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BS EN IEC 62788-2-1:2023

$167.15

Measurement procedures for materials used in photovoltaic modules – Polymeric materials. Frontsheet and backsheet. Safety requirements

Published By Publication Date Number of Pages
BSI 2023 38
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
13 1 Scope
2 Normative references
14 3 Terms, definitions and abbreviated terms
3.1 General terms and definitions
3.2 Sheet types and orientations
15 3.3 Electrical insulation
16 3.4 Temperatures
3.5 Tensile properties
17 4 Designation and ratings
5 Requirements
5.1 General
5.1.1 Overview
18 5.1.2 Single-layer constructions
Figures
Figure 1 – Schematic diagrams of typical constructions of front- or backsheets
19 5.1.3 Multilayer constructions
5.2 Insulation coordination
5.2.1 General
5.2.2 Breakdown voltage requirement for complete front- or backsheet
20 5.2.3 Breakdown voltage requirements for individual layers
5.2.4 Creepage distance requirements
Tables
Table 1 – Minimum breakdown voltage requirements for basic and double/reinforced insulation before and after accelerated aging
21 5.2.5 Distance through insulation requirements
5.3 Thermal endurance
Table 2 – Minimum distance through insulation requirements
22 5.4 Mechanical requirements
5.5 Model and variant designation
6 Evaluation of test results
6.1 General
23 6.2 Visual inspection – FBST 01
6.2.1 General
6.2.2 Reporting
6.3 Tensile properties – FBST 02
6.3.1 General
6.3.2 Reporting
24 6.4 Breakdown voltage – FBST 03
6.4.1 General
25 6.4.2 Analysis
6.4.3 Reporting
Figure 2 – Examples of calculations for determinationof DTI ratio and adjusted breakdown voltage
26 6.5 Distance through insulation – FBST 04
6.5.1 General
6.5.2 Analysis
27 6.5.3 Reporting
6.6 Material group – FBST 05
6.6.1 General
Figure 3 – Determining distance through insulation from laminationprotrusion test as a function of temperature rating
28 6.6.2 Reporting
6.7 Thermal endurance – FBST 06
6.7.1 General
6.7.2 Reporting
6.8 Accelerated ageing tests
6.8.1 Damp heat – FBST 07
6.8.2 UV weathering – FBST 08
Figure 4 – Schematic of lamination protrusion test result for determiningwhich surfaces will be evaluated for minimum creepage distancein the IEC 61730 module design review
29 6.8.3 Reporting
Table 3 – UV exposure conditions
30 6.9 Overview tables
Table 4 – Evaluations and requirements overview for individual layers
Table 5 – Evaluations and requirements overview for complete front- and/or backsheets
31 7 Evaluation report
7.1 Report
8 Documentation and testing for similar materials
8.1 General
32 8.2 Alternate constituent layers
8.3 Thickness variants
8.4 Color variants
33 8.5 Reporting for similar materials with different color or thickness
35 Annex A (informative)Chemical analytical material identification
A.1 General
A.2 Examples of fingerprint techniques
36 Bibliography
BS EN IEC 62788-2-1:2023
$167.15