EN IEC 62788-2-1:2023

Measurement procedures for materials used in photovoltaic modules - Part 2-1: Polymeric materials - Frontsheet and backsheet - Safety requirements

This document specifies the safety requirements for flexible polymeric frontsheet and backsheet constructions, which are intended for use as relied upon insulation in photovoltaic (PV) modules. In accordance with the corresponding safety requirements in IEC 61730-1 on the PV module level, the test methods and specifications in this document define the specific requirements of the polymeric frontsheet or backsheet constructions on the component level and cover mechanical, electrical, visual and thermal characterization in an unexposed state and/or after ageing. A polymeric frontsheet and backsheet must pass the requirements in this standard for a PV module to pass the design requirements of IEC 61730-1. Compliance with the safety requirements for a frontsheet or backsheet on the component level does not replace the need for a safety qualification of the complete PV module, in which the frontsheet or backsheet is integrated. The appropriate requirements for testing and qualification on the PV module level are defined in IEC 61730-1 (or IEC TS 62915 in case of retesting) and IEC 61215-1, with test methods provided by IEC 61730-2 and IEC 61215-2, respectively.

Messverfahren für Werkstoffe, die in Photovoltaik-Modulen verwendet werden - Teil 2-1: Polymerwerkstoffe - Frontsheets und Backsheets - Sicherheitsanforderungen

Procédures de mesure des matériaux utilisés dans les modules photovoltaïques - Partie 2-1: Matériaux polymères - Face avant et face arrière - Exigences de sécurité

IEC 62788-2-1:2023 spécifie les exigences de sécurité pour les constructions souples de faces avant et de faces arrière polymères, prévues pour être utilisées comme isolation attendue dans les modules photovoltaïques (PV). Les spécifications du présent document définissent les exigences spécifiques des constructions des faces avant ou arrière polymères au niveau des composants et couvrent la caractérisation mécanique, électrique, visuelle et thermique des faces avant et arrière à l'état non exposé et/ou après vieillissement. Le présent document couvre les modules de classe II et de classe 0 définis dans l'IEC 61730‑1. Les modules de classe III sont hors du domaine d'application. Le présent document fournit les exigences de qualification des faces avant et arrière à utiliser pour la qualification pour la sûreté de fonctionnement du module conformément à l'IEC 61730‑1. Les descriptions des méthodes d'essai sont données dans l'IEC TS 62788-2, ainsi que des méthodes de caractérisation supplémentaires utiles pour assurer les performances ou la qualité.

Merilni postopki za materiale, uporabljene v fotonapetostnih modulih - 2-1. del: Polimerni materiali - Prednja in zadnja plast - Varnostne zahteve

Ta dokument določa varnostne zahteve za prožne polimerne konstrukcije prednje in zadnje plasti, ki so namenjene uporabi kot izolacija v fotonapetostnih (PV) modulih. V skladu z ustreznimi varnostnimi zahtevami iz standarda IEC 61730-1 na ravni fotonapetostnega modula preskusne metode in specifikacije v tem dokumentu določajo posebne zahteve za polimerne konstrukcije prednje oziroma zadnje plasti na ravni komponente ter zajemajo mehansko, električno, vizualno in toplotno karakterizacijo v neizpostavljenem stanju in/ali po staranju.
Polimerna prednja in zadnja plast morata ustrezati zahtevam v tem standardu, da fotonapetostni modul izpolnjuje zahteve glede izvedbe v standardu IEC 61730-1. Skladnost z varnostnimi zahtevami za prednjo in zadnjo ploščo na ravni komponente ne odpravlja potrebe po varnostnih zahtevah celotnega fotonapetostnega modula, v katerega je vgrajena sprednja oziroma zadnja plošča. Ustrezne zahteve za preskušanje in kvalifikacijo na ravni fotonapetostnega modula so opredeljene v standardih IEC 61730-1 (oziroma IEC TS 62915 v primeru vnovičnega preskušanja) in IEC 61215-1; preskusne metode so podane v standardih IEC 61730-2 in IEC 61215-2.

General Information

• Status: Published
• Publication Date: 05-Oct-2023
• ICS: 27.160 - Solar energy engineering
• Technical Committee: CLC/TC 82 - Solar photovoltaic energy systems
• Drafting Committee: IEC/TC 82 - IEC_TC_82
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Oct-2023
• Due Date: 01-Apr-2021
• Completion Date: 06-Oct-2023
• Ref Project: SIST EN IEC 62788-2-1:2024 - Measurement procedures for materials used in photovoltaic modules - Part 2-1: Polymeric materials - Frontsheet and backsheet - Safety requirements

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2024
Merilni postopki za materiale, uporabljene v fotonapetostnih modulih - 2-1. del:
Polimerni materiali - Prednja in zadnja plast - Varnostne zahteve
Measurement procedures for materials used in photovoltaic modules - Part 2-1:
Polymeric materials - Frontsheet and backsheet - Safety requirements
Messverfahren für Werkstoffe, die in Photovoltaik-Modulen verwendet werden – Teil 2-1:
Polymerwerkstoffe – Frontsheets und Backsheets – Sicherheitsanforderungen
Procédures de mesure des matériaux utilisés dans les modules photovoltaïques - Partie
2-1: Matériaux polymères - Face avant et face arrière - Exigences de sécurité
Ta slovenski standard je istoveten z: EN IEC 62788-2-1:2023
ICS:
27.160 Sončna energija Solar energy engineering
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62788-2-1

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 27.160
English Version
Measurement procedures for materials used in photovoltaic
modules - Part 2-1: Polymeric materials - Frontsheet and
backsheet - Safety requirements
(IEC 62788-2-1:2023)
Procédures de mesure des matériaux utilisés dans les Messverfahren für Werkstoffe, die in Photovoltaik-Modulen
modules photovoltaïques - Partie 2-1: Matériaux polymères verwendet werden - Teil 2-1: Polymerwerkstoffe -
- Face avant et face arrière - Exigences de sécurité Frontsheets und Backsheets - Sicherheitsanforderungen
(IEC 62788-2-1:2023) (IEC 62788-2-1:2023)
This European Standard was approved by CENELEC on 2023-09-29. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62788-2-1:2023 E

European foreword
The text of document 82/2123/FDIS, future edition 1 of IEC 62788-2-1, prepared by IEC/TC 82 "Solar
photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62788-2-1:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-06-29
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-09-29
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62788-2-1:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60112:2020 NOTE Approved as EN IEC 60112:2020 (not modified)
IEC 62941:2019 NOTE Approved as EN IEC 62941:2020 (not modified)
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60216-1 - Electrical insulating materials - Thermal EN 60216-1 -
endurance properties - Part 1: Ageing
procedures and evaluation of test results
IEC 60216-3 - Electrical insulating materials - Thermal EN IEC 60216-3 -
endurance properties - Part 3: Instructions
for calculating thermal endurance
characteristics
IEC 60216-5 - Electrical insulating materials - Thermal EN IEC 60216-5 -
endurance properties - Part 5:
Determination of relative temperature index
(RTI) of an insulating material
IEC 60664-1 - Insulation coordination for equipment EN IEC 60664-1 -
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 61215-1 - Terrestrial photovoltaic (PV) modules - EN IEC 61215-1 -
Design qualification and type approval -
Part 1: Test requirements
IEC 61215-2 - Terrestrial photovoltaic (PV) modules - EN IEC 61215-2 -
Design qualification and type approval -
Part 2: Test procedures
IEC 61730-1 - Photovoltaic (PV) module safety EN IEC 61730-1 -
qualification - Part 1: Requirements for
construction
IEC 61730-2 - Photovoltaic (PV) module safety EN IEC 61730-2 -
qualification - Part 2: Requirements for
testing
IEC/TS 61836 - Solar photovoltaic energy systems - - -
Terms, definitions and symbols
IEC TS 62788-2 - Measurement procedures for materials - -
used in photovoltaic modules - Part 2:
Polymeric materials - Frontsheets and
backsheets
IEC/TS 62915 - Photovoltaic (PV) modules - Type - -
approval, design and safety qualification -
Retesting
IEC TS 63126 2020 Guidelines for qualifying PV modules, - -
components and materials for operation at
high temperatures
ISO 527-3 - Plastics - Determination of tensile EN ISO 527-3 -
properties - Part 3: Test conditions for films
and sheets
IEC 62788-2-1 ®
Edition 1.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Measurement procedures for materials used in photovoltaic modules –

Part 2-1: Polymeric materials – Frontsheet and backsheet – Safety requirements

Procédures de mesure des matériaux utilisés dans les modules photovoltaïques –

Partie 2-1: Matériaux polymères – Face avant et face arrière – Exigences de

sécurité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160  ISBN 978-2-8322-6887-2

– 2 – IEC 62788-2-1:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 General terms and definitions . 9
3.2 Sheet types and orientations . 9
3.3 Electrical insulation . 10
3.4 Temperatures . 11
3.5 Tensile properties . 11
4 Designation and ratings . 12
5 Requirements . 12
5.1 General . 12
5.1.1 Overview . 12
5.1.2 Single-layer constructions . 13
5.1.3 Multilayer constructions . 14
5.2 Insulation coordination . 14
5.2.1 General . 14
5.2.2 Breakdown voltage requirement for complete front- or backsheet . 14
5.2.3 Breakdown voltage requirements for individual layers . 15
5.2.4 Creepage distance requirements . 15
5.2.5 Distance through insulation requirements . 16
5.3 Thermal endurance . 16
5.4 Mechanical requirements . 17
5.5 Model and variant designation . 17
6 Evaluation of test results . 17
6.1 General . 17
6.2 Visual inspection – FBST 01 . 18
6.2.1 General . 18
6.2.2 Reporting . 18
6.3 Tensile properties – FBST 02 . 18
6.3.1 General . 18
6.3.2 Reporting . 18
6.4 Breakdown voltage – FBST 03 . 19
6.4.1 General . 19
6.4.2 Analysis . 20
6.4.3 Reporting . 20
6.5 Distance through insulation – FBST 04 . 21
6.5.1 General . 21
6.5.2 Analysis . 21
6.5.3 Reporting . 22
6.6 Material group – FBST 05 . 22
6.6.1 General . 22
6.6.2 Reporting . 23
6.7 Thermal endurance – FBST 06 . 23
6.7.1 General . 23

IEC 62788-2-1:2023 © IEC 2023 – 3 –
6.7.2 Reporting . 23
6.8 Accelerated ageing tests . 23
6.8.1 Damp heat – FBST 07 . 23
6.8.2 UV weathering – FBST 08 .
...