| Description |
1 online resource (1 page) : color illustrations. |
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text txt rdacontent |
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computer c rdamedia |
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online resource cr rdacarrier |
| Series |
NREL/PO ; 5K00-68703 |
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NREL/PO ; 5K00-68703.
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| Note |
"Funding provided by U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Solar Energy Technologies Office." |
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"IEEE PVSC 2017, Washington D.C., June 25-30, 2017." |
| Funding |
DE-AC36-08GO28308 |
| Note |
Description based on online resource, PDF version; title from caption (NREL, viewed July 16, 2020). |
| Summary |
The ability of electrical insulating materials within a module to act as insulators is a key safety requirement for PV technology. Direct current breakdown voltage is therefore now specified for relied-upon insulator materials in the IEC 61730-1 safety standard. To fulfill that requirement, a new test method has been developed within the IEC TS 62788-2 backsheet standard for the measurement of breakdown voltage. The development of the test will be described, including the verification of the most critical parameters relative to factors such as defect population(s), dielectric medium, electrode size, electrode surface roughness, maximum current limit, moisture conditioning, number of replicate specimens, rate of voltage rise, specimen thickness, test polarity, and test temperature. Many of these parameters were specifically explored in discovery experiments as the test method was developed. An interlaboratory round-robin (R-R) experiment was conducted to further validate the test method by quantifying its repeatability and reproducibility. The materials examined in the R-R include the backsheet materials: polyethylene terephthalate (PET, two thicknesses), polyvinyl fluoride (PVF), and laminated PVF/PET/PVF ('TPT') as well as the encapsulants poly(ethylene-co-vinyl acetate) (EVA), and polyvinyl butyral (PVB). The precision of the test method as well as key factors contributing to the measurement will be described. |
| Subject |
Solar panels -- Testing.
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Photovoltaic cells -- Testing.
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Insulating materials -- Testing.
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Insulating materials -- Testing
(OCoLC)fst00974457
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Photovoltaic cells -- Testing
(OCoLC)fst01062165
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| Indexed Term |
DC |
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dielectric strength |
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durability |
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reliability |
| Added Author |
National Renewable Energy Laboratory (U.S.), issuing body.
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United States. Department of Energy. Office of Energy Efficiency and Renewable Energy, sponsoring body.
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| Standard No. |
1581519 OSTI ID |
| Gpo Item No. |
0430-P-17 (online) |
| Sudoc No. |
E 9.28:NREL/PO-5 K 00-68703 |
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