IEC 61701-2020 pdf free

IEC 61701-2020 pdf free.Photovoltaic (PV) modules – Salt mist corrosion testing.
This document describes test sequences useful to determine the resistance of different PV modules to corrosion from salt mist containing Cl (NaCI, MgCI2, etc.). All tests included in the sequences are fully described in IEC 61215-2, IEC 62108, IEC 61730-2 and IEC 60068-2-52. The bypass diode functionality test in this document is modified from its description in IEC
61215-2. They are combined in this document to provide means to evaluate possible faults caused in PV modules when operating under wet atmospheres having high concentration of dissolved salt (NaCl). Depending on the specific nature of the surrounding atmosphere to which the module is exposed in real operation several testing methods can be applied, as defined in IEC 60068-2-52. Guidance for determining the applicability of this document and selecting an appropriate method is provided in Annex A.
This document can be applied to both flat plate PV modules and concentrator PV modules and assemblies.
2 Normative references
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.
IEC 60068-2-52, Environmental testing — Part 2-52: Tests — Test Kb: Salt mist, cyclic (sodium chloride solution)
IEC 61215-1, Terrestrial photovoltaic (PV) modules — Design qualification and type approval — Part 1: Test requirements
IEC 61215-2, Terrestrial photovoltaic (PV) modules — Design qualification and type approval — Part 2: Test procedures
IEC 6 1730-2, Photovoltaic (PV) module safety qualification — Part 2: Requirements for testing IEC TS 61836, Solar photo voltaic energy systems — Terms, definitions and symbols
IEC 62108, Concentrator photovoltaic (CPV) modules and assemblies — Design qualification and type approval
ISO 9223, Corrosion of metals and alloys — Corrosivity of atmospheres — Classification, determination and estimation
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC TS 61836 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http:I/www.electropedia.orgl
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Samples
Three identical samples of the model of PV module or assembly of interest shall be subjected to any of the testing sequences included in Figure 1 or Figure 2 for non-concentrator PV or concentrator photovoltaic (CPV) respectively. As the figures indicate one of these samples should be used as a control. The control sample should be used as a check every time the test samples are measured to evaluate the effect of the salt mist test.
In the case of CPV different situations for choosing the sample may occur. For non-field- adjustable focus-point CPV systems or modules, 3 modules are required to complete the testing sequence included in Figure 2. For field.adjustable focus.point CPV systems or assemblies, 3 receivers (including secondary optics sections, if applicable) and 3 primary optics sections are required to complete the testing sequence included in Figure 2. A complete description of the different types and components of CPV modules and assemblies can be found in IEC 62108,
If a full-size sample is too large to fit into the environmental chambers required for the salt mist test then a smaller representative sample may be specially designed and manufactured for this test. The representative sample should be carefully designed so that it can reveal similar failure mechanisms as the full-size one, and the fabrication process of the representative sample should be as identical as possible to the process of the full-size ones. The fact that the test has been made on representative samples and not on the full-size samples shall be reported in the test report under item 9), Clause 8.
If the PV module is provided with means for earthing then the earthing connection shall be tested as part of the module.
5 Test summary
After stabilization, tests are performed to characterize the PV module and confirm it is operational prior to the salt mist exposure. After the exposure, specimens are cleaned and allowed to recover. Then this sequence is repeated and the bypass diode functional test is performed.IEC 61701 pdf free download.