oSIST prEN IEC 62477-1:2021
(Main)Safety requirements for power electronic converter systems and equipment - Part 1: General
Safety requirements for power electronic converter systems and equipment - Part 1: General
Sicherheitsanforderungen an Leistungshalbleiter-Umrichtersysteme und -betriebsmittel - Teil 1: Allgemeines
Exigences de sécurité applicables aux systèmes et matériels électroniques de conversion de puissance - Partie 1: Généralités
Varnostne zahteve za močnostno elektroniko pretvorniških sistemov in opreme - 1. del: Splošno
General Information
RELATIONS
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62477-1:2021
01-januar-2021
Varnostne zahteve za močnostno elektroniko pretvorniških sistemov in opreme -
1. del: Splošno
Safety requirements for power electronic converter systems and equipment - Part 1:
GeneralSicherheitsanforderungen an Leistungshalbleiter-Umrichtersysteme und -betriebsmittel -
Teil 1: AllgemeinesExigences de sécurité applicables aux systèmes et matériels électroniques de
conversion de puissance - Partie 1: Généralités
Ta slovenski standard je istoveten z: prEN IEC 62477-1:2020
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
oSIST prEN IEC 62477-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 62477-1:2021
22/325/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62477-1 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2020-10-30 2021-01-22
SUPERSEDES DOCUMENTS:
22/309/CD, 22/315A/CC
IEC TC 22 : POWER ELECTRONIC SYSTEMS AND EQUIPMENT
SECRETARIAT: SECRETARY:
Switzerland Ms Chuanhong Zhao
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 34,TC 61,TC 62,TC 64,TC 66,TC 69,TC 82,
TC 88,TC 96,TC 105,TC 108,TC 109,TC 114,
Other TC/SCs are requested to indicate their interest, if any,
TC 120,TC 121 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 votingThe 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:
Safety requirements for power electronic converter systems and equipment - Part 1: General
PROPOSED STABILITY DATE: 2024NOTE FROM TC/SC OFFICERS:
The comparison version between this CDV and Ed.1.1 is circulated concurrently as 22/326/INF.
Copyright © 2020 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
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1 CONTENTS
3 FOREWORD ......................................................................................................................... 14
4 INTRODUCTION ................................................................................................................... 17
5 1 Scope ............................................................................................................................ 18
6 2 Normative references .................................................................................................... 19
7 3 Terms and definitions .................................................................................................... 21
8 4 Protection against hazards ............................................................................................ 32
9 4.1 General ................................................................................................................. 32
10 4.2 Fault and abnormal operating conditions ............................................................... 32
11 4.3 Short-circuit and overload protection ..................................................................... 33
12 4.3.1 General ......................................................................................................... 33
13 4.3.2 Input short-circuit withstand strength and output short-circuit current14 ability............................................................................................................. 34
15 4.3.2.1 General ....................................................................................... 34
16 4.3.2.2 Conditional short-circuit current (I ) on input ports .................... 35
17 4.3.2.3 Short time withstand current (Icw) on input ports .......................... 35
18 4.3.2.4 Output short-circuit current ability ............................................... 35
19 4.3.2.5 Combined input and output ports ................................................ 35
20 4.3.3 Short-circuit coordination (backup protection) ................................................ 35
21 4.3.4 Protection by several devices ........................................................................ 36
22 4.4 Protection against electric shock ........................................................................... 36
23 4.4.1 General ......................................................................................................... 36
24 4.4.2 Decisive voltage class ................................................................................... 38
25 4.4.2.1 General ....................................................................................... 38
26 4.4.2.2 DVC As ....................................................................................... 39
27 4.4.2.3 DVC B ......................................................................................... 39
28 4.4.2.4 DVC C ........................................................................................ 39
29 4.4.2.5 Connection to external circuits .................................................... 39
30 4.4.2.6 Determination of decisive voltage class (DVC) ............................ 39
31 4.4.2.7 Requirements for protection against electric shock ..................... 40
32 4.4.3 Provision for basic protection (protection against direct contact) .................... 41
33 4.4.3.1 General ....................................................................................... 41
34 4.4.3.2 Protection by means of basic insulation of hazardouos live35 parts ........................................................................................... 41
36 4.4.3.3 Protection by means of enclosures or barriers............................. 42
37 4.4.4 Provision for fault protection (protection against indirect contact) .................. 42
38 4.4.4.1 General ....................................................................................... 42
39 4.4.4.2 Protective equipotential bonding (circuit) ..................................... 43
40 4.4.4.3 PE conductor .............................................................................. 47
41 4.4.4.4 Automatic disconnection of supply .............................................. 49
42 4.4.4.5 Supplementary insulation ............................................................ 51
43 4.4.4.6 Basic protection between circuits ................................................ 51
44 4.4.4.7 Electrically protective screening .................................................. 51
45 4.4.5 Provision for enhanced protection .................................................................. 52
46 4.4.5.1 General ....................................................................................... 52
47 4.4.5.2 Double insulation ........................................................................ 52
48 4.4.5.3 Reinforced insulation .................................................................. 52
49 4.4.5.4 Enhanced protection between circuits ......................................... 52
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50 4.4.5.5 Protection by means of protective impedance ............................. 52
51 4.4.6 Protective means for equipment classes ........................................................ 53
52 4.4.6.1 General ....................................................................................... 53
53 4.4.6.2 Protective means for class I equipment ....................................... 53
54 4.4.6.3 Protective means for class II equipment ...................................... 53
55 4.4.6.4 Protective means for class III equipment ..................................... 54
56 4.4.7 Insulation ....................................................................................................... 54
57 4.4.7.1 Influencing factors....................................................................... 54
58 4.4.7.2 Insulation to the surroundings ..................................................... 58
59 4.4.7.3 Functional insulation ................................................................... 61
60 4.4.7.4 Clearance distances.................................................................... 61
61 4.4.7.5 Creepage distances .................................................................... 63
62 4.4.7.6 Coating and potting ..................................................................... 65
63 4.4.7.7 Spacings for functional insulation ................................................ 65
64 4.4.7.8 Solid insulation ........................................................................... 65
65 4.4.7.9 Connection of parts of solid insulation (cemented joints) ............. 68
66 4.4.7.10 Requirements for electrical withstand capability .......................... 69
67 4.4.8 Compatibility with residual current-operated protective devices (RCD) ........... 69
68 4.4.9 Capacitor discharge ....................................................................................... 70
69 4.5 Protection against electrical energy hazards ......................................................... 70
70 4.5.1 General access areas .................................................................................... 70
71 4.5.1.1 General ....................................................................................... 70
72 4.5.1.2 Determination of hazardous electrical energy level ..................... 70
73 4.5.2 Service access areas ..................................................................................... 71
74 4.6 Protection against fire and thermal hazards .......................................................... 71
75 4.6.1 Circuits representing a fire hazard ................................................................. 71
76 4.6.2 Components representing a fire hazard ......................................................... 71
77 4.6.2.1 General ....................................................................................... 71
78 4.6.2.2 Components within a circuit representing a fire hazard ............... 72
79 4.6.2.3 Components within a circuit not representing a fire hazard .......... 73
80 4.6.3 Fire enclosures .............................................................................................. 73
81 4.6.3.1 General ....................................................................................... 73
82 4.6.3.2 Flammability of enclosure materials ............................................ 73
83 4.6.3.3 Openings in fire enclosures ......................................................... 74
84 4.6.4 Temperature limits ......................................................................................... 77
85 4.6.4.1 General ....................................................................................... 77
86 4.6.4.2 Internal parts .............................................................................. 77
87 4.6.4.3 Accessible parts .......................................................................... 79
88 4.6.5 Limited power sources ................................................................................... 80
89 4.7 Protection against mechanical hazards ................................................................. 81
90 4.7.1 General ......................................................................................................... 81
91 4.7.2 Specific requirements for liquid cooled PECS ................................................ 81
92 4.7.2.1 Coolant ....................................................................................... 81
93 4.7.2.2 Design requirements ................................................................... 82
94 4.7.3 Mechanical hazards from rotating parts ......................................................... 83
95 4.7.3.1 General ....................................................................................... 83
96 4.7.3.2 Mechanical hazards caused by fan.............................................. 83
97 4.7.3.3 Expelled parts ............................................................................. 83
98 4.7.4 Sharp edges .................................................................................................. 83
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99 4.8 Equipment with multiple sources of supply ............................................................ 84
100 4.9 Protection against environmental stresses ............................................................ 84
101 4.10 Protection against sonic pressure hazards ............................................................ 85
102 4.10.1 General ......................................................................................................... 85
103 4.10.2 Sonic pressure and sound level (acoustic noise) ........................................... 85
104 4.11 Wiring and connections ......................................................................................... 85
105 4.11.1 General ......................................................................................................... 85
106 4.11.2 Insulation of conductors ................................................................................. 86
107 4.11.2.1 General ....................................................................................... 86
108 4.11.2.2 Accessible wiring system ............................................................ 87
109 4.11.2.3 Conductors of different circuits .................................................... 87
110 4.11.3 Stranded wire ................................................................................................ 87
111 4.11.4 Routing and clamping .................................................................................... 87
112 4.11.5 Identification of conductors and terminals ...................................................... 88
113 4.11.6 Splices and connections ................................................................................ 88
114 4.11.7 Accessible connections ................................................................................. 88
115 4.11.8 Interconnections between parts of the PECS ................................................. 89
116 4.11.9 Supply connections ....................................................................................... 90
117 4.11.9.1 General ....................................................................................... 90
118 4.11.9.2 Mains supply cords ..................................................................... 90
119 4.11.10 Field wiring terminals and internal terminals .................................................. 91
120 4.11.10.1Construction requirements .......................................................... 91
121 4.11.10.2Connecting capacity .................................................................... 91
122 4.11.10.3Connection to external conductors .............................................. 92
123 4.11.10.4Wire bending space for wires 10 mm² and greater ....................... 92
124 4.11.11 Provisions for shield connection of shielded wire or shielded cable ................ 93
125 4.12 Enclosures ............................................................................................................ 93
126 4.12.1 General ......................................................................................................... 93
127 4.12.2 Handles and manual controls ......................................................................... 94
128 4.12.3 Cast metal ..................................................................................................... 94
129 4.12.4 Sheet metal ................................................................................................... 94
130 4.12.5 Stability requirement for enclosure ................................................................ 97
131 4.12.6 Strain relief .................................................................................................... 97
132 4.12.7 Polymeric enclosure stress relief ................................................................... 98
133 4.12.8 Polymeric enclosure UV resistance ................................................................ 98
134 4.13 Components ......................................................................................................... 98
135 4.13.1 General ......................................................................................................... 98
136 4.13.2 PTC thermistors............................................................................................. 99
137 4.13.3 Mains supply cords ........................................................................................ 99
138 4.13.4 Capacitors, RC units and EMC filter bridging insulation ................................. 99
139 4.13.5 Wound components ....................................................................................... 99
140 4.13.6 Plug and socket-outlets ................................................................................. 99
141 4.14 Protection against electromagnetic fields .............................................................. 99
142 5 Test requirements.......................................................................................................... 99
143 5.1 General ................................................................................................................. 99
144 5.1.1 Test objectives and classification ................................................................... 99
145 5.1.2 Selection of test samples ............................................................................. 100
146 5.1.3 Sequence of tests ........................................................................................ 100
147 5.1.4 Earthing conditions ...................................................................................... 100
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148 5.1.5 General conditions for tests ......................................................................... 100
149 5.1.5.1 Application of tests.................................................................... 100
150 5.1.5.2 Test samples ............................................................................ 100
151 5.1.5.3 Operating parameters for tests .................................................. 100
152 5.1.5.4 Mounting ................................................................................... 101
153 5.1.5.5 Representative tests ................................................................. 101
154 5.1.6 Compliance ................................................................................................. 101
155 5.1.7 Test overview .............................................................................................. 101
156 5.2 Test specifications .............................................................................................. 104
157 5.2.1 Visual inspection (type test, sample test and routine test) ............................ 104
158 5.2.2 Mechanical tests .......................................................................................... 104
159 5.2.2.1 Clearances and creepage distances test (type test) .................. 104
160 5.2.2.2 Non-accessibility test (type test) ............................................... 104
161 5.2.2.3 Ingress protection test (IP rating) (type test) ............................. 105
162 5.2.2.4 Enclosure integrity test (type test) ............................................. 107
163 5.2.2.5 Stability test (type test) ............................................................. 110
164 5.2.2.6 Wall or ceiling mounted equipment test (type test) .................... 110
165 5.2.2.7 Handles and manual controls securement test .......................... 110
166 5.2.2.8 Strain relief test (type test) ........................................................ 111
167 5.2.3 Electrical tests ............................................................................................. 112
168 5.2.3.1 General ..................................................................................... 112
169 5.2.3.2 Impulse withstand voltage test (type test, sample test) .............. 112
170 5.2.3.3 Alternative to impulse withstand voltage test (type test,171 sample test) .............................................................................. 114
172 5.2.3.4 AC or DC voltage test (type test, routine test) ........................... 114
173 5.2.3.5 Partial discharge test (type test, sample test) ............................ 119
174 5.2.3.6 Protective impedance test (type test, routine test) ..................... 120
175 5.2.3.7 Touch current measurement test (type test) .............................. 121
176 5.2.3.8 Capacitor discharge test (type test) ........................................... 121
177 5.2.3.9 Limited power source test (type test) ......................................... 121
178 5.2.3.10 Temperature rise test (type test) ............................................... 122
179 5.2.3.11 Protective equipotential bonding tests (type tests, routine180 test) .......................................................................................... 123
181 5.2.3.12 Input test (type test) .................................................................. 126
182 5.2.3.13 Thin sheet material test (type test) ............................................ 127
183 5.2.3.14 Determination of working voltage (type test).............................. 130
184 5.2.3.15 Internal SPD monitoring test (type tests) ................................... 130
185 5.2.3.16 Preconditioning of material (type test) ....................................... 130
186 5.2.4 Abnormal operation and simulated faults tests ............................................. 131
187 5.2.4.1 General ..................................................................................... 131
188 5.2.4.2 Acceptance criteria ................................................................... 131
189 5.2.4.3 Protective equipotential bonding test (type test) ........................ 132
190 5.2.4.4 Output short-circuit test (type test) ............................................ 133
191 5.2.4.5 Output overload test (type test) ................................................. 134
192 5.2.4.6 Breakdown of components test (type test) ................................. 135
193 5.2.4.7 Material short-circuit test (type test) .......................................... 135
194 5.2.4.8 Loss of phase test (type test) .................................................... 135
195 5.2.4.9 Cooling failure tests (type tests) ................................................ 136
196 5.2.5 Material tests ............................................................................................... 137
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197 5.2.5.1 General ..................................................................................... 137
198 5.2.5.2 High current arcing ignition test (type test) ................................ 137
199 5.2.5.3 Glow-wire test (type test) .......................................................... 138
200 5.2.5.4 Hot wire ignition test (type test) ................................................. 138
201 5.2.5.5 Flammability test (type test) ...................................................... 139
202 5.2.5.6 Flaming oil test (type test) ......................................................... 139
203 5.2.5.7 Cemented joints test (type test)................................................. 140
204 5.2.5.8 Durability, legibility and permanence of marking test (type205 test) .......................................................................................... 140
206 5.2.5.9 UV resistance test (type test) .................................................... 141
207 5.2.6 Environmental tests (type tests) ................................................................... 141
208 5.2.6.1 General ..................................................................................... 141
209 5.2.6.2 Acceptance criteria ................................................................... 142
210 5.2.6.3 Climatic tests ............................................................................ 142
211 5.2.6.4 Vibration test (type test) ............................................................ 143
212 5.2.6.5 Salt mist test (type test) ............................................................ 144
213 5.2.6.6 Dust test (type test)................................................................... 144
214 5.2.6.7 Sand test (type test) .................................................................. 145
215 5.2.7 Hydrostatic pressure test (type test, routine test) ......................................... 145
216 5.2.8 Electromagnetic fields (EMF) ....................................................................... 145
217 6 Information and marking requirements ......................................................................... 146
218 6.1 General ............................................................................................................... 146
219 6.2 Information for selection ..................................................................................... 148
220 6.2.1 General ....................................................................................................... 148
221 6.2.1.1 Identifying the product: ............................................................. 148
222 6.2.1.2 Electrical ratings for each port: ................................................. 148
223 6.2.1.3 Supplementary information for each port: .................................. 148
224 6.2.1.4 Liquid cooled PECS; ................................................................. 149
225 6.2.1.5 General PECS marking; ............................................................ 149
226 6.2.2 Instructions and markings pertaining to accessories .................................... 149
227 6.3 Information for installation and commissioning .................................................... 149
228 6.3.1 General ....................................................................................................... 149
229 6.3.2 Mechanical considerations ........................................................................... 149
230 6.3.3 Environment ................................................................................................ 150
231 6.3.4 Handling and mounting ................................................................................ 150
232 6.3.5 Enclosure temperature ................................................................................ 150
233 6.3.6 Open type PECS ......................................................................................... 150
234 6.3.6.1 Fire protection for open type PECS ........................................... 150
235 6.3.6.2 Protection against electric shock not provided by236 enclosures or barriers ............................................................... 150
237 6.3.7 Connections ................................................................................................ 151
238 6.3.7.1 General ..................................................................................... 151
239 6.3.7.2 Interconnection and wiring diagram ........................................... 151
240 6.3.7.3 Conductor (cable) selection....................................................... 151
241 6.3.7.4 Identification and other details of field wiring terminals ............. 151
242 6.3.7.5 Plug and socket-outlets ............................................................. 152
243 6.3.8 Commissioning ............................................................................................ 152
244 6.3.9 Protection requirements ............................................................................... 152
245 6.3.9.1 Accessible parts and circuits ..................................................... 152
246 6.3.9.2 Equipment class .......
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