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IEC 62109-3
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of power converters for use in photovoltaic power systems –
Part 3: Particular requirements for electronic devices in combination with
photovoltaic elements
Sécurité des convertisseurs de puissance utilisés dans les systèmes
photovoltaïques –
Partie 3: Exigences particulières pour les dispositifs électroniques combinés
aux éléments photovoltaïques
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IEC 62109-3
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of power converters for use in photovoltaic power systems –
Part 3: Particular requirements for electronic devices in combination with
photovoltaic elements
Sécurité des convertisseurs de puissance utilisés dans les systèmes
photovoltaïques –
Partie 3: Exigences particulières pour les dispositifs électroniques combinés
aux éléments photovoltaïques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-8483-4
– 2 – IEC 62109-3:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General testing requirements . 9
4.1 General . 9
4.2 General conditions for testing . 16
4.2.1 Sequence of tests . 16
4.2.2 Reference test conditions . 18
4.3 Thermal testing . 18
4.3.2 Maximum temperatures . 18
4.4 Testing in single fault condition . 23
4.4.4 Single fault conditions to be applied . 23
4.8 Additional tests for grid-interactive inverters . 23
4.300 General requirements regarding protection of the PV element circuit of MIE . 23
5 Marking and documentation . 24
5.1 Marking . 24
5.1.1 General . 24
5.1.3 Identification . 24
5.1.4 Equipment ratings . 25
5.3 Documentation . 25
5.3.2 Information related to installation . 25
6 Environmental requirements and conditions . 25
7 Protection against electric shock and energy hazards . 25
8 Protection against mechanical hazards . 25
9 Protection against fire hazards . 25
10 Protection against sonic pressure hazards . 26
11 Protection against liquid hazards . 26
12 Protection against chemical hazards . 26
13 Physical requirements . 26
13.4 Internal wiring and connections . 26
13.4.5 Interconnection between parts of the PCE . 26
13.9 Fault indication . 27
13.9.300 Fault indication for MIE . 27
13.300 Requirements for field assembled MIE . 27
14 Components . 27
15 Software and firmware performing safety functions . 27
Annex A (normative) Alternative method for PV module nominal backsheet
temperature (T ) . 28
NBs
A.1 General . 28
A.2 Principle . 28
A.3 Test procedure . 28
Figure 300 – Test sequence . 17
Figure 301 – Location of heating pads . 20
Figure 302 – Test setup for Type B MIE (cross-section view) . 22
Figure 303 – Test setup for Type A MIE (cross-section view) . 22
Table 300 – IEC 61730-2:2016 test reference for Type A and Type B MIE . 11
– 4 – IEC 62109-3:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF POWER CONVERTERS
FOR USE IN PHOTOVOLTAIC POWER SYSTEMS –
Part 3: Particular requirements for electronic devices
in combination with photovoltaic elements
FOREWORD
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