 NOTE Approved as EN IEC 60947-3:2021 (not modified)
IEC 60947-4-2 NOTE Approved as EN IEC 60947-4-2
IEC 60947-6-2 NOTE Approved as EN IEC 60947-6-2
IEC 60947-8 NOTE Approved as EN IEC 60947-8
IEC 60990:2016 NOTE Approved as EN 60990:2016 (not modified)
IEC 61000-6-5 NOTE Approved as EN 61000-6-5
IEC 61032 NOTE Approved as EN 61032
IEC 61508-2 NOTE Approved as EN 61508-2
IEC 61508-3 NOTE Approved as EN 61508-3
IEC 61508-4:2010 NOTE Approved as EN 61508-4:2010 (not modified)
IEC 61508-6:2010 NOTE Approved as EN 61508-6:2010 (not modified)
IEC 61557-12:2018 NOTE Approved as EN IEC 61557-12:2022 (not modified)
IEC 61557-12:2018/A1:2021 NOTE Approved as EN IEC 61557-12:2022/A1:2022 (not modified)
IEC 61649 NOTE Approved as EN 61649
IEC 61915-2:2011 NOTE Approved as EN 61915-2:2012 (not modified)
IEC 62061 NOTE Approved as EN IEC 62061
IEC 62443 series NOTE Approved as EN IEC 62443 series
IEC 62477-1:2022 NOTE Approved as EN IEC 62477-1:2023 (not modified)
IEC 62683-1 NOTE Approved as EN 62683-1
IEC 63365 NOTE Approved as EN IEC 63365
IEC 63404 NOTE Approved as EN IEC 63404
ISO/IEC 80079-34 NOTE Approved 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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-1 2022 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 2014 Rotating electrical machines - Part 30-1: EN 60034-30-1 2014
Efficiency classes of line operated AC
motors (IE code)
IEC 60068-2-14 2023 Environmental testing - Part 2-14: Tests - EN IEC 60068-2-14 2023
Test N: Change of temperature
IEC 60079-14 - Explosive atmospheres - Part 14: Electrical EN IEC 60079-14 -
installation design, selection and
installation of equipment, including initial
inspection
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 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 - Automatic electrical controls - Part 1: EN IEC 60730-1 -
General requirements
IEC 60947-1 2020 Low-voltage switchgear and controlgear - EN IEC 60947-1 2021
Part 1: General rules
IEC 60947-2 2016 Low-voltage switchgear and controlgear - EN 60947-2 2017
Part 2: Circuit-breakers
Publication Year Title EN/HD Year
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
IEC 61051-2 - Varistors for use in electronic equipment - EN IEC 61051-2 -
Part 2: Sectional specification for surge
suppression varistors
IEC 61095 2023 Electromechanical contactors for EN IEC 61095 2025
household and similar purposes
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 IEC 61439 series
assemblies
IEC 61643-331 - Components for low-voltage surge EN IEC 61643-331 -
protection - Part 331: Performance
requirements and test methods for metal
oxide varistors (MOV)
IEC 61800-5-1 2022 Adjustable speed electrical power drive EN IEC 61800-5-1 2023
systems - Part 5-1: Safety requirements -
Electrical, thermal and energy
IEC 61810-1 - Electromechanical elementary relays - Part EN 61810-1 -
1: General and safety requirements
IEC/TS 63058 - Switchgear and controlgear and their - -
assemblies for low voltage - Environmental
aspects
IEC/TS 63208 - Low-voltage switchgear and controlgear - - -
Security aspects
IEC/TR 63216 2019 Low-voltage switchgear and controlgear - CLC IEC/TR 63216 2020
Electromagnetic compatibility assessment
for switchgear and controlgear and their
assemblies
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
- - + A11 2020
+ A2 2019 + A2 2021
ISO 2859-1 - Sampling procedures for inspection by - -
attributes - Part 1: Sampling schemes
indexed by acceptance quality limit (AQL)
for lot-by-lot inspection
ISO 3864-2 - Graphical symbols - Safety colours and - -
safety signs - Part 2: Design principles for
product safety labels
IEC 60947-4-1 ®
Edition 5.0 2023-11
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 978-2-8322-7773-7
– 2 – IEC 60947-4-1:2023 © IEC 2023
CONTENTS
FOREWORD . 10
1 Scope . 13
2 Normative references . 14
3 Terms, definitions, symbols and abbreviated terms . 15
3.1 General . 15
3.2 Alphabetical index of terms . 15
3.3 Terms and definitions concerning contactors . 18
3.4 Terms and definitions of the functions of starters . 19
3.5 Terms and definitions concerning starters . 20
3.6 Terms and definitions concerning characteristic quantities . 26
3.7 Terms and definitions concerning safety aspects . 28
3.8 Terms and definitions concerning electric motor characteristics . 31
3.9 Symbols and abbreviated terms . 31
4 Classification . 32
5 Characteristics of contactors and starters . 33
5.1 Summary of characteristics . 33
5.2 Type of equipment . 33
5.2.1 Kind of equipment . 33
5.2.2 Number of poles . 34
5.2.3 Kind of current (AC or DC) . 34
5.2.4 Interrupting medium (air, oil, gas, vacuum, etc.) . 34
5.2.5 Operating conditions of the equipment . 34
5.2.6 Methods of overload protection of motors . 34
5.3 Rated and limiting values for main circuits . 35
5.3.1 Rated voltages . 35
5.3.2 Currents or powers . 36
5.3.3 Rated frequency . 38
5.3.4 Rated duties . 38
5.3.5 Normal load and overload characteristics . 39
5.3.6 Short-circuit characteristics . 41
5.3.7 Pole impedance of a contactor (Z) or starter . 41
5.4 Utilization category . 41
5.4.1 General . 41
5.4.2 Assignment of utilization categories based on the results of tests . 42
5.5 Control circuits . 43
5.6 Auxiliary circuits . 44
5.7 Characteristics of relay and release of overload relays and of motor
protective switching device (MPSD) . 44
5.7.1 Summary of characteristics . 44
5.7.2 Types of relay or release . 44
5.7.3 Characteristic values . 45
5.7.4 Designation and current settings of overload relays . 46
5.7.5 Time-current characteristics of overload relays . 47
5.7.6 Influence of ambient air temperature. 47
5.8 Co-ordination with short-circuit protective devices . 47
5.9 Void . 47
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5.10 Types and characteristics of automatic change-over devices and automatic
acceleration control devices . 47
5.10.1 Types . 47
5.10.2 Characteristics. 47
5.11 Types and characteristics of auto-transformers for two-step auto-transformer
starters . 48
5.12 Types and characteristics of starting resistors for rheostatic rotor starters . 48
6 Product information . 49
6.1 Nature of information . 49
6.1.1 Identification . 49
6.1.2 Characteristics, basic rated values and utilization . 49
6.2 Marking . 51
6.3 Instructions for installation, operation, maintenance, decommissioning and
dismantling . 52
6.4 Environmental information . 52
6.5 Instruction for equipment capable to be reused, repaired and upgraded . 53
7 Normal service, mounting and transport conditions . 53
8 Constructional and performance requirements . 53
8.1 Constructional requirements . 53
8.1.1 General . 53
8.1.2 Materials . 54
8.1.3 Current-carrying parts and their connections . 54
8.1.4 Clearances and creepage distances . 54
8.1.5 Actuator . 55
8.1.6 Indication of the contact position . 55
8.1.7 Additional requirements for equipment suitable for isolation . 55
8.1.8 Terminals . 56
8.1.9 Additional requirements for equipment provided with a neutral pole . 56
8.1.10 Provisions for protective earthing . 56
8.1.11 Enclosures for equipment . 56
8.1.12 Degrees of protection of enclosed equipment . 56
8.1.13 Conduit pull-out, torque and bending with metallic conduits . 56
8.1.14 Limited energy source . 57
8.1.15 Stored charge energy circuit . 59
8.1.16 Fault and abnormal conditions . 59
8.1.17 Short-circuit and overload protection of ports . 60
8.1.18 Use of voltage transient limiting device . 60
8.2 Performance requirements . 60
8.2.1 Operating conditions . 60
8.2.2 Temperature-rise . 66
8.2.3 Dielectric properties . 69
8.2.4 Normal load and overload performance requirements . 70
8.2.5 Co-ordination with short-circuit protective devices . 75
8.3 Electromagnetic compatibility (EMC) . 77
8.3.1 General . 77
8.3.2 Immunity . 78
8.3.3 Emission . 78
8.4 Embedded software . 79
8.5 Security . 79
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9 Tests . 79
9.1 Kinds of test . 79
9.1.1 General . 79
9.1.2 Type tests . 79
9.1.3 Routine tests . 79
9.1.4 Sampling tests . 80
9.1.5 Special tests . 80
9.2 Compliance with constructional requirements . 81
9.2.1 General . 81
9.2.2 Electrical performance of screwless-type clamping units . 81
9.2.3 Ageing test for screwless-type clamping units . 82
9.2.4 Limited energy source test . 82
9.2.5 Breakdown of components . 83
9.2.6 Wire flexing test . 83
9.3 Compliance with performance requirements . 84
9.3.1 Test sequences . 84
9.3.2 General test conditions . 84
9.3.3 Performance under no load, normal load and overload conditions . 85
9.3.4 Performance under short-circuit conditions . 98
9.3.5 Overload current withstand capability of contactors and IMPSDs . 104
9.3.6 Routine tests and sampling tests . 104
9.4 EMC tests . 106
9.4.1 General . 106
9.4.2 Immunity . 106
9.4.3 Emission . 108
Annex A (normative) Marking and identification of terminals of contactors, starters and
associated overload relays . 110
A.1 General . 110
A.2 Marking and identification of terminals of main circuits . 110
A.3 Marking and identification of terminals of overload relays . 110
Annex B (normative) Special tests . 112
B.1 General . 112
B.2 Mechanical durability . 112
B.2.1 General . 112
B.2.2 Verification of mechanical durability . 112
B.3 Electrical durability . 114
B.3.1 General . 114
B.3.2 Results to be obtained . 115
B.3.3 Statistical analysis of test results for contactors or starters . 115
B.4 Co-ordination at the crossover current between the starter and associated
SCPD . 116
B.4.1 General . 116
B.4.2 Condition for the test for the verification of co-ordination at the
crossover current by a direct method . 116
B.4.3 Test currents and test circuits . 116
B.4.4 Test procedure and results to be obtained . 117
B.4.5 Verification of co-ordination at the crossover current by an indirect
method . 117
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Annex C (informative) Electric motor evolutions and motor starting methods . 120
C.1 General . 120
C.1.1 Major changes on the market concerning electrical motors . 120
C.1.2 Electric motor characteristics . 121
C.1.3 Efficiency motor analysis . 121
C.1.4 Impacts on switchgear and controlgear . 123
C.2 Typical variants direct-on-line starters. 123
C.3 Functional aspects of motor starters . 126
C.4 Currents and torques during a star-delta start . 128
C.5 Currents and torques during an auto-transformer start . 131
C.6 Currents waveform of the different modes of operation of a starter . 133
Annex D (informative) Items subject to agreement between manufacturer and user . 135
Annex E (Void) . 136
Annex F (normative) Requirements for auxiliary contact linked with power contact
(mirror contact) . 137
F.1 Application and object . 137
F.1.1 Application . 137
F.1.2 Object . 137
F.2 Characteristics . 137
F.3 Product information . 137
F.4 Normal service, mounting and transport conditions . 138
F.5 Constructional and performance requirements . 138
F.6 Tests . 138
F.6.1 General . 138
F.6.2 Tests on products in a new condition . 138
F.6.3 Test after conventional operational performance (defined under
Table 10) . 139
Annex G (informative) Rated operational currents and rated operational powers of
switching devices for electrical motors . 140
G.1 General . 140
G.2 Rated operational powers and rated operational currents . 140
Annex H (normative) Extended functions to electronic overload relays . 144
H.1 General . 144
H.2 Limits of operation of control functions . 144
H.2.1 General . 144
H.2.2 Limits of electronic overload relay with main circuit undervoltage
restarting function . 144
H.3 Test of the control functions . 144
Annex I (informative) AC-1 contactors for use with semiconductor controlled motor
load 145
Annex J (Void) . 146
Annex K (normative) Procedure to determine data for electromechanical contactors
used in functional safety applications . 147
K.1 General . 147
K.2 Test requirements . 147
K.3 Characterization of a failure mode . 147
K.4 Failure ratios of a contactor . 147
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Annex L (normative) Assessment procedure for electromechanical overload protection
used in safety applications and especially in explosive atmospheres . 149
L.1 Application and object . 149
L.1.1 Application . 149
L.1.2 Object . 149
L.2 Procedure . 149
L.2.1 General . 149
L.2.2 Safety design process . 150
L.3 Requirements . 150
L.3.1 General . 150
L.3.2 Safety plan . 150
L.3.3 Design . 151
L.3.4 Failure mode and effects analysis of the safety function . 151
L.3.5 Design plan . 152
L.3.6 Verification . 152
L.3.7 Function assessed . 152
L.4 Documentation . 152
L.4.1 Technical safety documentation . 152
L.4.2 Safety instructions . 152
L.5 Example. 153
L.5.1 architecture description . 153
L.5.2 FMEA . 154
Annex M (normative) DC contactors for use in photovoltaic (PV) applications . 162
M.1 Application . 162
M.2 Object . 162
M.3 Classification . 162
M.4 Characteristics . 162
M.4.1 General . 162
M.4.2 Rated impulse withstand voltage. 162
M.4.3 Utilization category . 163
M.5 Product information . 163
M.6 Normal service, mounting and transport conditions . 164
M.6.1 General . 164
M.6.2 Ambient air temperature . 164
M.6.3 Altitude . 164
M.7 Constructional and performance requirements . 164
M.7.1 Constructional requirements . 164
M.7.2 Performance requirements . 164
M.7.3 Electromagnetic compatibility (EMC) . 165
M.8 Tests . 166
M.8.1 General . 166
M.8.2 Type tests . 166
M.8.3 Making and breaking capacities and conventional operational
performance . 166
M.8.4 Thermal cycling test . 166
M.8.5 Climatic test. 167
M.8.6 Dielectric test . 167
M.8.7 Critical load current test . 167
M.8.8 Mechanical and electrical properties of terminals . 168
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M.8.9 Degree of protection of enclosed contactors . 168
M.8.10 EMC . 168
M.8.11 Clearance and creepage distances . 168
Annex N (normative) Additional requirements and tests for equipment with protective
separation . 169
N.1 General . 169
N.2 Terms and definitions . 169
N.3 Requirements . 169
N.3.1 Test method for implementing protective impedance . 169
N.3.2 Touch current measurement . 170
Annex O (normative) Load monitoring indicators . 172
O.1 General . 172
O.2 Indicators list . 172
O.3 Uncertainty . 174
O.4 Tests . 175
O.4.1 Routine tests . 175
O.4.2 Type tests . 175
Annex P (normative) Short-circuit breaking tests of MPSD . 177
P.1 General test conditions . 177
P.2 Rated service short-circuit breaking capacity . 178
P.2.1 General . 178
P.2.2 Test of rated service short-circuit breaking capacity. 178
P.2.3 Verification of operational performance capability . 178
P.2.4 Verification of dielectric withstand . 178
P.2.5 Verification of temperature-rise . 179
P.2.6 Verification of overload releases . 179
P.3 Rated ultimate short-circuit breaking capacity . 179
P.3.1 General . 179
P.3.2 Verification of overload releases . 179
P.3.3 Test of rated ultimate short-circuit breaking capacity . 180
P.3.4 Verification of dielectric withstand . 180
P.3.5 Verification of overload releases . 180
P.4 Test of MPSD for IT system . 180
P.4.1 General . 180
P.4.2 Individual pole short-circuit . 181
P.4.3 Verification of dielectric withstand . 181
P.4.4 Verification of overload releases . 181
P.4.5 Marking . 182
Bibliography .
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Die Norm EN IEC 60947-4-1:2025 ist ein wesentlicher Bestandteil der Regelungen für Niederspannungsschaltgeräte und Steuerungen, insbesondere in Bezug auf elektromagnetische Kontaktoren und Motorstarter. Der Geltungsbereich dieser Norm ist klar definiert und umfasst elektromagnetische Kontaktoren sowie Starter, einschließlich motorprotectiver Schaltgeräte (MPSD und IMPSD) und der zugehörigen Aktuatoren und Kontakte, die speziell für die Spule des Kontaktors oder des Kontaktorelais vorgesehen sind. Die Norm gilt für Anwendungen in Verteilungs-, Motor- und anderen Lastschaltungen mit einer Nennspannung von maximal 1.000 V AC oder 1.500 V DC. Eine der stärksten Eigenschaften dieser Norm ist die umfassende technische Überarbeitung, die sie in ihrer fünften Auflage erfahren hat. Signifikante Änderungen gegenüber der Vorgängerversion, die 2018 veröffentlicht wurde, führen zu präziseren Vorgaben in verschiedenen Bereichen. Dazu gehören beispielsweise die klare Definition der Zielsetzung im Geltungsbereich und die Einführung des sofortigen motorprotectiven Schaltgerätes IMPSD, was die Sicherheit und Effizienz beim Einsatz von Kontaktoren und Motorstartern verbessert. Die Norm behandelt auch wichtige Aspekte wie Überlastschutzmethoden für Motoren, die Adoption neuer Standards wie AC-7d aus der IEC 61095:2023 und die Notwendigkeit von spezifischen Umweltaspekten. Die Erwähnung von Referenzen wie IEC TS 63058 für Umwelteinflüsse und IEC TS 63208 für Cybersecurity-Aspekte verdeutlicht zudem die Relevanz dieser Norm in einem sich ständig weiterentwickelnden technologischen Umfeld. Ein weiterer Pluspunkt ist die Überarbeitung von Messmethoden, etwa zur Ermittlung des Stromverbrauchs des Elektromagneten, sowie die Aktualisierung des Anhangs C, in dem rationale Überlegungen zu AC-3e dargelegt werden. Diese Aktualisierungen sind nicht nur für Hersteller von Bedeutung, sondern auch für Ingenieure und Fachleute, die bei der Planung und Implementierung von Systemen eine hohe Sicherheits- und Effizienzanforderung haben. Insgesamt bietet die EN IEC 60947-4-1:2025 eine solide Grundlage für die Entwicklung, den Einsatz und die Prüfung von Niederspannungsschaltgeräten und ist damit von entscheidender Bedeutung für die Branche. Die normativen Vorgaben gewährleisten eine hohe Zuverlässigkeit und Sicherheit, was sie zu einem unverzichtbaren Dokument für Fachleute im Bereich der Elektrotechnik macht.
표준 EN IEC 60947-4-1:2025는 저전압 차단기 및 제어 장치의 중요한 부분으로서, 전기 기계 차단기 및 모터 스타터에 관한 내용을 다룹니다. 이 표준의 적용 범위는 전기 기계 차단기와 스타터, 모터 보호 스위칭 장치(MPSD 및 IMPSD), 그리고 연락기 릴레이의 작동기와 같은 다양한 장비를 포함합니다. 특히, 이러한 장비들이 1,000V AC 또는 1,500V DC 이하의 전압으로 작동하는 배선, 모터 회로 및 기타 부하 회로에 연결될 수 있다는 점은 중요합니다. 이번 제정은 2018년에 발표된 이전 판을 대체하고, 기술적으로 중요한 여러 변경 사항을 포함하고 있습니다. 이 표준의 강점 중 하나는 모터 보호를 위한 스위칭 장치의 정의가 명확해졌으며, 이는 사용자에게 더 나은 보호 기능을 제공합니다. 특히, IMPSD의 정의가 추가됨으로써 즉각적인 모터 보호를 위한 스위칭 장치의 다양성을 보다 충실히 반영하고 있습니다. 또한, 과부하 보호 방법과 AC-7d에 대한 채택, 그리고 환경적 측면을 다루는 IEC TS 63058로의 참조 등은 이 표준이 현 시대의 기술 발전을 반영하고 있음을 나타냅니다. 이처럼 표준의 현대화는 전기 기계 차단기의 신뢰성을 높이고, 산업 전반에서의 안정성을 보장하는 데 기여합니다. 특히, 이 표준은 모터와 관련된 다양한 기술적 요구사항을 체계적으로 정리하여, 설계 및 운영에 있어서 기준을 확립하고 있습니다. 다양한 EMC 환경, 사이버 보안 측면 및 임베디드 소프트웨어 설계에 대한 명시적 참조는, 정보 기술과의 융합이 중요시되는 현재의 추세를 고려한 것입니다. 결국 EN IEC 60947-4-1:2025는 전기 기계 차단기와 모터 스타터에 대한 종합적인 기준을 제공함으로써, 사용자와 제조업체 모두에게 안전하고 효과적인 시스템 운영을 위한 필수 지침을 제공합니다.
SIST EN IEC 60947-4-1:2025は、低圧スイッチギアおよび制御機器に関する標準の最新の改訂版であり、主に電磁接触器とモータースターターに焦点を当てています。この標準の適用範囲は、電気機器、特に電磁接触器、モータ保護スイッチングデバイス、接触器リレーのアクチュエーター、およびそれらに関連する専用アクセサリーにまで及び、さらにその使用条件は1,000 V ACまたは1,500 V DCを超えない回路に適用されます。 この第五版では、技術的改訂が行われており、前回の版であった2018年の第四版をキャンセルし置き換える形となっています。主な技術的変更点には、範囲の目的の明確化や、瞬時モータ保護スイッチングデバイス（IMPSD）の追加、異なる種類の機器やモータの過負荷保護方法の更新などがあります。これらの改訂は、機器の性能向上や安全性の一層の確保に寄与します。 特に、環境に関する側面や、動きのある配線の扱い、サイバーセキュリティの観点に関する参照の追加は、現代の機器設計における重要な要素を反映しています。また、AC-7dの採用や、フォトボルタイクアプリケーションにおける重要負荷電流の決定方法などは、需要の高い特定のアプリケーションに特化した内容と言えます。これにより、最新の市場ニーズに対応した適用性を高めています。 この標準は、低圧スイッチギアおよび制御機器に関する国際的なベンチマークとなるため、業界全体にとって重要な文書であり、関係者全員がこの標準を通じて最新の技術に基づいた製品を提供できるようになることが期待されます。全体として、SIST EN IEC 60947-4-1:2025は、業界における技術の標準化を深化させ、より安全で効率的な電力制御システムの実現に寄与するものです。
The standard EN IEC 60947-4-1:2025 provides a comprehensive framework for the design, testing, and application of low-voltage switchgear and controlgear, particularly focusing on electromechanical contactors and motor-starters. This document serves as a critical reference point for engineers and manufacturers involved in electrical installations, ensuring safety and efficiency in systems not exceeding rated voltages of 1 000 V AC or 1 500 V DC. One of the key strengths of this standard is its extensive scope, which includes electromechanical contactors, motor protective switching devices (MPSD), actuators for contactor relays, and dedicated accessories. This broad inclusion allows users to integrate the standard seamlessly into various applications across distribution circuits and motor circuits. The fifth edition's significant technical revisions enhance the clarity and applicability of the standard, addressing modern challenges faced in electrical engineering. Notable changes, such as the introduction of objective in the scope and updated methods for motor overload protection, demonstrate the standard's responsiveness to evolving technology and market needs. Additionally, the adoption of the AC-7d classification from IEC 61095:2023 indicates a commitment to aligning with international standards and practices, further enhancing its relevance. The standard also addresses contemporary concerns with references to environmental aspects in IEC TS 63058, cybersecurity via IEC TS 63208, and the integration of embedded software design guidelines as specified in IEC TR 63201. This holistic approach to safety and compliance fosters a better understanding of the operational environments of electrical devices while promoting user welfare. Furthermore, the guidelines regarding movement subject wiring, temperature limits for accessible parts, and the necessity of voltage transient limiting devices are particularly beneficial in practical applications. They not only ensure operational safety but also increase the reliability of systems, making this standard critical for engineering professionals aiming for compliance and excellence. Overall, EN IEC 60947-4-1:2025 stands out for its rigorous approach to low-voltage switchgear and control systems, providing a solid foundation for industry standards that promote innovation, safety, and efficiency in electrical engineering. Its contemporary updates reflect the growing complexity of electrical systems while ensuring compatibility and sustainability within diverse operational settings.
La norme EN IEC 60947-4-1:2025 se concentre sur les dispositifs de commutation et de contrôle basse tension, en particulier les contacteurs électromécaniques et les démarreurs de moteurs. Son champ d'application est clairement défini, incluant une gamme d'équipements tels que les dispositifs de commutation de protection des moteurs et les accessoires dédiés. Cette précision garantit que la norme est pertinente pour les professionnels du secteur, en leur fournissant des lignes directrices clairement organisées pour le choix et l'utilisation de ces équipements dans les circuits de distribution. Parmi les points forts de cette norme, on note l'inclusion de changements techniques significatifs par rapport à l'édition précédente. L'introduction de l'IMPSD (dispositif de protection des moteurs instantané) et des méthodes de protection contre les surcharges représentent des avancées cruciales pour la sécurité et l'efficacité opérationnelle. De plus, la référence à des normes connexes telles que l'IEC TS 63058 pour les aspects environnementaux et l'IEC TS 63208 pour les enjeux de cybersécurité souligne la pertinence actuelle de la norme en matière de sécurité et de durabilité. Les mises à jour concernant les relais de surcharge et l'adoption de thèmes comme la gestion des voltages transitoires attestent d'un souci de répondre aux impératifs modernes de l'industrie. La norme adapte également ses définitions pour inclure des équipements destinés à des applications photovoltaïques, ce qui élargit considérablement son domaine d'application et son impact potentiel dans le développement durable. En intégrant ces modifications techniques et en clarifiant son champ d'application, la norme EN IEC 60947-4-1:2025 s'affirme comme un outil essentiel pour les professionnels de l'électricité, garantissant que les équipements utilisés respectent des critères élevés de sécurité et d'efficacité.
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