IEC TS 62915:2018 pdf download

IEC TS 62915:2018 pdf download.Photovoltaic (PV) modules – Type approval, design and safety qualification – Retesting
1 Scope
This document sets forth a uniform approach to maintain type approval, design and safety qualification of terrestrial PV modules that have undergone, or will undergo modification from their originally assessed design. Changes in material selection, components and manufacturing process can impact electrical performance, reliability and safety of the modified product. This document lists typical modifications and the resulting requirements for retesting based on the different test standards. It provides assistance; at some level engineering judgement may be needed. The test sequences are selected to identify adverse changes to the modified product. Those products successfully following the herein defined test sequences are considered to be compliant with the standard against which they have originally been assessed in a full qualification. The number of samples to be included in the retesting program and the pass/fail criteria are listed in the referenced standards IEC 61 21 5 and IEC 61 730. Tests required by changes from previous to new standard editions of IEC 61 21 5 and IEC 61 730 are not covered by this document and are evaluated separately.
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 61 21 5 (all parts), Terrestrial photovoltaic (PV) modules – Design qualification and type approval IEC 61 21 5-1 :201 6, Terrestrial photovoltaic (PV) modules – Design qualification and type approval – Part 1: Test requirements IEC 61 21 5-2:201 6, Terrestrial photovoltaic (PV) modules – Design qualification and type approval – Part 2: Test procedures IEC 61 730 (all parts), Photovoltaic (PV) module safety qualification
4 Retesting
4.1 General This clause is separated into one subclause each for crystalline silicon and for thin-film technologies. The document is organized by major modification headings with specific supporting examples and parenthetical reference to the specific clauses of the relevant IEC standards. Any change in the design, materials, components, material combinations, manufacturers or processing of the PV module type family from the last tested version may require a repetition of some or all of the qualification tests according to the clauses that follow in order to maintain type and safety approval. For any change in material specification, including, e.g., electrical, optical, mechanical properties, the nominal values and tolerances shall be considered. For any assessment of a new thickness or dimension, the initially tested thickness or dimension shall be used as reference. Any variation of a parameter may be assessed as change if the new value is out of the tolerance from the nominal value of this parameter. Materials in direct contact with each other shall be tested in all applicable combinations. The required test items shall be selected only from those tests which are applicable for change of both materials. An example for an assessment procedure is given in Annex A, Clause A.4. The number of samples to be included in the retesting program and the pass criteria are to be taken from the relevant clause/subclause of the referenced standards (‘pass criteria’). Each PV module delivered for retesting shall be subjected to electrical stabilisation (MQT 1 9), as applicable by the relevant type approval standard. All initial measurements as listed in the referenced standards shall be performed before the specific tests.