EN 60947-4-1:2010
(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 60947-4-1:2009 applies to the types of equipment whose main contacts are intended to be connected to circuits the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c. Starters and/or contactors dealt with in this standard are not normally designed to interrupt short-circuit currents. Therefore, suitable short-circuit protection forms part of the installation but not necessarily of the contactor or the starter. This third edition replaces the second edition published in 2000 and its Amendments 1 (2002) and 2 (2005). It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition (2000) and its Amendments 1 (2002) and 2 (2005): - deletion of the test at -5 °C and +20 °C for thermal overload relays that are not compensated for ambient air temperature; - addition of conditions of the tests according to Annex Q of IEC 60947-1; - EMC tests: clarification of acceptance criteria and alignment with IEC 60947-1 for fast transient severity level; - Annex B, test for Icd: modification of the duration of the dielectric test voltage from 5 s to 60 s; - Annex B, electrical durability: improvement of the statistical aspects; - Annex H: clarification and introduction of new extended functions within electronic overload relays; - Annex K, procedure to determine data for electromechanical contactors used in functional safety applications: creation of this new annex. This standard shall be read in conjunction with IEC 60947-1, Low voltage switchgear and controlgear - Part 1: General rules. The provisions of the general rules are applicable to this standard, where specifically called for. This publication shall be read in conjunction with IEC 60947-1 :2007.
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
La CEI 60947-4-1:2009 est applicable aux types de matériels dont les contacts principaux sont destinés à être reliés à des circuits dont la tension assignée ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu. Les démarreurs et/ou contacteurs traités dans la présente norme ne sont pas normalement conçus pour interrompre les courants de court-circuit. En conséquence, une protection appropriée contre les courts-circuits fait partie de l'installation, mais pas nécessairement du contacteur ou du démarreur. Cette troisième édition annule et remplace la deuxième édition parue en 2000 et ses Amendements 1 (2002) et 2 (2005). Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente (2000) et ses Amendements 1 (2002) et 2 (2005): - suppression de l'essai à -5 °C et +20 °C pour les relais de surcharge thermiques qui ne sont pas compensés pour la température de l'air ambiant; - ajout de conditions d'essai conformes à l'Annexe Q de la CEI 60947-1; - essais CEM: clarification des critères d'acceptation et alignement sur la CEI 60947-1 pour le niveau de sécurité pour les transitoires rapides; - Annexe B, essai pour Icd: modification de la durée de la tension de l'essai diélectrique de 5 s à 60 s; - Annexe B: amélioration des aspects statistiques de la durabilité électrique; - Annexe H: clarification et introduction de nouvelles fonctions étendues dans les relais électroniques de surcharge; - Annexe K, procédure pour déterminer les données des contacteurs électromécaniques utilisés pour les applications de sécurité fonctionnelle: création de cette nouvelle annexe. La présente norme doit être lue conjointement avec la CEI 60947-1, Appareillage à basse tension - Partie 1: Règles générales. Les dispositions des règles générales sont applicables à la présente norme, lorsque cela est spécifiquement mentionné. Cette publication doit être lue conjointement avec la CEI 60947-1 :2007.
Nizkonapetostne stikalne naprave - 4-1. del: Kontaktorji in motorski zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-1:2009)
Se uporablja za vrste opreme, ki je navedena v 1.1 in 1.2 ter katere glavni kontakti so namenjeni povezavi z vezji, katerih nazivna napetost ne presega 1000 V izmeničnega toka ali 1500 V enosmernega toka.
General Information
Relations
Frequently Asked Questions
EN 60947-4-1:2010 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 60947-4-1:2009 applies to the types of equipment whose main contacts are intended to be connected to circuits the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c. Starters and/or contactors dealt with in this standard are not normally designed to interrupt short-circuit currents. Therefore, suitable short-circuit protection forms part of the installation but not necessarily of the contactor or the starter. This third edition replaces the second edition published in 2000 and its Amendments 1 (2002) and 2 (2005). It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition (2000) and its Amendments 1 (2002) and 2 (2005): - deletion of the test at -5 °C and +20 °C for thermal overload relays that are not compensated for ambient air temperature; - addition of conditions of the tests according to Annex Q of IEC 60947-1; - EMC tests: clarification of acceptance criteria and alignment with IEC 60947-1 for fast transient severity level; - Annex B, test for Icd: modification of the duration of the dielectric test voltage from 5 s to 60 s; - Annex B, electrical durability: improvement of the statistical aspects; - Annex H: clarification and introduction of new extended functions within electronic overload relays; - Annex K, procedure to determine data for electromechanical contactors used in functional safety applications: creation of this new annex. This standard shall be read in conjunction with IEC 60947-1, Low voltage switchgear and controlgear - Part 1: General rules. The provisions of the general rules are applicable to this standard, where specifically called for. This publication shall be read in conjunction with IEC 60947-1 :2007.
IEC 60947-4-1:2009 applies to the types of equipment whose main contacts are intended to be connected to circuits the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c. Starters and/or contactors dealt with in this standard are not normally designed to interrupt short-circuit currents. Therefore, suitable short-circuit protection forms part of the installation but not necessarily of the contactor or the starter. This third edition replaces the second edition published in 2000 and its Amendments 1 (2002) and 2 (2005). It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition (2000) and its Amendments 1 (2002) and 2 (2005): - deletion of the test at -5 °C and +20 °C for thermal overload relays that are not compensated for ambient air temperature; - addition of conditions of the tests according to Annex Q of IEC 60947-1; - EMC tests: clarification of acceptance criteria and alignment with IEC 60947-1 for fast transient severity level; - Annex B, test for Icd: modification of the duration of the dielectric test voltage from 5 s to 60 s; - Annex B, electrical durability: improvement of the statistical aspects; - Annex H: clarification and introduction of new extended functions within electronic overload relays; - Annex K, procedure to determine data for electromechanical contactors used in functional safety applications: creation of this new annex. This standard shall be read in conjunction with IEC 60947-1, Low voltage switchgear and controlgear - Part 1: General rules. The provisions of the general rules are applicable to this standard, where specifically called for. This publication shall be read in conjunction with IEC 60947-1 :2007.
EN 60947-4-1:2010 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 60947-4-1:2010 has the following relationships with other standards: It is inter standard links to EN 60947-4-1:2001, EN 60947-4-1:2001/A1:2002, EN 60947-4-1:2001/A2:2005, EN IEC 60947-4-1:2019, EN 60947-4-1:2010/A1:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 60947-4-1:2010 is associated with the following European legislation: EU Directives/Regulations: 2004/108/EC, 2004/108/EU, 2006/95/EC, 2014/30/EU, 2014/35/EU, 2014/53/EU. 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.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2010
1DGRPHãþD
SIST EN 60947-4-1:2002
SIST EN 60947-4-1:2002/A1:2003
SIST EN 60947-4-1:2002/A2:2006
Nizkonapetostne stikalne naprave - 4-1. del: Kontaktorji in motorski zaganjalniki -
Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-1:2009)
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters (IEC 60947-4-1:2009)
Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische
Schütze und Motorstarter (IEC 60947-4-1:2009)
Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs -
Contacteurs et démarreurs électromécaniques (CEI 60947-4-1:2009)
Ta slovenski standard je istoveten z: EN 60947-4-1:2010
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 60947-4-1
NORME EUROPÉENNE
April 2010
EUROPÄISCHE NORM
ICS 29.120.99; 29.130.20 Supersedes EN 60947-4-1:2001 + A1:2002 + A2:2005
English version
Low-voltage switchgear and controlgear -
Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters
(IEC 60947-4-1:2009)
Appareillage à basse tension - Niederspannungsschaltgeräte -
Partie 4-1: Contacteurs et démarreurs Teil 4-1: Schütze und Motorstarter -
de moteurs - Elektromechanische Schütze
Contacteurs et démarreurs und Motorstarter
électromécaniques (IEC 60947-4-1:2009)
(CEI 60947-4-1:2009)
This European Standard was approved by CENELEC on 2010-04-01. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60947-4-1:2010 E
Foreword
The text of document 17B/1674/FDIS, future edition 3 of IEC 60947-4-1, prepared by SC 17B,
Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 60947-4-1 on 2010-04-01.
This standard is to be used in conjunction with EN 60947-1.
This European Standard supersedes EN 60947-4-1:2001 + A1:2002 + A2:2005.
This EN 60947-4-1 includes the following significant technical changes with respect to the
EN 60947-4-1:2001 + A1:2002 + A2:2005:
– deletion of the test at –5 °C and +20 °C for thermal overload relays that are not compensated for
ambient air temperature;
– addition of conditions of the tests according to Annex Q of EN 60947-1;
– EMC tests: clarification of acceptance criteria and alignment with EN 60947-1 for fast transient
severity level;
– Annex B, test for Icd: modification of the duration of the dielectric test voltage from 5 s to 60 s;
– Annex B, electrical durability: improvement of the statistical aspects;
– Annex H: clarification and introduction of new extended functions within electronic overload relays;
– Annex K, procedure to determine data for electromechanical contactors used in functional safety
applications: creation of this new annex.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2011-01-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2013-04-01
with the EN have to be withdrawn
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 2004/108/EC. See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
- 3 - EN 60947-4-1:2010
Endorsement notice
The text of the International Standard IEC 60947-4-1:2009 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 60076-1:1993 NOTE Harmonized as EN 60076-1:1997 (modified).
IEC 60269-1:2006 NOTE Harmonized as EN 60269-1:2007 (not modified).
IEC 60269-2:2006 NOTE Harmonized as EN 60269-2:2007 (modified).
IEC 60664-1:2007 NOTE Harmonized as EN 60664-1:2007 (not modified).
IEC 61095:2009 NOTE Harmonized as EN 61095:2009 (not modified).
__________
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60034-1 2004 Rotating electrical machines - EN 60034-1 2004
Part 1: Rating and performance
IEC 60085 2007 Electrical insulation - Thermal evaluation EN 60085 2008
and designation
IEC 60300-3-5 2001 Dependability management - - -
Part 3-5: Application guide - Reliability test
conditions and statistical test principles
IEC 60410 1973 Sampling plans and procedures for inspection - -
by attributes
IEC 60947-1 2007 Low-voltage switchgear and controlgear - EN 60947-1 2007
Part 1: General rules
IEC 60947-2 2006 Low-voltage switchgear and controlgear - EN 60947-2 2006
Part 2: Circuit-breakers
IEC 60947-3 2008 Low-voltage switchgear and controlgear - EN 60947-3 2009
Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units
IEC 60947-5-1 2003 Low-voltage switchgear and controlgear - EN 60947-5-1 2004
Part 5-1: Control circuit devices and switching + corr. July 2005
elements - Electromechanical control circuit
devices
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity
test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 2004 Electromagnetic compatibility (EMC) - EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 2005 Electromagnetic compatibility (EMC) - EN 61000-4-5 2006
Part 4-5: Testing and measurement
techniques - Surge immunity test
- 5 - EN 60947-4-1:2010
Publication Year Title EN/HD Year
IEC 61000-4-6 2008 Electromagnetic compatibility (EMC) - EN 61000-4-6 2009
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61439-1 (mod) 2009 Low-voltage switchgear and controlgear EN 61439-1 2009
assemblies -
Part 1: General rules
IEC 61508 Series Functional safety of EN 61508 Series
electrical/electronic/programmable electronic
safety-related systems
IEC 61511 Series Functional safety - Safety instrumented EN 61511 Series
systems for the process industry sector
IEC 61513 2001 Nuclear power plants - Instrumentation and - -
control for systems important to safety -
General requirements for systems
IEC 61649 2008 Weibull analysis EN 61649 2008
IEC 61810-1 2008 Electromechanical elementary relays - EN 61810-1 2008
Part 1: General requirements
IEC 62061 2005 Safety of machinery - Functional safety of EN 62061 2005
safety-related electrical, electronic and
programmable electronic control systems
CISPR 11 (mod) 2003 Industrial scientific and medical (ISM) radio- EN 55011 2007
+ A1 2004 frequency equipment - Electromagnetic - -
1) 2)
+ A2 2006 disturbance characteristics - + A2 2007
Limits and methods of measurement
ISO 13849-1 2006 Safety of machinery - Safety-related parts of - -
control systems -
Part 1: General principles for design
1)
EN 55011 includes A1 to CISPR 11 (mod).
2)
EN 55011 is superseded by prEN 55011(fragment 1), which is based on CISPR 11:200X (fragment 1)(CISPR/B/440/CDV).
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers all
relevant essential requirements as given in Article 1 of Annex I of the Directive 2004/108/EC.
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directives concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
___________
IEC 60947-4-1 ®
Edition 3.0 2009-09
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
PRICE CODE
INTERNATIONALE
XF
CODE PRIX
ICS 29.120.99; 29.130.20 ISBN 2-8318-1058-9
– 2 – 60947-4-1 © IEC:2009
CONTENTS
FOREWORD.6
1 Scope and object.8
1.1 Scope.8
1.1.1 AC and DC contactors .8
1.1.2 AC motor-starters .8
1.2 Exclusions.10
1.3 Object .10
2 Normative references .11
3 Terms, definitions, symbols and abbreviations.12
3.1 General .12
3.2 Alphabetical index of terms .12
3.3 Terms and definitions concerning contactors .13
3.4 Terms and definitions concerning starters .15
3.5 Terms and definitions concerning characteristic quantities .19
3.6 Symbols and abbreviations.19
4 Classification.20
5 Characteristics of contactors and starters.20
5.1 Summary of characteristics .20
5.2 Type of equipment.20
5.2.1 Kind of equipment.20
5.2.2 Number of poles .20
5.2.3 Kind of current (a.c. or d.c.).20
5.2.4 Interrupting medium (air, oil, gas, vacuum, etc.) .20
5.2.5 Operating conditions of the equipment.20
5.3 Rated and limiting values for main circuits.21
5.3.1 Rated voltages .21
5.3.2 Currents or powers .22
5.3.3 Rated frequency .24
5.3.4 Rated duties .24
5.3.5 Normal load and overload characteristics .25
5.3.6 Rated conditional short-circuit current .27
5.4 Utilization category.27
5.4.1 General .27
5.4.2 Assignment of utilization categories based on the results of tests.27
5.5 Control circuits .29
5.6 Auxiliary circuits .30
5.7 Characteristics of relays and releases (overload relays) .30
5.7.1 Summary of characteristics.30
5.7.2 Types of relay or release .30
5.7.3 Characteristic values .30
5.7.4 Designation and current settings of overload relays.32
5.7.5 Time-current characteristics of overload relays.32
5.7.6 Influence of ambient air temperature .33
5.8 Co-ordination with short-circuit protective devices .33
5.9 Void .33
60947-4-1 © IEC:2009 – 3 –
5.10 Types and characteristics of automatic change-over devices and automatic
acceleration control devices .33
5.10.1 Types .33
5.10.2 Characteristics .33
5.11 Types and characteristics of auto-transformers for two-step auto-transformer
starters.34
5.12 Types and characteristics of starting resistors for rheostatic rotor starters.34
6 Product information .34
6.1 Nature of information.34
6.1.1 Identification.34
6.1.2 Characteristics, basic rated values and utilization.35
6.2 Marking .36
6.3 Instructions for installation, operation and maintenance .36
7 Normal service, mounting and transport conditions.37
8 Constructional and performance requirements.37
8.1 Constructional requirements.37
8.1.1 General .37
8.1.2 Materials .37
8.1.3 Current-carrying parts and their connections .37
8.1.4 Clearances and creepage distances .37
8.1.5 Actuator.37
8.1.6 Indication of the contact position .38
8.1.7 Additional requirements for equipment suitable for isolation .38
8.1.8 Terminals .38
8.1.9 Additional requirements for equipment provided with a neutral pole.38
8.1.10 Provisions for protective earthing .38
8.1.11 Enclosures for equipment .38
8.1.12 Degrees of protection of enclosed equipment .38
8.1.13 Conduit pull-out, torque and bending with metallic conduits .39
8.2 Performance requirements .39
8.2.1 Operating conditions.39
8.2.2 Temperature rise .44
8.2.3 Dielectric properties.46
8.2.4 Normal load and overload performance requirements .46
8.2.5 Co-ordination with short-circuit protective devices .51
8.2.6 Void.52
8.2.7 Additional requirements for combination starters and combination
switching devices suitable for isolation .52
8.3 Electromagnetic compatibility (EMC) .52
8.3.1 General .52
8.3.2 Immunity .52
8.3.3 Emission .53
9 Tests .53
9.1 Kinds of test .53
9.1.1 General .53
9.1.2 Type tests .54
9.1.3 Routine tests .54
9.1.4 Sampling tests.54
9.1.5 Special tests.55
– 4 – 60947-4-1 © IEC:2009
9.2 Compliance with constructional requirements .55
9.3 Compliance with performance requirements .55
9.3.1 Test sequences .55
9.3.2 General test conditions.56
9.3.3 Performance under no load, normal load and overload conditions .56
9.3.4 Performance under short-circuit conditions .64
9.3.5 Overload current withstand capability of contactors .69
9.3.6 Routine tests and sampling tests .69
9.4 EMC tests .70
9.4.1 General .70
9.4.2 Immunity .70
9.4.3 Emission .71
Annex A (normative) Marking and identification of terminals of contactors and
associated overload relays.81
Annex B (normative) Special tests .85
Annex C Void.93
Annex D (informative) Items subject to agreement between manufacturer and user .94
Annex E (informative) Examples of control circuit configurations.95
Annex F (normative) Requirements for auxiliary contact linked with power contact
(mirror contact) .98
Annex G (informative) Rated operational currents and rated operational powers of
switching devices for electrical motors .101
Annex H (normative) Extended functions within electronic overload relays. 105
Annex I (informative) AC1 contactors for use with semiconductor controlled motor
loads .111
Annex J Void .112
Annex K (normative) Procedure to determine data for electromechanical contactors
used in functional safety applications.113
Bibliography.122
Figure 1 – Typical curves of currents and torques during a star-delta start (see
1.1.2.2.1) .73
Figure 2 – Typical curves of currents and torques during an auto-transformer start
(see 1.1.2.2.2) .74
Figure 3 – Typical variants of protected starters, combination starters, protected
switching devices and combination switching devices .75
Figure 4 – Example of three-phase diagram of a rheostatic rotor starter with three
starting steps and one direction of rotation (in the case when all the mechanical
switching devices are contactors) .76
Figure 5 – Typical methods and diagrams of starting alternating-current induction
motors by means of auto-transformers.77
Figure 6 – Examples of speed/time curves corresponding to cases a), b), c), d), e) and
f) of 5.3.5.5 (the dotted parts of the curves correspond to the periods when no current
flows through the motor) .78
Figure 7 – Multiple of current setting limits for ambient air temperature compensated
time-delay overload relays (see 8.2.1.5.1) .79
Figure 8 – Thermal memory test .80
Figure B.1 – Examples of time-current withstand characteristic.92
60947-4-1 © IEC:2009 – 5 –
Figure F.1 − Mirror contact.99
Figure H.1 – Test circuit for the verification of the operating characteristic of a
ground/earth fault relay.
Figure K.1 – Plot of Weibull median rank regression . 121
Table 1 – Utilization categories .29
Table 2 – Trip classes of overload relays .32
Table 3 – Limits of operation of time-delay overload relays when energized on all poles.42
Table 4 – Limits of operation of three-pole time-delay overload relays when energized
on two poles only.43
Table 5 – Temperature rise limits for insulated coils in air and in oil.44
Table 6 – Intermittent duty test cycle data.45
Table 7 – Making and breaking capacities – Making and breaking conditions according
to utilization category.47
Table 8 – Relationship between current broken I and off-time for the verification of
c
rated making and breaking capacities .48
Table 9 – Operational current determination for utilization categories AC-6a and AC-6b
when derived from AC-3 ratings .49
Table 10 – Conventional operational performance – Making and breaking conditions
according to utilization category.50
Table 11 – Overload current withstand requirements .51
Table 12 – Specific acceptance criteria for immunity tests .53
Table 13 – Value of the prospective test current according to the rated operational
current .66
Table 14 – EMC immunity tests.70
Table 15 – Conducted radio-frequency emission test limits .72
Table 16 – Radiated emission test limits .72
Table B.1 – Verification of the number of on-load operating cycles – Conditions for
making and breaking corresponding to the several utilization categories.88
Table B.2 – Test conditions .91
Table F.1 – Test voltage according to altitude.99
Table G.1 – Rated operational powers and rated operational currents of motors . 102
Table H.1 – Operating time of ground/earth fault relays .107
Table K.1 – Failure mode of contactors.115
Table K.2 – Typical failure ratios for normally open contactors.119
Table K.3 – Example of 15 sorted ascending times to failure of contactors .120
– 6 – 60947-4-1 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 4-1: Contactors and motor-starters –
Electromechanical contactors and motor-starters
FOREWORD
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International Standard IEC 60947-4-1 has been prepared by subcommittee 17B: Low-voltage
switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.
This third edition replaces the second edition published in 2000 and its Amendments 1 (2002)
and 2 (2005). It is a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition (2000) and its Amendments 1 (2002) and 2 (2005):
• deletion of the test at –5 °C and +20 °C for thermal overload relays that are not
compensated for ambient air temperature;
• addition of conditions of the tests according to Annex Q of IEC 60947-1;
• EMC tests: clarification of acceptance criteria and alignment with IEC 60947-1 for fast
transient severity level;
• Annex B, test for Icd: modification of the duration of the dielectric test voltage from 5 s to
60 s;
60947-4-1 © IEC:2009 – 7 –
• Annex B, electrical durability: improvement of the statistical aspects;
• Annex H: clarification and introduction of new extended functions within electronic
overload relays;
• Annex K, procedure to determine data for electromechanical contactors used in functional
safety applications: creation of this new annex.
The text of this standard is based on the following documents:
FDIS Report on voting
17B/1674/FDIS 17B/1677/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60947 series can be found, under the general title Low-voltage
switchgear and controlgear, on the IEC website.
This standard shall be read in conjunction with IEC 60947-1, Low voltage switchgear and
controlgear – Part 1: General rules. The provisions of the general rules are applicable to this
standard, where specifically called for.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition; or
• amended.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.
– 8 – 60947-4-1 © IEC:2009
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 4-1: Contactors and motor-starters –
Electromechanical contactors and motor-starters
1 Scope and object
1.1 Scope
This part of IEC 60947 applies to the types of equipment listed in 1.1.1 and 1.1.2 whose main
contacts are intended to be connected to circuits the rated voltage of which does not exceed
1 000 V a.c. or 1 500 V d.c.
Starters and/or contactors dealt with in this standard are not normally designed to interrupt
short-circuit currents. Therefore, suitable short-circuit protection (see 9.3.4) forms part of the
installation but not necessarily of the contactor or the starter.
In this context, this standard gives requirements for:
– contactors associated with overload and/or short-circuit protective devices;
– starters associated with separate short-circuit protective devices and/or with separate
short-circuit and integrated overload protective devices;
– contactors or starters combined, under specified conditions, with their own short-circuit
protective devices. Such combinations, e.g. combination starters or protected starters are
rated as units.
For circuit-breakers and fuse-combination units used as short-circuit protective devices in
combination starters and in protected starters, the requirements of IEC 60947-2 and
IEC 60947-3 respectively apply.
Equipment covered by this standard is as follows.
1.1.1 AC and DC contactors
AC and DC contactors intended for closing and opening electric circuits and, if combined with
suitable relays (see 1.1.2), for protecting these circuits against operating overloads which
may occur therein.
NOTE For contactors combined with suitable relays and which are intended to provide short-circuit protection, the
relevant conditions specified for circuit-breakers (IEC 60947-2) additionally apply.
This standard applies also to the actuators of contactor relays and to the contacts dedicated
exclusively to the coil circuit of a contactor.
Contactors or starters with an electronically controlled electromagnet are also covered by this
standard.
1.1.2 AC motor-starters
AC motor-starters intended to start and accelerate motors to normal speed, to ensure
continuous operation of motors, to switch off the supply from the motor and to provide means
for the protection of motors and associated circuits against operating overloads.
60947-4-1 © IEC:2009 – 9 –
For overload relays for starters, including those based on electronic technology with or without
extended functions according to Annex H, the requirements of this standard apply.
1.1.2.1 Direct-on-line (full voltage) a.c. starters
Direct-on-line starters intended to start and accelerate a motor to normal speed, to provide
means for the protection of the motor and its associated circuits against operating overloads,
and to switch off the supply from the motor.
This standard applies also to reversing starters.
1.1.2.2 Reduced voltage a.c. starters
Reduced voltage a.c. starters intended to start and accelerate a motor to normal speed by
connecting the line voltage across the motor terminals in more than one step or by gradually
increasing the voltage applied to the terminals, to provide means for the protection of the
motor and its associated circuits against operating overloads, and to switch off the supply
from the motor.
Automatic change-over devices may be used to control the successive switching operations
from one step to the others. Such automatic change-over devices are, for example, time-delay
contactor relays or specified time all-or-nothing relays, under-current devices and automatic
acceleration control devices (see 5.10).
1.1.2.2.1 Star-delta starters
Star-delta starters intended to start a three-phase motor in the star connection, to ensure
continuous operation in the delta connection, to provide means for the protection of the motor
and its associated circuits against operating overloads, and to switch off the supply from the
motor.
The star-delta starters dealt with in this standard are not intended for reversing motors rapidly
and, therefore, utilization category AC-4 does not apply.
NOTE In the star connection, the current in the line and the torque of the motor are about one-third of the
corresponding values for delta connection. Therefore, star-delta starters are used when the inrush current due to
the starting is to be limited, or when the driven machine requires a limited torque for starting. Figure 1 indicates
typical curves of starting current, of starting torque of the motor and of torque of the driven machine.
1.1.2.2.2 Two-step auto-transformer starters
Two-step auto-transformer starters, intended to start and accelerate an a.c. induction motor
from rest with reduced torque to normal speed and to provide means for the protection of the
motor and its associated circuits against operating overloads, and to switch off the supply
from the motor.
This standard applies to auto-transformers which are part of the starter or which constitute a
unit specially designed to be associated with the starter.
Auto-transformer starters with more than two steps are not covered by this standard.
The auto-transformer starters dealt with in this standard are not intended for inching duty or
reversing motors rapidly and, therefore, utilization category AC-4 does not apply.
NOTE In the starting position, the current in the line and the torque of the motor related to the motor starting with
rated voltage are reduced approximately as the square of the ratio (starting voltage):(rated voltage). Therefore,
auto-transformer starters are used when the inrush current due to the starting is to be limited or when the driven
machine requires a limited torque for starting. Figure 2 indicates typical curves of starting current, of starting
torque of the motor and of torque of the driven machine.
– 10 – 60947-4-1 © IEC:2009
1.1.2.3 Rheostatic rotor starters
Starters intended to start an a.c. induction motor having a wound rotor by cutting out resistors
previously inserted in the rotor circuit, to provide means for the protection of the motor against
operating overloads and to switch off the supply from the motor.
In the case of asynchronous slip-ring motors (wound-rotors), the highest voltage between
open slip-rings is not greater than twice the rated insulation voltage of the switching devices
inserted in the rotor circuit (see 5.3.1.1.2).
NOTE This
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EN 60947-4-1:2010は、低電圧配電機器と制御機器に関する重要な標準であり、主に接触器とモータースタータに焦点を当てています。この標準の適用範囲は、主接点が最大1,000Vの交流または1,500Vの直流回路に接続されることを目的とした機器にまで広がっています。この標準は、主に短絡電流を遮断するために設計されたものではなく、そのための適切な短絡保護が設置の一部として考慮されている点が特徴です。 この標準の強みは、2000年の第2版及びその改訂版に基づいた技術的な見直しを含む点です。主な技術的変更点には、温度による熱過負荷リレーのテスト条件の削除、IEC 60947-1の附属書Qに基づくテスト条件の追加、EMCテスト基準の明確化などが含まれています。また、附属書Bでは、絶縁試験電圧の持続時間が5秒から60秒に変更され、電気的耐久性に関する統計的な観点が改善されています。これらの変更は、製品の信頼性を向上させるために非常に重要です。 さらに、附属書Hでは、電子過負荷リレーに新たな拡張機能の明確化がされており、附属書Kでは機能安全用途における電気機械的接触器に関するデータを決定する手順が新たに作成されています。これらの改訂は、現代の技術ニーズに対応したものとなっており、特に安全性と耐久性が求められる分野での関連性を高めています。 この標準は、IEC 60947-1と併せて読むことが求められ、一般規則の規定が適用されることが明示されています。このため、低電圧配電機器と制御機器に関する包括的な理解を助ける重要な文書であると言えます。
Die Norm EN 60947-4-1:2010 behandelt Niederspannungs-Schaltgeräte und Steuergeräte und ist speziell auf Kontaktoren und Motorstarter ausgerichtet, die elektromagnetisch arbeiten. Der Anwendungsbereich dieser Norm umfasst Geräte, deren Hauptkontakte für Kreise mit einer Nennspannung von bis zu 1.000 V Wechselstrom oder 1.500 V Gleichstrom vorgesehen sind. Ein wichtiger Aspekt dieser Norm ist, dass die verwendeten Starter und Kontaktoren nicht dafür ausgelegt sind, Kurzschlüsse zu unterbrechen. Stattdessen muss eine geeignete Kurzschlussschutzmaßnahme Teil der Installation sein. Die dritte Ausgabe der Norm ersetzt die vorherige Ausgabe von 2000 sowie deren Änderungen 1 (2002) und 2 (2005) und stellt somit eine technische Überarbeitung dar. Wesentliche Änderungen betreffen unter anderem die Löschung des Tests bei -5 °C und +20 °C für thermische Überlastrelais, die nicht für Umgebungstemperaturen ausgelegt sind. Zudem wurden die Prüfbedingungen gemäß Anhang Q der IEC 60947-1 hinzugefügt, was die Relevanz dieser Norm für aktuelle technische Anforderungen unterstreicht. Ein weiterer Schwerpunkt liegt auf den elektromagnetischen Verträglichkeitstests (EMC), die durch klare Akzeptanzkriterien und die Angleichung an die IEC 60947-1 hinsichtlich der Schweregrade schneller transiente Störungen verbessert wurden. Auch die Änderungen im Anhang B zur elektrischen Beständigkeit und die Einführung neuer erweiterter Funktionen in elektronischen Überlastrelais (Anhang H) verdeutlichen die Notwendigkeit, moderne Technologien in die Norm zu integrieren. Darüber hinaus ist der Anhang K neu eingeführt worden, um Daten für elektromechanische Kontaktoren, die in Anwendungen mit funktionaler Sicherheit verwendet werden, zu bestimmen. Dies zeigt die zunehmende Bedeutung von Sicherheitsanforderungen in der Branche und die Anpassungsfähigkeit der Norm an neue Herausforderungen. Die Norm EN 60947-4-1:2010 ist von großer Relevanz für Fachleute in der Elektroinstallationstechnik und ermöglicht durch die umfassenden Anforderungen und klaren Richtlinien eine sichere und zuverlässige Anwendung der Niederspannungs-Schaltgeräte. Durch die notwendige Verbindung mit der IEC 60947-1 wird sichergestellt, dass die allgemeinen Regeln ebenfalls berücksichtigt werden, was die Sicherheit und Effizienz der installierten Systeme weiter verbessert.
The standard EN 60947-4-1:2010 provides essential guidelines for low-voltage switchgear and controlgear, specifically focusing on electromechanical contactors and motor-starters. Its scope is well-defined, covering equipment meant for circuits with rated voltages not exceeding 1,000 V a.c. or 1,500 V d.c. A key strength of this standard is its emphasis on ensuring that the contactors and starters are used in conjunction with appropriate short-circuit protection, affirming the importance of safety in electrical installations. This third edition of the standard represents a significant technical revision from previous versions, incorporating valuable updates to enhance reliability and performance. Notably, the deletion of tests at -5 °C and +20 °C for thermal overload relays that are not ambient temperature compensated streamlines testing protocols, ensuring they focus on relevant performance metrics. Additionally, the clarification of acceptance criteria for EMC tests aligns the standard with IEC 60947-1, reinforcing consistency across similar standards. The modifications in Annex B regarding the dielectric test voltage duration and improved statistical aspects for electrical durability are critical enhancements that address the evolving needs of electrical safety and reliability. Furthermore, the introduction of new extended functions in electronic overload relays in Annex H represents a forward-thinking approach, accommodating advancements in technology and application scenarios. The creation of Annex K, which details a procedure for determining data for electromechanical contactors used in functional safety applications, underscores the relevance of this standard in an increasingly safety-conscious industry. Additionally, the standard's integration with IEC 60947-1 ensures a comprehensive framework that practitioners can rely on. Overall, EN 60947-4-1:2010 remains highly relevant for professionals in electrical engineering and safety compliance, providing critical guidance for the design, testing, and application of low-voltage switchgear components within various industrial settings. The enhancements and clarifications made in this edition ensure that it meets the current demands and technological advancements in the field, solidifying its role as a vital resource for industry stakeholders.
SIST EN 60947-4-1:2010 표준은 저전압 차단기 및 제어 장비의 중요한 요소인 접촉기 및 모터 시동 장치에 대한 포괄적인 규정을 제공합니다. 이 표준의 범위는 1,000V a.c. 또는 1,500V d.c.의 정격 전압을 초과하지 않는 회로에 연결할 목적으로 설계된 장비의 주 접촉기를 포함합니다. 특히, 이 표준은 단락 전류를 차단하기 위한 설계가 포함되지 않는 접촉기 및 모터 시동 장치에 초점을 맞추고 있어, 설치 과정에서 적절한 단락 보호 장치의 필요성을 강조합니다. 이 문서는 2000년에 발행된 두 번째 판을 대체하며, 그 수정판(2002년, 2005년)과 비교하여 기술적으로 중요한 여러 변경 사항을 포함하고 있습니다. 예를 들어, 비보상 열 과부하 릴레이를 위한 -5°C 및 +20°C에서의 시험 삭제는 보다 실용적인 운영 환경을 반영하고, IEC 60947-1의 부록 Q에 따른 시험 조건 추가로 표준의 일관성을 높였습니다. 또한, EMC 시험에서 수용 기준의 명확화와 IEC 60947-1과의 정렬은 전자 기기의 신뢰성을 더욱 강화하는 요소입니다. 부록 B에서의 절연 저항 시험 전압의 지속시간 변경(5초에서 60초로 변경)과 전기 내구성의 통계적 측면 개선은 본 표준의 실용성을 높입니다. 전자 과부하 릴레이의 새로운 기능에 대한 명확한 설명과 기능 안전 응용을 위한 전자기계 접촉기 데이터 결정 절차를 포함하는 새로운 부록 K의 추가는 이 표준이 현대 기술의 요구를 충족시킨다는 점에서 큰 의미가 있습니다. SIST EN 60947-4-1:2010 표준은 IEC 60947-1과 함께 읽혀야 하며, 일반 규칙의 조항이 구체적으로 요구될 경우 이 표준에 적용됩니다. 따라서 저전압 차단기 및 제어 장비 분야의 전문가와 사용자는 이 표준의 적용을 통해 더욱 안전하고 신뢰할 수 있는 전기 시스템을 구축할 수 있습니다.
La norme SIST EN 60947-4-1:2010, intitulée « Appareils de commutation et de contrôle basse tension - Partie 4-1 : Contacteurs et démarreurs de moteur - Contacteurs électromécaniques et démarreurs de moteur », s’applique aux équipements dont les contacts principaux sont destinés à être connectés à des circuits dont la tension assignée ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu. Cette norme offre une couverture essentielle pour les dispositifs régissant le fonctionnement des contacteurs et démarreurs de moteur, en précisant les exigences nécessaires pour garantir leur fiabilité et leur sécurité. Parmi les forces notables de cette norme, on trouve la mise à jour technique importante par rapport à son édition précédente de 2000 et ses amendements. La suppression du test à -5 °C et +20 °C pour les relais de surcharge thermique non compensés pour la température ambiante apporte une meilleure pertinence à l'évaluation des performances des dispositifs. De plus, l'ajout des conditions de tests selon l'Annexe Q de la norme IEC 60947-1 renforce la rigueur des essais. Les tests d'immunité électromagnétique (EMC) sont également clarifiés, notamment en ce qui concerne les critères d'acceptation, ce qui nous permet d'assurer que les contacteurs et démarreurs de moteur peuvent fonctionner correctement même dans des environnements électromagnétiques complexes. La modification du temps de test diélectrique, passant de 5 s à 60 s, dans l'Annexe B, améliore nos connaissances sur la durabilité électrique des dispositifs, ce qui est crucial pour les applications à long terme. L'introduction de nouvelles fonctions étendues pour les relais de surcharge électroniques dans l'Annexe H démontre une avancée vers l'intégration de technologies modernes, tandis que l'Annexe K, dédiée à la détermination des données pour les contacteurs électromécaniques utilisés dans des applications de sécurité fonctionnelle, répond à des besoins croissants dans le secteur de la sécurité. Il est à noter que cette norme doit être lue en conjonction avec IEC 60947-1, ce qui assure une cohérence et une application appropriée des règles générales à cette partie spécifique des équipements, garantissant ainsi une compréhension exhaustive et des pratiques de mise en œuvre standardisées. En somme, la norme SIST EN 60947-4-1:2010 représente une avancée significative dans le domaine des contacteurs et démarreurs de moteur, en intégrant des éléments techniques actualisés qui répondent aux exigences modernes de sécurité et de performance. Sa pertinence dans le cadre de la basse tension la rend essentielle pour les professionnels et les techniciens œuvrant dans ce domaine.
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