Environmental Test Chambers for IEC 61730-2
Shanghai Linpin company Photovoltaic module UV environmental test chamber in mainly applied in assessing PV panel’s UV resistant ability when it exposes to UV irradiation environmental. It is suitable for evaluating the UV resistant performance of polymeric material and protective layer. Numerous accelerated corrosion tests may be performed in the Shanghai Linpin UV aging climate chambers, including IEC 61730-2.
The scope of IEC 61730-1 is also applicable to this part of IEC 61730. While IEC 61730-1 outlines the requirements of construction, this part of the standard lists the tests a PV module is required to fulfill for safety qualification. IEC 61730-2 is applied for safety qualification only in conjunction with IEC 61730-1.
The sequence of tests required in this standard may not test for all possible safety aspects associated with the use of PV modules in all possible applications. This standard utilizes the best sequence of tests available at the time of its writing. There are some issues - such as the potential danger of electric shock posed by a broken PV module in a high voltage system- that should be addressed by the system design, location, restrictions on access and maintenance procedures.
The objective of this standard is to provide the testing sequence intended to verify the safety of PV modules whose construction has been assessed by IEC 61730-1. The test sequence and pass criteria are designed to detect the potential breakdown of internal and external components of PV modules that would result in fire, electric shock, and/or personal injury.
The standard defines the basic safety test requirements and additional tests that are a function of the PV module end-use applications. Test categories include general inspection electrical shock hazard, fire hazard, mechanical stress, and environmental stress.
The additional testing requirements outlined in relevant ISO standards, or the national or local codes which govern the installation and use of these PV modules in their intended locations should be considered in addition to the requirements contained within this standard.
The hazards described in the following subclause might influence the safety of PV modules.n accordance with these hazards, test procedures and criteria are described. The specific tests to which a PV module will be subiected will depend on the end-use application for which the minimum tests are specified in Clause 5.
The specific tests to which a PV module will be subjected, depending on the Class defined in EC 61730-1 referring to IEC 61140. are described in Table 6. The order in which the tests are carried out shall be in accordance with Fiqure 1. Some tests shall be carried out as preconditioning tests.
Nine PV modules and one unframed PV module are used for safety testing (plus spares as desired). In order to prove reduction of Pollution Degree to PD 1, one additional PV module is required.
If cemented joints are to be qualified the following is required:
An unframed PV module is tested in sequence B (one additional unframed PV module is required) for alass/flexible or flexible/flexible. For glass/glass constructions 20 additional samples according to 10.25.2 are required for the lap shear strength test (MST 36) to prove cemented joints.
All specimens shall be technically identical (same components), For MST 24. MST 32. and MST 37 PV modules complete in every detail, but not functioning or of low power, etc., are acceptable.
All test specimens except for MST 24, MST 32. MST 35. MST 36. and MST 37 shall be taken at random from a production batch or batches. Additional PV modules for MST 23 might be necessary (PV modules complete in every detail, but not functioning or of low power, etc., are acceptable).
The PV modules shall have been manufactured from specified materials and components in accordance with the relevant drawings and process sheets and have been subjected to the manufacturer's normal inspection, quality control and production acceptance procedures. The V modules shall be complete in every detail and shall be accompanied by the manufacturer's handling, mounting, and connection instructions.
When the PV modules to be tested are prototypes of a new design and not from production, this fact shall be noted in the test report (see Clause 7). The PV modules shall be divided into groups and subjected to the safety tests shown in Figure 1, carried out in the order specified. The PV modules shall be selected such that the environmental stress tests of 4.2 are met. Each box in Figure 1 refers to the corresponding subclause as described in Clause 4.
Spare PV modules may be included in the safety test program provided that they have been appropriately environmentally tested to meet the necessary prerequisites.
Test procedures and criteria, including initial and final measurements where necessary, are detailed in 10.2 through 10.33. Some tests are identical to tests in IEC 61215-2 and are referenced in Clause 4. In carrying out these tests, the manufacturer's handling. mounting.and connection instructions shall be strictly observed.
The PV module for sequence B shall be irradiated during the first 60 kWh/m2 cvcle from the front side of the specimen and from the backside during the second 60 kWh/m2 cycle (MST 54). By doing so, the front side and back side of the PV module will be exposed to the same UV dose. The intermediate control measurements (MST 01, MST 16, MST 17) after each stress test are informative and may be skipped. Final measurements are required.
The wait time (48 h to 96 h) at the end of the sequence shall ensure that a minimum time between the immediate control inspection after completion of each environmental test (time counter starts after completion of MST 51, MST 52 and MST 53) and a second visual inspection is maintained. This is due to possible variation in visual defects apparent a few hours versus several days after an environmental stress test. The wait time does not apply to any other control check other than the visual inspection.
The tests in sequence F may be performed on separate modules. The tests for MST 21 and MST 25 may be performed on specially prepared samples (e.g, thermocouples within the laminate or junction box). If any of the individual tests of the sequence impacts the outcome of one of the subsequent tests, a separate sample shall be used. Potential impact on module output can be verified by MST 02.
The number of PV modules required for the fire test MST 23 will depend on the relevant test procedure.
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