prEN IEC 60947-4-1:2022
(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
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
Nizkonapetostne stikalne in krmilne naprave - 4-1. del: Kontaktorji in motorski zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 60947-4-1:2022
01-oktober-2022
Nizkonapetostne stikalne in krmilne naprave - 4-1. del: Kontaktorji in motorski
zaganjalniki - Elektromehanski kontaktorji in motorski zaganjalniki
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters
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
Ta slovenski standard je istoveten z: prEN IEC 60947-4-1:2022
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
oSIST prEN IEC 60947-4-1:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 60947-4-1:2022
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oSIST prEN IEC 60947-4-1:2022
121A/509/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60947-4-1 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-07-22 2022-10-14
SUPERSEDES DOCUMENTS:
121A/480/CD, 121A/498A/CC
IEC SC 121A : LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR
SECRETARIAT: SECRETARY:
France Mr Michaël LAHEURTE
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 2,TC 22,SC 22G,SC 23E,TC 31,TC 61,SC
121B
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
TITLE:
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters
PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
SC121A Officers support circulation of CDV for project IEC 60947-4-1 ED5.
Secretary note: NCs are kindly requested to refer their comments to line numbers.
Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing
National Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part
of it, for any other purpose without permission in writing from IEC.
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oSIST prEN IEC 60947-4-1:2022
IEC CDV 60947-4-1 © IEC 2022 2 121A/509/CDV
1 CONTENTS
2 CONTENTS . 1
3 FOREWORD. 10
4 1. Scope . 13
5 2. Normative references . 13
6 3. Terms, definitions, symbols and abbreviated terms . 15
7 3.1 General . 15
8 3.2 Alphabetical index of terms . 15
9 3.3 Terms and definitions concerning contactors . 17
10 3.4 Terms and definitions concerning starters . 19
11 3.5 Terms and definitions concerning characteristic quantities . 24
12 3.6 Terms and definitions concerning safety aspects . 26
13 3.7 Symbols and abbreviated terms . 27
14 4. Classification . 28
15 5. Characteristics of contactors and starters . 28
16 5.1 Summary of characteristics . 28
17 5.2 Type of equipment . 29
18 5.2.1 Kind of equipment . 29
19 5.2.2 Number of poles . 29
20 5.2.3 Kind of current (AC or DC) . 29
21 5.2.4 Interrupting medium (air, oil, gas, vacuum, etc.) . 29
22 5.2.5 Operating conditions of the equipment . 29
23 5.2.6 Methods of overload protection of motors . 30
24 5.3 Rated and limiting values for main circuits . 30
25 5.3.1 Rated voltages . 30
26 5.3.2 Currents or powers . 31
27 5.3.3 Rated frequency. 33
28 5.3.4 Rated duties . 33
29 5.3.5 Normal load and overload characteristics . 34
30 5.3.6 Short-circuit characteristics . 36
31 5.3.7 Pole impedance of a contactor (Z) or starter . 36
32 5.4 Utilization category. 36
33 5.4.1 General . 36
34 5.4.2 Assignment of utilization categories based on the results of tests . 37
35 5.5 Control circuits . 38
36 5.6 Auxiliary circuits . 39
37 5.7 Characteristics of relay and release of overload relays and of motor
38 protective switching device (MPSD) . 39
39 5.7.1 Summary of characteristics . 39
40 5.7.2 Types of relay or release . 39
41 5.7.3 Characteristic values . 40
42 5.7.4 Designation and current settings of overload relays . 41
43 5.7.5 Time-current characteristics of overload relays . 41
44 5.7.6 Influence of ambient air temperature . 42
45 5.8 Co-ordination with short-circuit protective devices . 42
46 5.9 Void . 42
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47 5.10 Types and characteristics of automatic change-over devices and automatic
48 acceleration control devices . 42
49 5.10.1 Types . 42
50 5.10.2 Characteristics . 42
51 5.11 Types and characteristics of auto-transformers for two-step auto-transformer
52 starters . 43
53 5.12 Types and characteristics of starting resistors for rheostatic rotor starters . 43
54 6. Product documentation . 43
55 6.1 Nature of information . 43
56 6.1.1 Identification . 43
57 6.1.2 Characteristics, basic rated values and utilization . 44
58 6.2 Marking . 46
59 6.3 Instructions for installation, operation, maintenance, decommissioning and
60 dismantling . 46
61 6.4 Environmental information . 47
62 6.5 Equipment capable to be reused, repaired and upgraded . 47
63 7. Normal service, mounting and transport conditions . 48
64 8. Constructional and performance requirements . 48
65 8.1 Constructional requirements . 48
66 8.1.1 General . 48
67 8.1.2 Materials . 49
68 8.1.3 Current-carrying parts and their connections . 49
69 8.1.4 Clearances and creepage distances . 49
70 8.1.5 Actuator . 50
71 8.1.6 Indication of the contact position . 50
72 8.1.7 Additional requirements for equipment suitable for isolation . 50
73 8.1.8 Terminals . 50
74 8.1.9 Additional requirements for equipment provided with a neutral pole . 50
75 8.1.10 Provisions for protective earthing . 50
76 8.1.11 Enclosures for equipment . 51
77 8.1.12 Degrees of protection of enclosed equipment . 51
78 8.1.13 Conduit pull-out, torque and bending with metallic conduits . 51
79 8.1.14 Limited energy source . 51
80 8.1.15 Stored charge energy circuit . 53
81 8.1.16 Fault and abnormal conditions . 53
82 8.1.17 Short-circuit and overload protection of ports . 54
83 8.1.18 Use of voltage transient limiting device . 54
84 8.2 Performance requirements . 54
85 8.2.1 Operating conditions . 54
86 8.2.2 Temperature-rise . 60
87 8.2.3 Dielectric properties . 63
88 8.2.4 Normal load and overload performance requirements . 63
89 8.2.5 Co-ordination with short-circuit protective devices . 69
90 8.3 Electromagnetic compatibility (EMC) . 72
91 8.3.1 General . 72
92 8.3.2 Immunity . 72
93 8.3.3 Emission . 73
94 8.4 Embedded software. 73
95 8.5 Security . 73
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96 9. Tests . 73
97 9.1 Kinds of test . 73
98 9.1.1 General . 73
99 9.1.2 Type tests . 73
100 9.1.3 Routine tests . 73
101 9.1.4 Sampling tests . 74
102 9.1.5 Special tests . 74
103 9.2 Compliance with constructional requirements . 75
104 9.2.1 General . 75
105 9.2.2 Electrical performance of screwless-type clamping units . 75
106 9.2.3 Ageing test for screwless-type clamping units . 76
107 9.2.4 Limited energy source test . 76
108 9.2.5 Breakdown of components . 77
109 9.2.6 Wire flexing test . 77
110 9.3 Compliance with performance requirements . 78
111 9.3.1 Test sequences. 78
112 9.3.2 General test conditions . 78
113 9.3.3 Performance under no load, normal load and overload conditions . 79
114 9.3.4 Performance under short-circuit conditions . 92
115 9.3.5 Overload current withstand capability of contactors and IMPSDs . 97
116 9.3.6 Routine tests and sampling tests . 97
117 9.4 EMC tests . 99
118 9.4.1 General . 99
119 9.4.2 Immunity . 99
120 9.4.3 Emission . 101
121 Annex A (normative) Marking and identification of terminals of contactors, starters and
122 associated overload relays . 103
123 A.1 General . 103
124 A.2 Marking and identification of terminals of main circuits . 103
125 A.3 Marking and identification of terminals of overload relays . 103
126 Annex B (normative) Special tests . 105
127 B.1 General . 105
128 B.2 Mechanical durability . 105
129 B.2.1 General . 105
130 B.2.2 Verification of mechanical durability . 105
131 B.3 Electrical durability . 107
132 B.3.1 General . 107
133 B.3.2 Results to be obtained . 108
134 B.3.3 Statistical analysis of test results for contactors or starters . 108
135 B.4 Co-ordination at the crossover current between the starter and associated
136 SCPD . 109
137 B.4.1 General and definitions . 109
138 B.4.2 Condition for the test for the verification of co-ordination at the
139 crossover current by a direct method . 110
140 B.4.3 Test currents and test circuits. 110
141 B.4.4 Test procedure and results to be obtained . 110
142 B.4.5 Verification of co-ordination at the crossover current by an indirect
143 method . 110
144 Annex C (informative) Motor starting methods including IE3 and IE4 motor starting
145 (AC-3e) . 113
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146 C.1 General . 113
147 C.1.1 Major changes on the market concerning electrical motors . 113
148 C.1.2 Definitions . 114
149 C.1.3 Efficiency motor analysis . 114
150 C.1.4 Impacts on switchgear and controlgear . 116
151 C.2 Typical variants direct-on-line starters . 117
152 C.3 Functional aspects of motor starters . 119
153 C.4 Currents and torques during a star-delta start . 121
154 C.5 Currents and torques during an auto-transformer start . 123
155 C.6 Currents waveform of the different modes of operation of a starter . 125
156 Annex D (informative) Items subject to agreement between manufacturer and user . 127
157 Annex E (Void) . 128
158 Annex F (normative) Requirements for auxiliary contact linked with power contact
159 (mirror contact) . 129
160 F.1 Application and object . 129
161 F.1.1 Application . 129
162 F.1.2 Object . 129
163 F.2 Terms and definitions . 129
164 F.3 Characteristics . 129
165 F.4 Product information . 129
166 F.5 Normal service, mounting and transport conditions . 130
167 F.6 Constructional and performance requirements . 130
168 F.7 Tests . 130
169 F.7.1 General . 130
170 F.7.2 Tests on products in a new condition . 130
171 F.7.3 Test after conventional operational performance (defined under Table
172 10) . 131
173 Annex G (informative) Rated operational currents and rated operational powers of
174 switching devices for electrical motors . 132
175 G.1 General . 132
176 G.2 Rated operational powers and rated operational currents . 132
177 Annex H (normative) Extended functions to electronic overload relays . 136
178 H.1 General . 136
179 H.2 Terms and definitions . 136
180 H.3 Limits of operation of control functions . 136
181 H.3.1 General . 136
182 H.3.2 Limits of electronic overload relay with main circuit under-voltage
183 restarting function . 136
184 H.4 Test of the control functions . 137
185 Annex I (informative) AC-1 contactors for use with semiconductor controlled motor
186 load . 138
187 Annex J (Void) . 139
188 Annex K (normative) Procedure to determine data for electromechanical contactors
189 used in functional safety applications . 140
190 K.1 General . 140
191 K.2 Test requirements . 140
192 K.3 Characterization of a failure mode . 140
193 K.4 Failure ratios of a contactor . 140
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194 Annex L (normative) Assessment procedure for electromechanical overload protection
195 used in safety applications and especially in explosive atmospheres . 142
196 L.1 Application and object . 142
197 L.1.1 Application . 142
198 L.1.2 Object . 142
199 L.2 Terms, definitions and symbols . 142
200 L.2.1 Terms and definitions . 142
201 L.2.2 Symbols and abbreviations . 143
202 L.3 Procedure . 144
203 L.3.1 General . 144
204 L.3.2 Safety design process . 144
205 L.4 Requirements . 145
206 L.4.1 General . 145
207 L.4.2 Safety plan . 145
208 L.4.3 Design . 146
209 L.4.4 Failure mode and effects analysis of the safety function . 146
210 L.4.5 Design plan . 147
211 L.4.6 Verification . 147
212 L.4.7 Function assessed . 147
213 L.5 Documentation . 147
214 L.5.1 Technical safety documentation . 147
215 L.5.2 Safety instructions . 147
216 L.6 Example . 148
217 L.6.1 architecture description . 148
218 L.6.2 FMEA . 149
219 Annex M (normative) DC contactors for use in photovoltaic (PV) applications . 157
220 M.1 Application . 157
221 M.2 Object . 157
222 M.3 Terms and definitions . 157
223 M.4 Classification . 157
224 M.5 Characteristics . 158
225 M.5.1 General . 158
226 M.5.2 Rated impulse withstand voltag
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