IEC 60947-5-1:2016
(Main)Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices
Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices
IEC 60947-5-1:2016 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies to control circuit devices having a rated voltage not exceeding 1 000 V a.c. (at a frequency not exceeding 1 000 Hz) or 600 V d.c. This fourth edition cancels and replaces the third edition published in 2003 and its Amendment 1:2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) update of normative references;
b) update and restructuration of subclauses in 7.1;
c) addition of material requirements and test;
d) udpate of EMC requirements;
e) clarification of requirements and update of 8.2;
f) addition of requirements for screwless-type clamping units;
g) udpate of existing Tables 4 and 5;
h) addition of new Tables 6, 7, 8 and 9;
i) addition of a new Figure 10 ;
j) addition of a new Annex N.
This publication is to be read in conjunction with IEC 60947-1:2007.
The contents of the corrigendum of July 2016 and the corrigendum of April 2020 have been included in this copy.
Appareillage à basse tension - Partie 5-1: Appareils et éléments de commutation pour circuits de commande - Appareils électromécaniques pour circuits de commande
L'IEC 60947-5-1:2016 est applicable aux appareils pour circuits de commande et aux éléments de commutation destinés à la commande, la signalisation, le verrouillage, etc., de l'appareillage. Elle est applicable aux appareils pour circuits de commande dont la tension assignée ne dépasse pas 1 000 V en courant alternatif (à une fréquence ne dépassant pas 1 000 Hz) ou 600 V en courant continu. Cette quatrième édition annule et remplace la troisième édition parue en 2003 et l'Amendement 1:2009. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) mise à jour des références normatives;
b) mise à jour et restructuration des paragraphes du 7.1;
c) addition des exigences et de l'essai relatif aux matériaux;
d) mise à jour des exigences CEM;
e) clarification des exigences et mise à jour du 8.2;
f) addition des exigences pour les organes de serrage sans vis;
g) mise à jour des Tableaux 4 et 5 existants;
h) addition des nouveaux Tableaux 6,7, 8 et 9;
i) addition de la nouvelle Figure 10;
j) addition de la nouvelle Annexe N.
Cette publication doit être lue conjointement avec la IEC 60947-1:2007.
Le contenu du corrigendum de juillet 2016 et d'avril 2020 a été pris en considération dans cet exemplaire.
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Standards Content (Sample)
IEC 60947-5-1 ®
Edition 4.0 2016-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Low-voltage switchgear and controlgear –
Part 5-1: Control circuit devices and switching elements – Electromechanical
control circuit devices
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 60947-5-1 ®
Edition 4.0 2016-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Low-voltage switchgear and controlgear –
Part 5-1: Control circuit devices and switching elements – Electromechanical
control circuit devices
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.40; 29.130.20 ISBN 978-2-8322-3431-0
– 2 – IEC 60947-5-1:2016 RLV © IEC 2016
CONTENTS
FOREWORD. 9
1 General . 12
1.1 Scope and object . 12
1.2 Normative references . 13
2 Terms and definitions . 15
2.1 Basic terms and definitions . 18
2.2 Control switches. 18
2.3 Parts of control switches . 21
2.4 Operation of control switches . 23
2.4.1 Operation of contactor relays . 23
2.4.2 Operation of pilot switches . 24
2.4.3 Operation of rotary switches . 24
2.4.4 Operation of mechanically operated control switches . 25
3 Classification . 26
3.1 Contact elements . 26
3.2 Control switches. 26
3.3 Control circuit devices . 27
3.4 Time delay switching elements . 27
3.5 Control switch mounting . 27
4 Characteristics . 27
4.1 Summary of characteristics . 27
4.1.1 General . 27
4.1.2 Operation of a control switch . 27
4.2 Type of control circuit device or switching element . 27
4.2.1 Kind of control circuit device . 27
4.2.2 Kind of switching elements . 28
4.2.3 Number of poles . 28
4.2.4 Kind of current . 28
4.2.5 Interrupting medium . 28
4.2.6 Operating conditions . 28
4.3 Rated and limiting values for switching elements . 28
4.3.1 General . 28
4.3.2 Rated voltages (of a switching element). 29
4.3.3 Currents . 29
4.3.4 Rated frequency. 29
4.3.5 Vacant . 29
4.3.6 Normal and abnormal load characteristics . 29
4.3.7 Short-circuit characteristics . 30
4.4 Utilization categories for switching elements . 30
4.5 Vacant . 30
4.6 Vacant . 30
4.7 Vacant . 30
4.8 Vacant . 30
4.9 Switching overvoltages Vacant . 30
4.10 Electrically separated contact elements . 30
4.11 Actuating quantities for pilot switches . 30
4.12 Pilot switches having two or more contact elements . 31
5 Product information . 31
5.1 Nature of information . 31
5.2 Marking . 32
5.2.1 General . 32
5.2.2 Terminal identification and marking . 32
5.2.3 Functional markings . 32
5.2.4 Emergency stop . 32
5.2.5 Operating diagram . 32
5.2.6 Time delay markings . 33
5.3 Instructions for installation, operation and maintenance . 33
5.4 Additional information . 33
6 Normal service, mounting and transport conditions . 33
6.3.1 Mounting of single hole mounted devices . 33
7 Constructional and performance requirements . 35
7.1 Constructional requirements . 35
7.1.1 General . 35
7.1.2 Materials . 35
7.1.3 Current-carrying parts and their connections . 36
7.1.4 Clearances and creepage distances . 36
7.1.7 Conditions for control switches suitable for isolation . 36
7.1.8 Terminals . 37
7.1.14 Class II control circuit devices . 37
7.1.15 Requirements for control devices with integrally connected cables . 37
7.2 Performance requirements . 37
7.2.3 Dielectric properties . 37
7.2.4 Ability to make and break under normal and abnormal load conditions . 37
7.2.5 Conditional short-circuit current . 38
7.2.6 Switching overvoltages Vacant . 38
7.2.7 Additional requirements for control switches suitable for isolation . 38
7.2.8 Maximum recovery time . 38
7.3 Electromagnetic compatibility (EMC) . 38
7.3.1 General . 38
7.3.2 Immunity . 38
7.3.3 Emission . 39
8 Tests . 45
8.1 Kinds of test . 45
8.1.1 General . 45
8.1.2 Type tests . 45
8.1.3 Routine tests . 45
8.1.4 Sampling tests . 46
8.1.5 Special tests . 46
8.2 Compliance with constructional requirements . 46
8.2.1 Materials . 46
8.2.2 Equipment . 47
8.2.3 Enclosures for equipment . 47
8.2.4 Mechanical and electrical properties of terminals . 47
8.2.5 Verification of actuating force (or moment) . 48
– 4 – IEC 60947-5-1:2016 RLV © IEC 2016
8.2.6 Verification of limitation of rotation (of a rotary switch) . 48
8.2.7 Conduit pull-out test, torque test and bending test with metallic conduits . 48
8.3 Performance . 49
8.3.1 Test sequences. 49
8.3.2 General test conditions . 49
8.3.3 Performance under no-load, normal load and abnormal load conditions . 50
8.3.4 Performance under conditional short-circuit current . 53
8.4 Tests for EMC . 54
8.4.1 General . 54
8.4.2 Immunity . 54
8.4.3 Emission . 55
8.4.4 Test results and test report . 55
Annex A (normative) Electrical ratings based on utilization categories (see 3.1) . 63
Annex B (normative) Example of inductive test loads for d.c. contacts . 65
B.1 General . 65
B.2 Construction . 65
Annex C (normative) Special tests – Durability tests . 67
C.1 General . 67
C.1.1 Durability declaration . 67
C.1.2 Test procedures . 67
C.1.3 Failure criteria . 68
C.2 Mechanical durability . 68
C.2.1 General . 68
C.2.2 Test procedures . 68
C.3 Electrical durability . 68
C.3.1 General . 68
C.3.2 Test procedures . 68
Annex D Clearances and creepage distances of control circuit devices Vacant . 74
Annex E (normative) Items subject to agreement between manufacturer and user . 75
Annex F (normative) Class II control circuit devices insulated by encapsulation
Requirements and tests . 76
F.1 General . 76
F.2 Terms and definitions . 76
F.5 Marking . 76
F.7 Instructional and functional requirements . 77
F.7.1 Choice of compound . 77
F.7.2 Adhesion of the compound . 77
F.7.3 Dielectric properties . 77
F.8 Tests . 77
F.8.1 Kind of tests . 77
Annex G (normative) Additional requirements for control circuit devices with integrally
connected cables . 80
G.1 General . 80
G.2 Terms and definitions . 80
G.7 Constructional and performance requirements . 80
G.7.1 Constructional requirements . 80
G.7.2 Performance requirements . 81
G.8 Tests . 81
G.8.1 General . 81
G.8.2 Type tests . 81
G.8.3 Results to be obtained . 82
Annex H (normative) Additional requirements for semiconductor switching elements
for control circuit devices . 83
H.1 General . 83
H.1.1 Scope .
H.1.2 Object .
H.2 Terms and definitions . 83
H.3 Classification . 83
H.3.1 Semiconductor switching elements . 83
H.4 Characteristics . 84
H.4.1 Rated voltage . 84
H.4.2 Utilization categories . 84
H.5 Product information . 84
H.7 Constructional and performance requirements . 84
H.7.1 Performance requirements . 84
H.7.2 Ability to make under abnormal and normal conditions . 85
H.7.3 Conditional short-circuit current . 85
H.7.4 Electromagnetic compatibility (EMC) . 85
H.8 Tests . 85
H.8.1 Type tests . 85
H.8.2 Voltage drop (U ). 85
d
H.8.3 Minimum operational current (I ) . 86
m
H.8.4 OFF-state current (I ) . 86
r
H.8.5 Making and breaking capacities . 86
H.8.6 Performance under short-circuit current conditions . 86
H.8.7 Verification of electromagnetic compatibility . 87
Annex J (normative) Special requirements for indicator lights and indicating towers . 91
J.1 General . 91
J.1.1 Scope .
J.1.2 Object .
J.2 Terms and definitions . 91
J.3 Classification . 91
J.4 Characteristics . 92
J.4.1 Rated operational voltage of an indicator light . 92
J.4.2 Rated thermal power of an indicator light . 92
J.4.3 Rated values of the lamp . 92
J.5 Product information . 92
J.6 Normal service, mounting and transport conditions . 92
J.7 Constructional and performance requirements . 93
J.8 Tests . 94
J.8.3 Tests for indicator lights and indicating towers . 94
J.8.4 Shock and vibration . 95
J.8.5 Degree of protection for indicating towers . 96
Annex K (normative) Special requirements for control switches with direct opening
action . 97
K.1 General . 97
K.1.1 Scope .
– 6 – IEC 60947-5-1:2016 RLV © IEC 2016
K.1.2 Object .
K.2 Terms and definitions . 97
K.3 Classification . 97
K.4 Characteristics . 98
K.4.4 Utilization categories for switching elements . 98
K.5 Product information . 98
K.5.2 Marking . 98
K.5.4 Additional information . 98
K.6 Normal service, mounting and transport conditions . 99
K.7 Constructional and performance requirements . 99
K.8 Tests . 100
Annex L (normative) Special requirements for mechanically linked contact elements . 103
L.1 General . 103
L.1.1 Scope .
L.1.2 Object .
L.2 Terms and definitions . 103
L.3 Classification . 103
L.4 Characteristics . 103
L.5 Product information . 104
L.6 Normal service, mounting and transport conditions . 104
L.7 Constructional and performance requirements . 104
L.8 Tests . 105
L.8.4 Special test for mechanically linked contact elements . 105
Annex M (normative) Terminal marking, distinctive number and distinctive letter for
control circuit devices . 106
M.1 Scope . 106
M.2 Terminal marking rule . 106
M.2.1 General . 106
M.2.2 Function digit . 106
M.2.3 Sequence digit . 106
M.2.4 Numbering method . 107
M.3 Distinctive number and distinctive letter . 107
M.3.1 General . 107
M.3.2 Distinctive number . 107
M.3.3 Distinctive letter . 107
M.4 Terminal numbering sequence . 107
M.5 Contactor relays designated by the distinctive letter E . 108
M.6 Contactor relays designated by distinctive letters X, Y or Z . 110
M.6.1 Contactor relays designated by the distinctive letter Z . 110
M.6.2 Contactor relays designated by the distinctive letter X . 110
M.6.3 Contactor relays designated by the distinctive letter Y . 110
Annex N (normative) Procedure to determine reliability data for electromechanical
devices in control circuits used in functional safety applications . 111
N.1 General . 111
N.1.1 Overview . 111
N.1.2 Scope and object . 111
N.1.3 General requirements . 111
N.2 Terms, definitions and symbols . 111
N.3 Method based on durability test results . 111
N.3.1 General method . 111
N.3.2 Test requirements . 111
N.3.3 Number of samples . 112
N.3.4 Characterization of a failure mode . 112
N.3.5 Weibull modelling . 112
N.3.6 Useful life and upper limit of failure rate. 112
N.3.7 Reliability data . 112
N.4 Data information . 112
N.5 Example . 112
Bibliography . 113
Figure 1 – Examples of the recommended method for drawing an operating diagram of
a rotary switch . 57
Figure 2 – Operation of push-buttons . 58
Figure 3 – Difference e between the over-travel of the actuator and that of the contact
element . 58
Figure 4 – Examples of contact elements (schematic sketches) . 59
Figure 5 – Test circuits for multi-pole control switches – Contacts of same polarity, not
electrically separated . 60
Figure 6 – Test circuits for multi-pole control switches – Contacts of opposite polarity,
and electrically separated . 60
Figure 7 – Load L details for test conditions requiring different values of make and
d
break current and/or power factor (time constant) . 61
Figure 8 – Test circuit, conditional short-circuit current (see 8.3.4.2) . 61
Figure 9 – Current/time limits for d.c. test loads (see 8.3.3.5.4) . 62
Figure 10 – Voltage drop measurement at contact point of the clamping unit or terminal . 62
Figure B.1 – Construction of load for d.c. contacts . 66
Figure C.1 – Normal circuit (see C.3.2.2) . 70
Figure C.2 – Simplified circuit (see C.3.2.2) . 70
Figure F.1 – Insulation by encapsulation . 77
Figure F.2 – Test apparatus . 78
Figure H.1 – Relationship between U and U . 84
e B
Figure H.2 – Example of test circuit for the verification of voltage drop, minimum
operational current and OFF-state current (see H.8.2, H.8.3 and H.8.4) . 86
Figure H.3 – Short-circuit testing (see H.8.6.1) . 87
Figure J.1 – Mounting dimensions for indicating tower socket . 93
Figure J.2 – Mounting dimensions for temperature rise tests . 94
Figure K.1 – Verification of robustness of the actuating system. 102
Figure L.1 – Example of representation of NO and NC contacts which are mechanically
linked and NC non-linked contact . 104
Figure L.2 – Symbol for device containing mechanically linked contacts . 104
Table 1 – Utilization categories for switching elements . 30
Table 2 – Mounting hole diameter and dimensions of the key recess (if any) . 34
Table 3 – Preferred minimum distances between centres of mounting holes . 34
Table 4 – Verification of making and breaking capacities of switching elements under
normal conditions corresponding to the utilization categories . 40
– 8 – IEC 60947-5-1:2016 RLV © IEC 2016
Table 5 – Verification of making and breaking capacities of switching elements under
abnormal conditions corresponding to the utilization categories . 42
Table 6 – Test conditions for glow-wire test . 42
Table 7 – Acceptance criteria . 43
Table 8 – Immunity tests . 44
Table 9 – Test values for electrical performance and ageing test of screwless-type
clamping units . 56
Table A.1 – Examples of contact rating designation based on utilization categories . 63
Table A.2 – Examples of semiconductors switching element ratings for 50 Hz
and/or 60 Hz . 64
Table A.3 – Examples of semiconductors switching element ratings for d.c. . 64
Table B.1 – DC loads . 66
Table C.1 – Making and breaking conditions for electrical durability . 69
Table H.1 – Immunity tests .
Table M.1 – Diagrams of control switches. 108
Table M.2 – Diagrams of contactor relays designated by the distinctive letter E . 109
Table M.3 – Diagrams of contactor relays designated by the distinctive letter Y . 110
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-1: Control circuit devices and switching elements –
Electromechanical control circuit devices
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– 10 – IEC 60947-5-1:2016 RLV © IEC 2016
International Standard IEC 60947-5-1 has been prepared by subcommittee 121A: Low-voltage
switchgear and controlgear, of IEC technical committee 121: Switchgear and controlgear and
their assemblies for low voltage.
This fourth edition cancels and replaces the third edition published in 2003 and its
Amendment 1:2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) update of normative references;
b) update and restructuration of subclauses in 7.1;
c) addition of material requirements and test;
d) udpate of EMC requirements;
e) clarification of requirements and update of 8.2;
f) addition of requirements for screwless-type clamping units;
g) udpate of existing Tables 4 and 5;
h) addition of new Tables 6, 7, 8 and 9;
i) addition of a new Figure 10 ;
j) addition of a new Annex N.
The text of this standard is based on the following documents:
FDIS Report on voting
121A/62/FDIS 121A/76/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.
This International Standard should be used in conjunction with IEC 60947-1.
The provisions of the general rules, IEC 60947-1, are applicable to t
...
IEC 60947-5-1 ®
Edition 4.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear –
Part 5-1: Control circuit devices and switching elements – Electromechanical
control circuit devices
Appareillage à basse tension –
Partie 5-1: Appareils et éléments de commutation pour circuits de commande –
Appareils électromécaniques pour circuits de commande
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International Standards for all electrical, electronic and related technologies.
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and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
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IEC 60947-5-1 ®
Edition 4.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear –
Part 5-1: Control circuit devices and switching elements – Electromechanical
control circuit devices
Appareillage à basse tension –
Partie 5-1: Appareils et éléments de commutation pour circuits de commande –
Appareils électromécaniques pour circuits de commande
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40; 29.130.20 ISBN 978-2-8322-3325-2
– 2 – IEC 60947-5-1:2016 © IEC 2016
CONTENTS
FOREWORD. 9
1 General . 11
1.1 Scope and object . 11
1.2 Normative references . 12
2 Terms and definitions . 14
2.1 Basic terms and definitions . 16
2.2 Control switches. 17
2.3 Parts of control switches . 20
2.4 Operation of control switches . 22
2.4.1 Operation of contactor relays . 22
2.4.2 Operation of pilot switches . 22
2.4.3 Operation of rotary switches . 23
2.4.4 Operation of mechanically operated control switches . 24
3 Classification . 25
3.1 Contact elements . 25
3.2 Control switches. 25
3.3 Control circuit devices . 25
3.4 Time delay switching elements . 25
3.5 Control switch mounting . 25
4 Characteristics . 25
4.1 Summary of characteristics . 25
4.1.1 General . 25
4.1.2 Operation of a control switch . 26
4.2 Type of control circuit device or switching element . 26
4.2.1 Kind of control circuit device . 26
4.2.2 Kind of switching elements . 26
4.2.3 Number of poles . 26
4.2.4 Kind of current . 26
4.2.5 Interrupting medium . 27
4.2.6 Operating conditions . 27
4.3 Rated and limiting values for switching elements . 27
4.3.1 General . 27
4.3.2 Rated voltages (of a switching element). 27
4.3.3 Currents . 28
4.3.4 Rated frequency. 28
4.3.5 Vacant . 28
4.3.6 Normal and abnormal load characteristics . 28
4.3.7 Short-circuit characteristics . 28
4.4 Utilization categories for switching elements . 28
4.5 Vacant . 29
4.6 Vacant . 29
4.7 Vacant . 29
4.8 Vacant . 29
4.9 Vacant . 29
4.10 Electrically separated contact elements . 29
4.11 Actuating quantities for pilot switches . 29
4.12 Pilot switches having two or more contact elements . 29
5 Product information . 29
5.1 Nature of information . 29
5.2 Marking . 30
5.2.1 General . 30
5.2.2 Terminal identification and marking . 30
5.2.3 Functional markings . 31
5.2.4 Emergency stop . 31
5.2.5 Operating diagram . 31
5.2.6 Time delay markings . 31
5.3 Instructions for installation, operation and maintenance . 31
5.4 Additional information . 32
6 Normal service, mounting and transport conditions . 32
6.3.1 Mounting of single hole mounted devices . 32
7 Constructional and performance requirements . 33
7.1 Constructional requirements . 33
7.1.1 General . 33
7.1.2 Materials . 33
7.1.3 Current-carrying parts and their connections . 34
7.1.4 Clearances and creepage distances . 34
7.1.7 Conditions for control switches suitable for isolation . 35
7.1.8 Terminals . 35
7.1.14 Class II control circuit devices . 35
7.1.15 Requirements for control devices with integrally connected cables . 35
7.2 Performance requirements . 35
7.2.3 Dielectric properties . 35
7.2.4 Ability to make and break under normal and abnormal load conditions . 35
7.2.5 Conditional short-circuit current . 36
7.2.6 Vacant . 36
7.2.7 Additional requirements for control switches suitable for isolation . 36
7.2.8 Maximum recovery time . 36
7.3 Electromagnetic compatibility (EMC) . 36
7.3.1 General . 36
7.3.2 Immunity . 37
7.3.3 Emission . 38
8 Tests . 43
8.1 Kinds of test . 43
8.1.1 General . 43
8.1.2 Type tests . 43
8.1.3 Routine tests . 43
8.1.4 Sampling tests . 44
8.1.5 Special tests . 44
8.2 Compliance with constructional requirements . 44
8.2.1 Materials . 44
8.2.2 Equipment . 44
8.2.3 Enclosures for equipment . 45
8.2.4 Mechanical and electrical properties of terminals . 45
8.2.5 Verification of actuating force (or moment) . 46
– 4 – IEC 60947-5-1:2016 © IEC 2016
8.2.6 Verification of limitation of rotation (of a rotary switch) . 46
8.2.7 Conduit pull-out test, torque test and bending test with metallic conduits . 46
8.3 Performance . 46
8.3.1 Test sequences. 46
8.3.2 General test conditions . 47
8.3.3 Performance under no-load, normal load and abnormal load conditions . 48
8.3.4 Performance under conditional short-circuit current . 51
8.4 Tests for EMC . 52
8.4.1 General . 52
8.4.2 Immunity . 52
8.4.3 Emission . 53
8.4.4 Test results and test report . 53
Annex A (normative) Electrical ratings based on utilization categories (see 3.1) . 61
Annex B (normative) Example of inductive test loads for d.c. contacts . 63
B.1 General . 63
B.2 Construction . 63
Annex C (normative) Special tests – Durability tests . 65
C.1 General . 65
C.1.1 Durability declaration . 65
C.1.2 Test procedures . 65
C.1.3 Failure criteria . 66
C.2 Mechanical durability . 66
C.2.1 General . 66
C.2.2 Test procedures . 66
C.3 Electrical durability . 66
C.3.1 General . 66
C.3.2 Test procedures . 66
Annex D Vacant . 69
Annex E (normative) Items subject to agreement between manufacturer and user . 70
Annex F (normative) Class II control circuit devices insulated by encapsulation
Requirements and tests . 71
F.1 General . 71
F.2 Terms and definitions . 71
F.5 Marking . 71
F.7 Instructional and functional requirements . 72
F.7.1 Choice of compound . 72
F.7.2 Adhesion of the compound . 72
F.7.3 Dielectric properties . 72
F.8 Tests . 72
F.8.1 Kind of tests . 72
Annex G (normative) Additional requirements for control circuit devices with integrally
connected cables . 75
G.1 General . 75
G.2 Terms and definitions . 75
G.7 Constructional and performance requirements . 75
G.7.1 Constructional requirements . 75
G.7.2 Performance requirements . 76
G.8 Tests . 76
G.8.1 General . 76
G.8.2 Type tests . 76
G.8.3 Results to be obtained . 77
Annex H (normative) Additional requirements for semiconductor switching elements
for control circuit devices . 78
H.1 General . 78
H.2 Terms and definitions . 78
H.3 Classification . 78
H.3.1 Semiconductor switching elements . 78
H.4 Characteristics . 78
H.4.1 Rated voltage . 78
H.4.2 Utilization categories . 79
H.5 Product information . 79
H.7 Constructional and performance requirements . 79
H.7.1 Performance requirements . 79
H.7.2 Ability to make under abnormal and normal conditions . 80
H.7.3 Conditional short-circuit current . 80
H.7.4 Electromagnetic compatibility (EMC) . 80
H.8 Tests . 80
H.8.1 Type tests . 80
H.8.2 Voltage drop (U ). 80
d
H.8.3 Minimum operational current (I ) . 81
m
H.8.4 OFF-state current (I ) . 81
r
H.8.5 Making and breaking capacities . 81
H.8.6 Performance under short-circuit current conditions . 81
H.8.7 Verification of electromagnetic compatibility . 82
Annex J (normative) Special requirements for indicator lights and indicating towers . 84
J.1 General . 84
J.2 Terms and definitions . 84
J.3 Classification . 84
J.4 Characteristics . 85
J.4.1 Rated operational voltage of an indicator light . 85
J.4.2 Rated thermal power of an indicator light . 85
J.4.3 Rated values of the lamp . 85
J.5 Product information . 85
J.6 Normal service, mounting and transport conditions . 85
J.7 Constructional and performance requirements . 86
J.8 Tests . 86
J.8.3 Tests for indicator lights and indicating towers . 86
J.8.4 Shock and vibration . 88
J.8.5 Degree of protection for indicating towers . 89
Annex K (normative) Special requirements for control switches with direct opening
action . 90
K.1 General . 90
K.2 Terms and definitions . 90
K.3 Classification . 90
K.4 Characteristics . 91
K.4.4 Utilization categories for switching elements . 91
K.5 Product information . 91
– 6 – IEC 60947-5-1:2016 © IEC 2016
K.5.2 Marking . 91
K.5.4 Additional information . 91
K.6 Normal service, mounting and transport conditions . 92
K.7 Constructional and performance requirements . 92
K.8 Tests . 93
Annex L (normative) Special requirements for mechanically linked contact elements . 96
L.1 General . 96
L.2 Terms and definitions . 96
L.3 Classification . 96
L.4 Characteristics . 96
L.5 Product information . 96
L.6 Normal service, mounting and transport conditions . 97
L.7 Constructional and performance requirements . 97
L.8 Tests . 97
L.8.4 Special test for mechanically linked contact elements . 98
Annex M (normative) Terminal marking, distinctive number and distinctive letter for
control circuit devices . 99
M.1 Scope . 99
M.2 Terminal marking rule . 99
M.2.1 General . 99
M.2.2 Function digit . 99
M.2.3 Sequence digit . 99
M.2.4 Numbering method . 100
M.3 Distinctive number and distinctive letter . 100
M.3.1 General . 100
M.3.2 Distinctive number . 100
M.3.3 Distinctive letter . 100
M.4 Terminal numbering sequence . 100
M.5 Contactor relays designated by the distinctive letter E . 101
M.6 Contactor relays designated by distinctive letters X, Y or Z . 103
M.6.1 Contactor relays designated by the distinctive letter Z . 103
M.6.2 Contactor relays designated by the distinctive letter X . 103
M.6.3 Contactor relays designated by the distinctive letter Y . 103
Annex N (normative) Procedure to determine reliability data for electromechanical
devices in control circuits used in functional safety applications . 104
N.1 General . 104
N.1.1 Overview . 104
N.1.2 Scope and object . 104
N.1.3 General requirements . 104
N.2 Terms, definitions and symbols . 104
N.3 Method based on durability test results . 104
N.3.1 General method . 104
N.3.2 Test requirements . 104
N.3.3 Number of samples . 105
N.3.4 Characterization of a failure mode . 105
N.3.5 Weibull modelling . 105
N.3.6 Useful life and upper limit of failure rate . 105
N.3.7 Reliability data . 105
N.4 Data information. 105
N.5 Example . 105
Bibliography . 106
Figure 1 – Examples of the recommended method for drawing an operating diagram of
a rotary switch . 55
Figure 2 – Operation of push-buttons . 56
Figure 3 – Difference e between the over-travel of the actuator and that of the contact
element . 56
Figure 4 – Examples of contact elements (schematic sketches) . 57
Figure 5 – Test circuits for multi-pole control switches – Contacts of same polarity, not
electrically separated . 58
Figure 6 – Test circuits for multi-pole control switches – Contacts of opposite polarity,
and electrically separated . 58
Figure 7 – Load L details for test conditions requiring different values of make and
d
break current and/or power factor (time constant) . 59
Figure 8 – Test circuit, conditional short-circuit current (see 8.3.4.2) . 59
Figure 9 – Current/time limits for d.c. test loads (see 8.3.3.5.4) . 60
Figure 10 – Voltage drop measurement at contact point of the clamping unit or terminal . 60
Figure B.1 – Construction of load for d.c. contacts . 64
Figure C.1 – Normal circuit (see C.3.2.2) . 68
Figure C.2 – Simplified circuit (see C.3.2.2) . 68
Figure F.1 – Insulation by encapsulation . 72
Figure F.2 – Test apparatus . 73
Figure H.1 – Relationship between U and U . 79
e B
Figure H.2 – Example of test circuit for the verification of voltage drop, minimum
operational current and OFF-state current (see H.8.2, H.8.3 and H.8.4) . 81
Figure H.3 – Short-circuit testing (see H.8.6.1) . 82
Figure J.1 – Mounting dimensions for indicating tower socket . 86
Figure J.2 – Mounting dimensions for temperature rise tests . 87
Figure K.1 – Verification of robustness of the actuating system . 95
Figure L.1 – Example of representation of NO and NC contacts which are mechanically
linked and NC non-linked contact . 97
Figure L.2 – Symbol for device containing mechanically linked contacts . 97
Table 1 – Utilization categories for switching elements . 29
Table 2 – Mounting hole diameter and dimensions of the key recess (if any) . 32
Table 3 – Preferred minimum distances between centres of mounting holes . 33
Table 4 – Verification of making and breaking capacities of switching elements under
normal conditions corresponding to the utilization categories . 39
Table 5 – Verification of making and breaking capacities of switching elements under
abnormal conditions corresponding to the utilization categories . 40
Table 6 – Test conditions for glow-wire test . 40
Table 7 – Acceptance criteria . 41
Table 8 – Immunity tests . 42
Table 9 – Test values for electrical performance and ageing test of screwless-type
clamping units . 54
– 8 – IEC 60947-5-1:2016 © IEC 2016
Table A.1 – Examples of contact rating designation based on utilization categories . 61
Table A.2 – Examples of semiconductors switching element ratings for 50 Hz and/or 60 Hz . 62
Table A.3 – Examples of semiconductors switching element ratings for d.c. . 62
Table B.1 – DC loads . 64
Table C.1 – Making and breaking conditions for electrical durability . 67
Table M.1 – Diagrams of control switches. 101
Table M.2 – Diagrams of contactor relays designated by the distinctive letter E . 102
Table M.3 – Diagrams of contactor relays designated by the distinctive letter Y . 103
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-1: Control circuit devices and switching elements –
Electromechanical control circuit devices
FOREWORD
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International Standard IEC 60947-5-1 has been prepared by subcommittee 121A: Low-voltage
switchgear and controlgear, of IEC technical committee 121: Switchgear and controlg
...
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