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Photovoltaic (PV) module safety qualification – Part 1: Requirements for construction
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IEC 61730-1
Edition 2.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic (PV) module safety qualification –
Part 1: Requirements for construction
Qualification pour la sûreté de fonctionnement des modules photovoltaïques
(PV) –
Partie 1: Exigences pour la construction
IEC 61730-1:2016-08(en-fr)
®
colour
inside
Customer: Roger Miao - No. of User(s): 1 - Company: China
Order No.: WS-2016-008063 - IMPORTANT: This file is copyright of IEC, Geneva, Switzerland. All rights reserved.
This file is subject to a licence agreement. Enquiries to Email: custserv@iec.ch - Tel.: +41 22 919 02 11

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Customer: Roger Miao - No. of User(s): 1 - Company: China
Order No.: WS-2016-008063 - IMPORTANT: This file is copyright of IEC, Geneva, Switzerland. All rights reserved.
This file is subject to a licence agreement. Enquiries to Email: custserv@iec.ch - Tel.: +41 22 919 02 11

IEC 61730-1
Edition 2.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic (PV) module safety qualification –
Part 1: Requirements for construction
Qualification pour la sûreté de fonctionnement des modules photovoltaïques
(PV) –
Partie 1: Exigences pour la construction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160
ISBN 978-2-8322-3574-4
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
®
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
colour
inside
Customer: Roger Miao - No. of User(s): 1 - Company: China
Order No.: WS-2016-008063 - IMPORTANT: This file is copyright of IEC, Geneva, Switzerland. All rights reserved.
This file is subject to a licence agreement. Enquiries to Email: custserv@iec.ch - Tel.: +41 22 919 02 11

– 2 – IEC 61730-1:2016 © IEC 2016
CONTENTS
FOREWORD......................................................................................................................... 5
1 Scope ............................................................................................................................ 7
2 Normative references .................................................................................................... 7
3 Terms and definitions .................................................................................................... 9
3.1 General terms and definitions .............................................................................. 10
3.2 Components........................................................................................................ 11
3.3 Installation and application .................................................................................. 12
3.4 Insulation system ................................................................................................ 12
3.5 Ratings ............................................................................................................... 14
4 Classification, applications and intended use ................................................................ 16
4.1 General ............................................................................................................... 16
4.2 PV modules of class 0 ......................................................................................... 16
4.2.1 General ....................................................................................................... 16
4.2.2 Insulation ..................................................................................................... 16
4.2.3 Application ................................................................................................... 16
4.3 PV modules of class II ......................................................................................... 17
4.3.1 General ....................................................................................................... 17
4.3.2 Insulation ..................................................................................................... 17
4.3.3 Application ................................................................................................... 17
4.4 PV modules of class III ........................................................................................ 17
4.4.1 General ....................................................................................................... 17
4.4.2 Insulation ..................................................................................................... 17
4.4.3 Application ................................................................................................... 18
4.5 Intended use ....................................................................................................... 18
5 Requirements for design and construction .................................................................... 18
5.1 General ............................................................................................................... 18
5.2 Marking and documentation ................................................................................. 19
5.2.1 General ....................................................................................................... 19
5.2.2 Marking ....................................................................................................... 19
5.2.3 Documentation ............................................................................................. 21
5.3 Electrical components and insulation ................................................................... 23
5.3.1 General ....................................................................................................... 23
5.3.2 Internal wiring .............................................................................................. 23
5.3.3 External wiring and cables............................................................................ 23
5.3.4 Connectors .................................................................................................. 23
5.3.5 Junction boxes for PV modules .................................................................... 23
5.3.6 Frontsheets and backsheets ......................................................................... 24
5.3.7 Insulation barriers ........................................................................................ 24
5.3.8 Electrical connections .................................................................................. 24
5.3.9 Encapsulants ............................................................................................... 25
5.3.10 Bypass diodes ............................................................................................. 25
5.4 Mechanical and electromechanical connections ................................................... 25
5.4.1 General ....................................................................................................... 25
5.4.2 Screw connections ....................................................................................... 26
5.4.3 Rivets .......................................................................................................... 27
5.4.4 Thread-cutting screws .................................................................................. 27
5.4.5 Form/press/tight fit ....................................................................................... 27
Customer: Roger Miao - No. of User(s): 1 - Company: China
Order No.: WS-2016-008063 - IMPORTANT: This file is copyright of IEC, Geneva, Switzerland. All rights reserved.
This file is subject to a licence agreement. Enquiries to Email: custserv@iec.ch - Tel.: +41 22 919 02 11

IEC 61730-1:2016 © IEC 2016 – 3 –
5.4.6
Connections by adhesives ............................................................................ 27
5.4.7 Other connections ........................................................................................ 28
5.5 Materials ............................................................................................................. 28
5.5.1 General ....................................................................................................... 28
5.5.2 Polymeric materials ...................................................................................... 28
5.5.3 Metallic materials ......................................................................................... 31
5.5.4 Adhesives .................................................................................................... 31
5.6 Protection against electric shock ......................................................................... 31
5.6.1 General ....................................................................................................... 31
5.6.2 Protection against accessibility to hazardous live parts ................................. 32
5.6.3 Insulation coordination ................................................................................. 33
5.6.4 Distance through insulation (dti) ................................................................... 34
Annex A (informative) Symbol "Do not disconnect under load" ............................................ 40
Annex B (normative) Insulation coordination ....................................................................... 41
B.1 General ............................................................................................................... 41
B.2 Influencing factors ............................................................................................... 41
B.2.1 General ....................................................................................................... 41
B.2.2 Overvoltage category (4.3.3.2 of IEC 60664-1:2007) and rated impulse
voltage ........................................................................................................ 41
B.3 Clearances ......................................................................................................... 43
B.4 Creepage distances ............................................................................................ 45
B.4.1 General ....................................................................................................... 45
B.4.2 Voltage ........................................................................................................ 45
B.4.3 Orientation and location of a creepage distance ............................................ 45
B.4.4 Shape of insulating surface .......................................................................... 45
B.4.5 Time under voltage stress ............................................................................ 45
B.5 Cemented joints .................................................................................................. 46
B.6 Enclosed parts .................................................................................................... 46
B.7 Distance through insulation ................................................................................. 46
B.7.1 Cemented joints ........................................................................................... 46
B.7.2 Insulation through thin layers ....................................................................... 46
B.8 Methods of measuring clearances (cl) and creepage distances (cr) ...................... 47
B.9 Figures examples ................................................................................................ 47
Figure 1 – IEC 60417-5017 ................................................................................................. 21
Figure 2 – IEC 60417-5021 ................................................................................................. 21
Figure 3 – IEC 60417-5018 ................................................................................................. 21
Figure 4 – Examples for individual layer assessment for relied upon insulation ..................... 37
Figure A.1 – Symbol "DO NOT DISCONNECT UNDER LOAD" ............................................. 40
Figure A.2 – Symbol "DO NOT DISCONNECT UNDER LOAD” (IEC 60417-6070) ................. 40
Figure B.1 – Examples (1 to 11) of methods of measuring clearances and creepage
distances ............................................................................................................................ 50
Figure B.2 – Example for insulation coordination at glass/foil PV modules – No
cemented joint configuration ............................................................................................... 50
Figure B.3 – Example for creepage distance at glass/glass modules with edge
insulation – No cemented joint configuration ........................................................................ 51
Figure B.4 – Example for a glass/glass module with cemented joints .................................... 51
Customer: Roger Miao - No. of User(s): 1 - Company: China
Order No.: WS-2016-008063 - IMPORTANT: This file is copyright of IEC, Geneva, Switzerland. All rights reserved.
This file is subject to a licence agreement. Enquiries to Email: custserv@iec.ch - Tel.: +41 22 919 02 11
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