BS EN IEC 62938:2020
$142.49
Photovoltaic (PV) modules. Non-uniform snow load testing
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 26 |
IEC 62938:2020 provides a method for determining how well a framed PV module performs mechanically under the influence of inclined non-uniform snow loads. This document is applicable for framed modules with frames protruding beyond the front glass surface on the lower edge after intended installation and as such creates an additional barrier to snow sliding down from modules. For modules with other frame constructions, such as backrails formed in frames, on the side edges, on the top edge and on the lower edge not creating an additional snow slide barrier, this document is not applicable. The test method determines the mechanical non-uniform-load limit of a framed PV module.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 7 | English CONTENTS |
| 8 | FOREWORD |
| 10 | 1 Scope 2 Normative references |
| 11 | 3 Terms and definitions 4 Sampling |
| 12 | 5 Prerequisites 6 Testing 6.1 General 6.2 Projections of the test results 6.3 Test plan |
| 13 | Figures Figure 1 – Test plan for inhomogeneous snow load test |
| 14 | 7 Test procedures 7.1 Visual inspection 7.2 Maximum power determination 7.3 Insulation test 7.4 Wet leakage current test 7.5 Humidity-freeze test 7.6 Electroluminescence imaging 7.7 Non-uniform snow load test 7.7.1 Purpose 7.7.2 Load specification |
| 15 | Figure 2 – Distribution of load on the test specimen at inclination Tables Table 1 – Applicable load in relation to angle of pitch of roof |
| 16 | 7.7.3 Apparatus |
| 17 | Figure 3 – Simplified cross-sectional view of module width along bottom frame |
| 18 | 7.7.4 Procedure |
| 19 | Figure 4 – Test procedure for the snow load test Figure 5 – Different deflection graphs under static load |
| 20 | 8 Fail criteria 9 Verification of the test results 10 Statistical analysis 10.1 General |
| 21 | 10.2 5 % fractile value with Student’s distribution 10.3 Safety factor 10.4 Example 10.5 Quantiles of the t distribution (Student’s distribution) |
| 22 | 11 Test report Table 2 – Quantiles of the t distribution (Student’s distribution) |
| 23 | 12 Modifications |
| 24 | Annex A (informative)Use of determined values A.1 Estimated snow loads and use of the determined resistance A.2 Calculate the bearable loads for different angles |
| 25 | Bibliography |
