IEC 62688:2017
(Main)Concentrator photovoltaic (CPV) modules and assemblies - Safety qualification
Concentrator photovoltaic (CPV) modules and assemblies - Safety qualification
IEC 62688:2017 describes the fundamental construction and testing requirements for Concentrator Photovoltaic (CPV) modules and assemblies in order to provide safe electrical and mechanical operation during their expected lifetime. Specific topics are provided to assess the prevention of electrical shock, fire hazards, and personal injury due to mechanical and environmental stresses. This document attempts to define the basic requirements for various application classes of concentrator photovoltaic modules and assemblies, but does not encompass all national and regional codes. This document is designed so that its test sequence can coordinate with those of IEC 62108, so that a single set of samples may be used to perform both the safety and performance evaluation of a CPV module and assembly.
Modules et ensembles photovoltaïques à concentration (CPV) - Qualification pour la sûreté de fonctionnement
l'IEC 62688:2017 décrit les exigences fondamentales de construction et d'essai pour les modules et ensembles photovoltaïques à concentration CPV (abréviation de l'anglais "concentrator photovoltaic") afin de fournir un fonctionnement électrique et mécanique sûr sur toute leur durée de vie prévue. Des thèmes spécifiques sont fournis pour évaluer la prévention contre les chocs électriques, les risques de feu et les accidents corporels dus à des contraintes mécaniques et environnementales. Le présent document a pour objet de définir les exigences de base pour différentes classes d'application de modules et d’ensembles photovoltaïques à concentration, mais il ne peut être considéré comme couvrant tous les codes nationaux et régionaux. Le présent document est conçu pour que sa séquence d'essais puisse être coordonnée avec celles de l'IEC 62108, de manière à pouvoir utiliser un seul ensemble d'échantillons pour évaluer la sûreté et les performances d'un module et d'un ensemble CPV.
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IEC 62688 ®
Edition 1.0 2017-09
INTERNATIONAL
STANDARD
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inside
Concentrator photovoltaic (CPV) modules and assemblies – Safety qualification
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International Standards for all electrical, electronic and related technologies.
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IEC 62688 ®
Edition 1.0 2017-09
INTERNATIONAL
STANDARD
colour
inside
Concentrator photovoltaic (CPV) modules and assemblies – Safety qualification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-4719-8
– 2 – IEC 62688:2017 © IEC 2017
CONTENTS
FOREWORD . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 13
4 Sampling . 15
5 Marking . 20
5.1 Nameplate . 20
5.2 Hazards . 21
5.2.1 High intensity light . 21
5.2.2 Field connections. 21
5.2.3 Hot surfaces . 22
6 Report . 22
7 Requirements for construction – Module application classes . 23
7.1 General . 23
7.2 Class II – general access, hazardous voltage, current and power, double
insulated/reinforced insulation. 23
7.2.1 Electrical output . 23
7.2.2 Protection . 23
7.2.3 Application . 24
7.3 Class 0 – Restricted access, hazardous voltage, current and power basic
insulation only with no protection from faults . 24
7.3.1 Electrical output . 24
7.3.2 Protection . 24
7.3.3 Application . 24
7.4 Class 0-X – additional fire or concentrated light hazard . 24
7.5 Class III – general access limited voltage, current and power . 24
7.5.1 Electrical output . 24
7.5.2 Protection . 24
7.5.3 Application . 24
7.6 Fire safety. 25
8 Construction . 25
9 Modifications . 25
10 Requirements for supplied documents . 25
10.1 General . 25
10.2 Fire . 25
10.3 Electrical . 25
10.4 Mechanical . 26
10.5 Temperature . 26
10.6 Field assembly . 26
10.7 Component ratings . 26
11 Overcurrent protection . 26
12 Metal parts . 27
12.1 Combinations of metals . 27
12.2 Corrosion protection . 27
12.3 Edges . 27
13 Polymeric materials . 27
13.1 General . 27
13.1.1 Overview . 27
13.1.2 Solid insulation and cemented joints . 27
13.1.3 Requirements for polymers . 28
13.1.4 Operational categories for CPV modules and assemblies . 29
13.2 Polymers serving as an enclosure for live parts (such as a junction box,
connector, or plug) . 30
13.3 Polymers serving in direct support of live parts (such as integrated terminals
and potting compounds) . 30
13.4 Polymers serving as an outer surface of a receiver (such as a front sheet or
back sheet on a flat-plate profile receiver in a medium-X assembly). 30
13.5 Polymers serving as an internal electrical barrier providing the sole
insulation between live parts . 31
13.6 Polymers serving as encapsulants . 31
13.7 Polymers serving as adhesives for attachment (such as for a junction box) . 31
13.8 Polymers serving as moisture barriers (such as edge sealants) . 31
13.9 Polymers serving as gaskets or seals (such as with front glass) . 31
13.10 Polymers serving as frames (such as with flat-plate profile medium-
concentration receivers) . 32
13.11 Polymers serving as CPV optics . 32
13.12 Polymers exposed to sunlight, serving as a mechanical support, not
functioning in categories 13.2 to 13.11 . 32
13.13 Polymers exposed to concentrated sunlight . 32
14 Internal wiring and current-carrying parts . 32
14.1 General . 32
14.2 Internal wiring . 32
14.3 Splices . 32
14.4 Mechanical securement . 33
15 Connections . 33
15.1 Field connections – general requirements . 33
15.2 Field wiring terminals . 33
15.3 Connectors . 34
15.4 Output lead or cables . 34
16 Bonding and grounding . 34
16.1 General . 34
16.2 Lightning protection . 35
17 Protection against electric shock and energy hazards . 35
17.1 General . 35
17.2 Fault conditions . 35
17.3 Protection against electric shock . 36
17.3.1 General . 36
17.3.2 Module classification . 36
17.3.3 Creepage and clearance distances . 37
17.3.4 Degrees of pollution in the micro-environment . 40
17.3.5 Cemented joints . 40
18 Field wiring compartments with covers . 42
18.1 General . 42
18.2 Strain relief . 42
18.3 Sharp edges .
...
IEC 62688 ®
Edition 1.0 2017-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Concentrator photovoltaic (CPV) modules and assemblies – Safety qualification
Modules et ensembles photovoltaïques à concentration (CPV) – Qualification
pour la sûreté de fonctionnement
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 62688 ®
Edition 1.0 2017-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Concentrator photovoltaic (CPV) modules and assemblies – Safety qualification
Modules et ensembles photovoltaïques à concentration (CPV) – Qualification
pour la sûreté de fonctionnement
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-6110-1
– 2 – IEC 62688:2017 © IEC 2017
CONTENTS
FOREWORD . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 13
4 Sampling . 15
5 Marking . 19
5.1 Nameplate . 19
5.2 Hazards . 20
5.2.1 High intensity light . 20
5.2.2 Field connections. 20
5.2.3 Hot surfaces . 21
6 Report . 21
7 Requirements for construction – Module application classes . 22
7.1 General . 22
7.2 Class II – general access, hazardous voltage, current and power, double
insulated/reinforced insulation. 22
7.2.1 Electrical output . 22
7.2.2 Protection . 22
7.2.3 Application . 23
7.3 Class 0 – Restricted access, hazardous voltage, current and power basic
insulation only with no protection from faults . 23
7.3.1 Electrical output . 23
7.3.2 Protection . 23
7.3.3 Application . 23
7.4 Class 0-X – additional fire or concentrated light hazard . 23
7.5 Class III – general access limited voltage, current and power . 23
7.5.1 Electrical output . 23
7.5.2 Protection . 23
7.5.3 Application . 23
7.6 Fire safety. 24
8 Construction . 24
9 Modifications . 24
10 Requirements for supplied documents . 24
10.1 General . 24
10.2 Fire . 24
10.3 Electrical . 24
10.4 Mechanical . 25
10.5 Temperature . 25
10.6 Field assembly . 25
10.7 Component ratings . 25
11 Overcurrent protection . 25
12 Metal parts . 26
12.1 Combinations of metals . 26
12.2 Corrosion protection . 26
12.3 Edges . 26
13 Polymeric materials . 26
13.1 General . 26
13.1.1 Overview . 26
13.1.2 Solid insulation and cemented joints . 26
13.1.3 Requirements for polymers . 27
13.1.4 Operational categories for CPV modules and assemblies . 28
13.2 Polymers serving as an enclosure for live parts (such as a junction box,
connector, or plug) . 29
13.3 Polymers serving in direct support of live parts (such as integrated terminals
and potting compounds) . 29
13.4 Polymers serving as an outer surface of a receiver (such as a front sheet or
back sheet on a flat-plate profile receiver in a medium-X assembly). 29
13.5 Polymers serving as an internal electrical barrier providing the sole
insulation between live parts . 30
13.6 Polymers serving as encapsulants . 30
13.7 Polymers serving as adhesives for attachment (such as for a junction box) . 30
13.8 Polymers serving as moisture barriers (such as edge sealants) . 30
13.9 Polymers serving as gaskets or seals (such as with front glass) . 30
13.10 Polymers serving as frames (such as with flat-plate profile medium-
concentration receivers) . 31
13.11 Polymers serving as CPV optics . 31
13.12 Polymers exposed to sunlight, serving as a mechanical support, not
functioning in categories 13.2 to 13.11 . 31
13.13 Polymers exposed to concentrated sunlight . 31
14 Internal wiring and current-carrying parts .
...
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