Concentrator photovoltaic (CPV) modules and assemblies - Safety qualification

IEC 62688:2017(E) 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.

Konzentrator-Photovoltaik (CPV-)Module und -Anordnungen - Sicherheitsqualifikation

Modules et ensembles photovoltaïques à concentration - Qualification de la sécurité

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.

Koncentratorski fotonapetostni (CPV) moduli in sestavi - Opredelitev varnosti

Ta dokument opisuje temeljne konstrukcijske in preskusne zahteve za koncentratorske fotonapetostne (CPV) module in sestave, da se zagotovi njihovo varno električno in mehansko delovanje v pričakovani življenjski dobi. Podane so specifične teme na področju ocenjevanja preprečitve električnega udara, požarne ogroženosti in osebnih poškodb zaradi mehanskih in okoljskih dejavnikov.
Ta dokument poskuša določiti osnovne zahteve za različne razrede uporabe koncentratorskih fotonapetostnih modulov in sestavov, vendar ne zajema vseh nacionalnih in regionalnih predpisov.
Ta dokument je oblikovan tako, da se lahko njegovo preskusno zaporedje uskladi z zaporedji iz standarda IEC 62108, zato se lahko za vrednotenje varnosti in učinkovitosti koncentratorskih fotonapetostnih modulov in sestavov uporabi ena sama skupina vzorcev.
Koncentratorski fotonapetostni moduli, ki so sestavljeni v obliki ploščatih modulov in delujejo pri 3-kratnem in manjšem razmerju geometrične koncentracije, so upoštevani za ocenjevanje v skladu s standardoma IEC 61730-1 in IEC 61730-2.

General Information

Status
Published
Publication Date
01-Feb-2018
Current Stage
6060 - Document made available
Due Date
02-Feb-2018
Completion Date
02-Feb-2018

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SLOVENSKI STANDARD
SIST EN IEC 62688:2018
01-april-2018
Koncentratorski fotonapetostni (CPV) moduli in sestavi - Opredelitev varnosti
Concentrator photovoltaic (CPV) module and assembly safety qualification
Ta slovenski standard je istoveten z: EN IEC 62688:2018
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
SIST EN IEC 62688:2018 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62688:2018
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SIST EN IEC 62688:2018
EUROPEAN STANDARD EN IEC 62688
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2018
ICS 27.160
English Version
Concentrator photovoltaic (CPV) modules and assemblies -
Safety qualification
(IEC 62688:2017)

Modules et ensembles photovoltaïques à concentration - Konzentrator-Photovoltaik (CPV-)Module und -

Qualification de la sécurité Anordnungen - Sicherheitsqualifikation
(IEC 62688:2017) (IEC 62688:2017)

This European Standard was approved by CENELEC on 2017-10-20. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62688:2018 E
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SIST EN IEC 62688:2018
EN IEC 62688:2018
European foreword

The text of document 82/1299/FDIS, future edition 1 of IEC 62688, prepared by IEC/TC 82 "Solar

photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 62688:2018.
The following dates are fixed:
(dop) 2018-08-02
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-02-02
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 62688:2017 was approved by CENELEC as a European

Standard without any modification.
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SIST EN IEC 62688:2018
EN IEC 62688:2018
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
- - Fire classification of construction products EN 13501-1:2007 -
and building elements - +A1:2009
Part 1: Classification using data from
reaction to fire tests
IEC 60060-1 - High-voltage test techniques - EN 60060-1 -
Part 1: General definitions and test
requirements
IEC 60065 - Audio, video and similar electronic EN 60065 -
apparatus - Safety requirements
IEC 60112 - Method for the determination of the proof EN 60112 -
and the comparative tracking indices of
solid insulating materials
IEC 60216-5 - Electrical insulating materials - Thermal EN 60216-5 -
endurance properties -
Part 5: Determination of relative thermal
endurance index (RTE) of an insulating
material
IEC 60243-2 - Electric strength of insulating materials - EN 60243-2 -
Test methods - Part 2: Additional
requirements for tests using direct voltage
IEC 60417-DB - Graphical symbols for use on equipment - -
IEC 60529 - Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems -
Part 1: Principles, requirements and tests
IEC/TR 60664-2-1 2011 Insulation coordination for equipment - -
within low-voltage systems -
Part 2-1: Application guide - Explanation of
the application of the IEC 60664 series,
dimensioning examples and dielectric
testing
---------------------- Page: 5 ----------------------
SIST EN IEC 62688:2018
EN IEC 62688:2018
Publication Year Title EN/HD Year
IEC 60664-3 2016 Insulation coordination for equipment EN 60664-3 2017
within low-voltage systems - Part 3: Use of
coating, potting or moulding for protection
against pollution
IEC 60695-1-10 - Fire hazard testing - Part 1-10: Guidance EN 60695-1-10 -
for assessing the fire hazard of
electrotechnical products - General
guidelines
IEC 60695-1-11 - Fire hazard testing - Part 1-11: Guidance EN 60695-1-11 -
for assessing the fire hazard of
electrotechnical products - Fire hazard
assessment
IEC 60695-2-10 - Fire hazard testing - EN 60695-2-10 -
Part 2-10: Glowing/hot-wire based test
methods - Glow-wire apparatus and
common test procedure
IEC 60695-11-20 - Fire hazard testing - Part 11-20: Test EN 60695-11-20 -
flames - 500 W flame test method
IEC 60904-3 - Photovoltaic devices - EN 60904-3 -
Part 3: Measurement principles for
terrestrial photovoltaic (PV) solar devices
with reference spectral irradiance data
IEC 60947-1 - Low-voltage switchgear and controlgear - EN 60947-1 -
Part 1: General rules

IEC 60950-1 (mod) 2005 Information technology equipment - Safety EN 60950-1 2006

- Part 1: General requirements +A11 2009
+AC 2011
+A12 2011
IEC 61032 - Protection of persons and equipment by EN 61032 -
enclosures - Probes for verification
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 61215-2 - Terrestrial photovoltaic (PV) modules - EN 61215-2 -
Design qualification and type approval -
Part 2: Test procedures
IEC 61508 Series Functional safety of EN 61508 Series
electrical/electronic/programmable
electronic safety-related systems
IEC 61730-1 2016 Photovoltaic (PV) module safety EN 61730-1 2016
qualification - Part 1: Requirements for
construction
IEC 61730-2 2016 Photovoltaic (PV) module safety EN 61730-2 2016
qualification - Part 2: Requirements for
testing
IEC/TS 61836 - Solar photovoltaic energy systems - - -
Terms, definitions and symbols
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SIST EN IEC 62688:2018
EN IEC 62688:2018
Publication Year Title EN/HD Year
IEC 62108 2016 Concentrator photovoltaic (CPV) modules EN 62108 2016
and assemblies - Design qualification and
type approval
IEC 62305-2 - Protection against lightning - Part 2: Risk EN 62305-2 -
management
IEC 62305-3 - Protection against lightning - Part 3: EN 62305-3 -
Physical damage to structures and life
hazard
IEC 62548 - Photovoltaic (PV) arrays - Design - -
requirements
IEC 62670-1 - Photovoltaic concentrators (CPV) - EN 62670-1 -
Performance testing - Part 1: Standard
conditions
IEC 62790 - Junction boxes for photovoltaic modules - EN 62790 -
Safety requirements and tests
IEC 62852 2014 Connectors for DC-application in EN 62852 2015
photovoltaic systems - Safety requirements
and tests
ISO 179-1 - Plastics - Determination of Charpy impact EN ISO 179-1 -
properties - Part 1: Non-instrumented
impact test
ISO 261 - ISO general-purpose metric screw threads - -
- General plan
ISO 262 - ISO general purpose metric screw threads - -
- Selected sizes for screws, bolts and nuts
ISO 527 Series Plastics - Determination of tensile EN ISO 527 Series
properties
ISO 834-1 - Fire-resistance tests - Elements of building - -
construction - Part 1: General requirements
ISO/TR 834-3 - Fire-resistance tests - Elements of building - -
construction - Part 3: Commentary on test
method and guide to the application of the
outputs from the fire-resistance test
ISO 1456 - Metallic and other inorganic coatings - EN ISO 1456 -
Electrodeposited coatings of nickel, nickel
plus chromium, copper plus nickel and of
copper plus nickel plus chromium
ISO 1461 - Hot dip galvanized coatings on fabricated EN ISO 1461 -
iron and steel articles_- Specifications and
test methods
ISO 2081 - Metallic and other inorganic coatings - EN ISO 2081 -
Electroplated coatings of zinc with
supplementary treatments on iron or steel
ISO 2093 - Electroplated coatings of tin; Specification - -
and test methods
---------------------- Page: 7 ----------------------
SIST EN IEC 62688:2018
EN IEC 62688:2018
Publication Year Title EN/HD Year
ISO 4892-2 - Plastics - Methods of exposure to EN ISO 4892-2 -
laboratory light sources - Part 2: Xenon-arc
lamps
ISO 5657 - Reaction to fire tests - Ignitability of - -
building products using a radiant heat
source
ISO 8124-1 - Safety of toys - Part 1: Safety aspects - -
related to mechanical and physical
properties
Test methods for roof coverings under the
ENV 1187-1 to -4
influence of a thermal attack of burning
brands and radiant heat
ANSI/UL 790 2004 Standard for Standard Test Methods for - -
Fire Tests of Roof Coverings
ANSI/UL 746B - Standard for Polymeric Materials - Long - -
Term Property Evaluations
ANSI/UL 746C - Standard for Polymeric Materials - Use in - -
Electrical Equipment Evaluations
ANSI/UL 1703 - Standard for Flat-Plate Photovoltaic - -
Modules and Panels
ASTM E162-13 - Standard Test Method for Surface - -
Flammability of Materials Using a Radiant
Heat Energy Source
ASTM D3755-14 - Standard Test Method for Dielectric - -
Breakdown Voltage and Dielectric Strength
of Solid Electrical Insulating Materials
Under Direct-Voltage Stress
ASTM D257-14 - Standard Test Methods for DC Resistance - -
or Conductance of Insulating Materials
ASTM D1002-10 - Standard Test Method for Apparent Shear - -
Strength of Single-Lap-Joint Adhesively
Bonded Metal Specimens by Tension
Loading (Metal-to-Metal)
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SIST EN IEC 62688:2018
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

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 9 ----------------------
SIST EN IEC 62688:2018
– 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

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SIST EN IEC 62688:2018
IEC 62688:2017 © IEC 2017 – 3 –

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 ......................................................................................................... 42

18.4 Conduit applications – Metallic .............................................................................. 42

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SIST EN IEC 62688:2018
– 4 – IEC 62688:2017 © IEC 2017

18.5 Conduit applications – Non-metallic ...................................................................... 42

19 Requirements for testing – Test categories .................................................................... 43

19.1 General ................................................................................................................. 43

19.2 Preconditioning tests ............................................................................................ 43

19.3 General inspection ................................................................................................ 44

19.4 Electrical shock hazard ......................................................................................... 44

19.5 Fire hazard ........................................................................................................... 44

19.6 Mechanical stress ................................................................................................. 45

20 Testing .......................................................................................................................... 45

20.1 General ................................................................................................................. 45

20.2 Visual inspection ................................................................................................... 50

20.2.1 General ......................................................................................................... 50

20.2.2 Requirements ................................................................................................ 50

20.3 Accessibility test ................................................................................................... 51

20.3.1 Purpose ......................................................................................................... 51

20.3.2 Apparatus ...................................................................................................... 51

20.3.3 Procedure ...................................................................................................... 51

20.3.4 Requirements ................................................................................................ 51

20.4 Grounding/Bonding path continuity test ................................................................. 51

20.4.1 Purpose ......................................................................................................... 51

20.4.2 Procedure ...................................................................................................... 51

20.4.3 Requirements ................................................................................................ 51

20.5 Dielectric voltage withstand test ............................................................................ 51

20.5.1 Purpose ......................................................................................................... 51

20.5.2 Procedure ...................................................................................................... 52

20.5.3 Requirements ................................................................................................ 52

20.6 Wet insulation test ................................................................................................ 52

20.6.1 Purpose ......................................................................................................... 52

20.6.2 Procedure ...................................................................................................... 52

20.6.3 Requirements ................................................................................................ 52

20.7 Reverse current overload ...................................................................................... 53

20.7.1 Purpose ......................................................................................................... 53

20.7.2 Procedure ...................................................................................................... 53

20.7.3 Requirements ................................................................................................ 53

20.8 Thermal cycling..................................................................................................... 53

20.8.1 General ......................................................................................................... 53

20.8.2 Purpose ......................................................................................................... 54

20.8.3 Procedure ...................................................................................................... 54

20.8.4 Requirements ................................................................................................ 54

20.9 Humidity freeze ..................................................................................................... 54

20.9.1 General ......................................................................................................... 54

20.9.2 Purpose ......................................................................................................... 54

20.9.3 Procedure ...................................................................................................... 54

20.9.4 Requirements ................................................................................................ 54

20.10 Damp heat ............................................................................................................ 54

20.10.1 General ......................................................................................................... 54

20.10.2 Purpose ......................................................................................................... 54

20.10.3 Procedure ......
...

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