oSIST prEN IEC 62052-31:2023
(Main)Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests
Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests
Wechselstrom-Elektrizitätszähler - Allgemeine Anforderungen, Prüfungen und Prüfbedingungen - Teil 31: Sicherheitsanforderungen und Prüfungen
Équipement de comptage de l'électricité (CA) - Exigences générales, essais et conditions d'essai - Partie 31: Exigences et essais sur la sécurité de produit
Oprema za merjenje električne energije (izmenični tok) - Splošne zahteve, preskusi in pogoji preskušanja - 31. del: Varnostne zahteve in preskusi proizvodov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62052-31:2023
01-maj-2023
Oprema za merjenje električne energije (izmenični tok) - Splošne zahteve, preskusi
in pogoji preskušanja - 31. del: Varnostne zahteve in preskusi proizvodov
Electricity metering equipment (AC) - General requirements, tests and test conditions -
Part 31: Product safety requirements and tests
Wechselstrom-Elektrizitätszähler - Allgemeine Anforderungen, Prüfungen und
Prüfbedingungen - Teil 31: Sicherheitsanforderungen und Prüfungen
Équipement de comptage de l'électricité (CA) - Exigences générales, essais et
conditions d'essai - Partie 31: Exigences et essais sur la sécurité de produit
Ta slovenski standard je istoveten z: prEN IEC 62052-31:2023
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
oSIST prEN IEC 62052-31:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN IEC 62052-31:2023
---------------------- Page: 2 ----------------------
oSIST prEN IEC 62052-31:2023
13/1885/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62052-31 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-03-10 2023-06-02
SUPERSEDES DOCUMENTS:
13/1786/RR, 13/1848/CD
IEC TC 13 : ELECTRICAL ENERGY MEASUREMENT AND CONTROL
SECRETARIAT: SECRETARY:
Hungary Mr Bela Bodi
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 66,TC 85
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,
• any relevant “in some countries” clauses to be included should this proposal proceed. Recipients are
reminded that the enquiry stage is the final stage for submitting "in some countries" clauses. See
AC/22/2007.
TITLE:
Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31:
Product safety requirements and tests
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
Copyright © 2023 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.
---------------------- Page: 3 ----------------------
oSIST prEN IEC 62052-31:2023
– 2 – IEC 62052-31:2023 © IEC 2023
1 CONTENTS
2
3 FOREWORD . 9
4 INTRODUCTION . 11
5 1 Scope and object . 12
6 1.1 Scope . 12
7 1.2 Object . 14
8 1.2.1 Aspects included in scope . 14
9 1.2.2 Aspects excluded from scope . 14
10 1.3 Verification. 14
11 1.4 Environmental conditions . 14
12 1.4.1 Normal environmental conditions . 14
13 1.4.2 Extended environmental conditions . 15
14 1.4.3 Extreme environmental conditions . 15
15 2 Normative references . 15
16 3 Terms and definitions . 17
17 3.1 Equipment and states of equipment . 17
18 3.2 Parts, accessories, and functional elements . 18
19 3.3 Quantities . 23
20 3.4 Tests . 26
21 3.5 Safety terms . 26
22 3.6 Insulation . 30
23 3.7 Terms related to switches of metering equipment . 34
24 4 Tests . 36
25 4.1 General . 36
26 4.2 Type test – sequence of tests . 37
27 4.3 Reference test conditions. 38
28 4.3.1 Atmospheric conditions . 38
29 4.3.2 State of the equipment . 38
30 4.4 Testing in single fault condition . 42
31 4.4.2 Application of fault conditions . 42
32 4.4.3 Duration of tests . 44
33 4.4.4 Conformity after application of fault conditions . 44
34 5 Information and marking requirements . 45
35 5.1 General . 45
36 5.2 Labels, signs and signals . 49
37 5.2.1 General . 49
38 5.2.2 Durability of markings . 50
39 5.3 Information for selection . 51
40 5.3.1 General . 51
41 5.3.2 General information . 51
42 5.3.3 Information specific for meters . 51
43 5.3.4 Information specific for stand-alone tariff and load control equipment . 52
44 5.3.5 Information related to supply control and LCSs . 52
45 5.4 General information for installation and commissioning . 52
46 5.4.1 General . 52
Internal
---------------------- Page: 4 ----------------------
oSIST prEN IEC 62052-31:2023
IEC 62052-31:2022 © IEC 2023 – 3 –
47 5.4.2 Handling and mounting . 52
48 5.4.3 Enclosure . 53
49 5.4.4 Connections . 53
50 5.4.5 Auxiliary power supply . 55
51 5.4.6 Supply for external devices . 56
52 5.4.7 Self-consumption . 56
53 5.4.8 Self-consumption . 56
54 5.5 General information for use . 57
55 5.5.1 General . 57
56 5.5.2 Display, push buttons and other controls . 57
57 5.5.3 Switches . 57
58 5.5.4 Connection to user’s equipment . 57
59 5.6 General information for maintenance . 57
60 5.6.1 Maintenance instructions . 57
61 5.6.2 Cleaning . 58
62 5.6.3 Batteries . 58
63 6 Protection against electrical shock . 58
64 6.1 General requirements . 58
65 6.2 Determination of accessible parts . 59
66 6.2.1 General . 59
67 6.2.2 Examination . 59
68 6.2.3 Openings above parts that are hazardous live . 60
69 6.2.4 Openings for pre-set controls . 60
70 6.2.5 Wiring terminals . 60
71 6.3 Limit values for accessible parts . 61
72 6.3.1 General . 61
73 6.3.2 Levels in normal condition . 61
74 6.3.3 Levels in single fault condition . 61
75 6.4 Primary means of protection (protection against direct contact) . 64
76 6.4.1 General . 64
77 6.4.2 Equipment case . 64
78 6.4.3 Basic insulation . 64
79 6.4.4 Impedance . 64
80 6.5 Additional means of protection in case of single fault conditions (protection
81 against indirect contact) . 65
82 6.5.1 General . 65
83 6.5.2 Protective bonding . 65
84 6.5.3 Supplementary insulation and reinforced insulation . 68
85 6.5.4 Protective impedance . 69
86 6.5.5 Automatic disconnection of the supply . 69
87 6.5.6 Current or voltage limiting device . 70
88 6.6 Connection to external circuits . 70
89 6.6.1 General . 70
90 6.6.2 Terminals for external circuits . 70
91 6.6.3 Terminals for stranded conductors . 71
92 6.7 Insulation requirements . 71
93 6.7.1 General – electric stresses, overvoltages and working voltages . 71
94 6.7.2 The nature of insulation . 74
95 6.7.3 Insulation requirements for mains circuits . 77
Internal
---------------------- Page: 5 ----------------------
oSIST prEN IEC 62052-31:2023
– 4 – IEC 62052-31:2023 © IEC 2023
96 6.7.4 Insulation requirements for non-mains circuits . 85
97 6.7.5 Insulation in circuits with special voltage values not addressed in 6.7.3
98 or 6.7.4 . 91
99 6.7.6 Reduction of transient overvoltages by the use of overvoltage limiting
100 devices . 97
101 6.7.7 Insulation requirements between circuits and parts . 97
102 6.8 Constructional requirements for protection against electric shock . 100
103 6.8.1 General . 100
104 6.8.2 Insulating materials . 101
105 6.8.3 Colour coding . 101
106 6.8.4 Equipment case . 101
107 6.8.5 Terminal blocks . 102
108 6.8.6 Insulating materials of SCS and LCSs . 102
109 6.8.7 Terminals . 102
110 6.8.8 Requirements for current circuits . 105
111 6.9 Safety related electrical tests . 112
112 6.9.1 Overview . 112
113 6.9.2 Test conditions . 115
114 6.9.3 Dielectric test methods . 116
115 6.9.4 Dielectric testing on complete equipment . 119
116 6.9.5 Dielectric tests on sub-assemblies . 125
117 6.9.6 Electrical tests on current circuits of direct connected meters without
118 SCSs . 130
119 6.9.7 Electrical tests on current circuits of direct connected meters with SCSs . 131
120 6.9.8 Electrical tests on LCSs . 137
121 6.9.9 Cemented joints test . 140
122 6.9.10 Thermal cycling . 140
123 7 Protection against mechanical hazards . 141
124 7.1 General . 141
125 7.2 Sharp edges . 141
126 7.3 Provisions for lifting and carrying . 141
127 7.4 Wall mounting . 142
128 8 Resistance to mechanical stresses . 142
129 8.1 General . 142
130 8.2 Spring hammer test . 142
131 9 Protection against spread of fire . 143
132 9.1 General . 143
133 9.2 Eliminating or reducing the sources of ignition within the equipment . 144
134 9.3 Containment of fire within the equipment, should it occur . 144
135 9.3.1 General . 144
136 9.3.2 Construction requirements . 145
137 9.4 Limited-energy circuit . 146
138 9.5 Overcurrent protection . 147
139 10 Equipment temperature limits and resistance to heat . 147
140 10.1 Surface temperature limits for protection against burns . 147
141 10.2 Temperature limits for terminals . 148
142 10.3 Temperatures of internal parts . 149
143 10.4 Temperature test . 151
144 10.5 Resistance to heat . 153
Internal
---------------------- Page: 6 ----------------------
oSIST prEN IEC 62052-31:2023
IEC 62052-31:2022 © IEC 2023 – 5 –
145 10.5.1 Non-metallic enclosures . 153
146 10.5.2 Insulating materials . 153
147 11 Protection against penetration of dust and water . 153
148 11.1 General . 153
149 11.2 Test for protection against ingress of dust and foreign objects . 154
150 11.3 Test for protection against ingress of water . 154
151 12 Protection against liberated gases and substances explosion and implosion . 155
152 12.1 Batteries and battery charging . 155
153 12.1.1 Mounting of batteries . 155
154 12.1.2 Battery circuits . 155
155 12.1.3 Tests related to batteries and charging circuits . 156
156 13 Components and sub-assemblies . 157
157 13.1 General . 157
158 13.2 Mains transformers tested outside equipment . 158
159 13.3 Printed wiring boards . 158
160 13.4 Components bridging insulation . 159
161 13.5 Surge protective circuits (SPCs, transient overvoltage limiting circuits) . 159
162 13.5.1 General use of SPCs . 159
163 13.5.2 SPD overheating test . 160
164 13.6 Capacitors . 161
165 14 Hazards resulting from application – Reasonably foreseeable misuse . 161
166 15 Risk assessment . 161
167 Annex A (normative) Measuring circuits for touch current . 163
168 A.1 Measuring circuit for AC with frequencies up to 1 MHz and for DC . 163
169 A.2 Measuring circuits for sinusoidal AC with frequencies up to 100 Hz and for
170 DC . 164
171 A.3 Current measuring circuit for electrical burns at high frequencies . 164
172 A.4 Current measuring circuit for wet location . 165
173 Annex B (informative) Examples for insulation between parts . 166
174 B.1 Example of a meter protected by reinforced insulation . 166
175 B.2 Example of a meter protected by double insulation . 167
176 Annex C (informative) Examples for direct connected meters equipped with supply
177 control and LCSs . 169
178 Annex D (normative) Test circuit diagram for the test of long-term overvoltage
179 withstand . 171
180 Annex E (normative) Test circuit diagram for short current test on the current circuit of
181 direct connected meters . 172
182 Annex F (informative) Examples of voltage tests . 175
183 F.1 Example of a directly connected meter with SCSs . 175
184 F.2 Example of a transformer operated meter with auxiliary power supply . 177
185 F.3 Example of an LPCT-operated meter with direct voltage connections . 182
186 Annex G (normative) Additional AC voltage tests for electromechanical meters . 185
187 Annex H (normative) Test equipment for cable flexion and pull test . 186
188 Annex I (normative) Routine tests . 188
189 I.1 General . 188
190 I.2 Protective earth . 188
191 I.3 High-voltage test for mains circuits . 188
Internal
---------------------- Page: 7 ----------------------
oSIST prEN IEC 62052-31:2023
– 6 – IEC 62052-31:2023 © IEC 2023
192 I.4 Mains circuits with voltage limiting devices . 189
193 Annex J (informative) Examples of battery protection . 190
194 Annex K (informative) Transient overvoltage requirements in TC 13 standards . 191
195 Annex L (informative) Electricity meters in LVDC systems . 192
196 Annex M (informative) Component standards . 194
197 Bibliography . 196
198
199 Figure 1 – Measurements through openings in enclosures . 60
200 Figure 2 – Capacitance level versus voltage in normal condition and single fault
201 condition (see 6.3.2 c) and 6.3.3 c)) . 63
202 Figure 3 – Maximum duration of short-term accessible voltages in single fault
203 condition (see 6.3.3 a)) . 63
204 Figure 4 – Acceptable arrangements of protection means against electric shock . 65
205 Figure 5 – Examples of binding screw assemblies . 67
206 Figure 6 – Distance between conductors on an interface between two layers . 83
207 Figure 7 – Distance between adjacent conductors along an interface of an inner layer . 83
208 Figure 8 – Distance between adjacent conductors located between the same two
209 layers. 85
210 Figure 9 – Example of recurring peak voltage . 95
211 Figure 10 – Flowchart of safety related electrical tests . 113
212 Figure 11 – Flowchart of safety related electrical tests – continued . 114
213 Figure 12 – Flowchart to explain the requirements for protection against the spread of
214 fire 144
215 Figure 13 – Flowchart for conformity options 13.1 a), b), c) and d) . 158
216 Figure A.1 – Measuring circuit for AC with frequencies up to 1 MHz and for DC . 163
217 Figure A.2 – Measuring circuits for sinusoidal AC with frequencies up to 100 Hz and
218 for DC . 164
219 Figure A.3 – Current measuring circuit for electrical burns . 165
220 Figure A.4 – Current measuring circuit for wet location . 165
221 Figure B.1 – Insulation between parts – example of a meter protected by reinforced
222 insulation . 166
223 Figure B.2 – Insulation between parts – example of a meter protected by double
224 insulation . 168
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.