IEC+61730+Info_engl

Design qualification and type approval of PV modules acc. to IEC 61730 TÜV Rheinland Immissionsschutz und Energiesysteme GmbH Renewable Energies June 2006 2 / 5 Overview of IEC 61730(2004) The IEC 61730 consists of 2 parts: - Part 1: Requirements for module design and materials - Part 2: Safety tests Part 1 of the IEC 61730 defines the mandatory design characteristics of the modules (such as minimum distances of conductive parts from the module edges, wall thickness of the junction boxes, etc.) as well as requirements on the materials used in the module (UV- stability, temperature parameters, protection class, etc.). Certification involves checking these requirements on the basis of technical drawings and proof provided by the manufacturer. Supplementary tests may be performed in the absence of such proof. Part 2 of the IEC 61730 defines three different application classes for a module design, specifying the type of use, the related qualification tests and the resulting safety-class: - Application class A: General applications, system voltages 50 V DC safety-class II - Application class B: Restricted access, system voltages 50 V DC safety-class 0 - Application class C: Low-voltage applications ( 50V DC and 240 W) protection class III Depending on the desired application class, safety-relevant tests are conducted according to the illustrated testing tree. Tests are performed both on complete solar modules (with and without frames) and on individual module components (junction box, backside foil). A special feature of the IEC 61730 is that the test samples must be preconditioned by environmental tests of the IEC 61215/61646 (type approval of PV modules) prior to the actual safety tests. It is therefore a good idea to combine IEC 61215/61646 and IEC 61730 for the qualification, so that test samples that have already passed the environmental tests of the IEC 61215/61646 type certification can be used for the safety tests of the IEC 61730. 3 / 5 Certification and test mark To obtain a test certificate all relevant requirements on design and materials in accordance with the specifications of IEC 61730 – Part 1 as well as the respective pass criteria of the individual safety tests corresponding to IEC 61730 – Part 2 must be fulfilled. As with the type certification according to IEC 61215/61646, a test certificate always refers to the type of module on which the tests were performed. This version is supposed to represent the worst case in a PV module type family, generally defined by the following (deviations possible): - Largest module dimensions - Maximum output power - Minimum cell-, string- and edge-distances - Statically most critical module design and module mounting An issued certificate may also cover smaller, or less critical, modules of the type family with otherwise identical design (i.e. the same components and materials). Following certification with a company inspection, the TUVdotCOM test mark pictured below is issued and provided to the module manufacturer for that manufacturer s own use. The assigned individual ID number also allows direct product-related access in the global TÜV internet portal (www.tuv.com or www.tuvdotcom.com), where the certified PV module types, the corresponding test documentation and, if desired, also performance features and further product and manufacturer information are available. Qualified, IEC 61215 Qualified, IEC 61730 Periodic inspection 4 / 5 Test-tree of IEC 61730 – Part 2 (Application class A) Preconditioning 5 kWh/m² Visual Inspection MST01 10.1 Performance at STC 10.6_a (Flasher) Dielectric withstand test MST16 10.3 Wet leakage current test MST17 10.15 Performance at STC 10.6 (Flasher) Dielectric withstand test MST16 10.3 Wet leakage current test MST17 10.15 Measurement of NOCT 10.5 Measurement of temperature coefficients 10.4 Outdoor exposure 10.8 Performance at NOCT 10.6_b (Steady State) 01 16 10.2 Performance at low irridiance 10.7 (Steady State) Bypass diode thermal test MST25 10.18 Hot-spot test MST22 10.9 Dielectric withstand test MST16 01 10.2 16 17 Module brakage test MST32 Fire Test MST23* 1 special sample 1 module 1 module Performance at STC 10.6_a (Flasher) Dielectric withstand test MST16 10.3 Wet leakage current test MST17 10.15 Ground continuity test MST13 Accessibility test MST 11 Damp heat test 1000h MST 53 10.13 Thermal cycling test 200 cycles MST51a 10.11 Wet leakage current test MST17 10.15 Mechanical load test MST 34 Hail Impact test 10.18 01 10.2 16 17 01 10.2 16 17 IEC 61215 Certification terminated here Cut susceptibility test MST12 Accessibility test MST11 Visual inspction MST01 10.1 Reverse current overload test MST 26 17 01 13 16 17 Impulse voltage test MST 14 01 16 UV- preconditioning MST 54 / 10.10 Thermal cycling test 50 cycles MST 51b / 10.11 Humidity freeze test MST 52 / 10.12 Robustness of terminations test MST 42/10.14 01 10.2 16 Wet leakage current test MST17 10.15 Performance at STC 10.6_a (Flasher) Dielectric withstand test MST16 10.3 Wet leakage current test MST17 10.15 4 modules 1 laminate IEC 61215 IEC 61730 Module safety test MST The numbers in each box are references to final measurements, that are to be performed after MST or MPT (if required). In this example: MST 01 = Module safety test MST 01 10.2 = Performance test (IEC 61215, Ed. 2) *MST 23 cannot be performed at TIE laborities yet Module performance test 1 laminate (module) 2 Modules 1 laminate (module) 2 small test samples ** IEC61730 test sequence after completed IEC61215 Cert. 01 10.2 16 01 10.2 16 01 10.2 16 17 01 10.2 16 17 01 10.2 16 17 01 10.2 16 Dielectric withstand test MST16 Dielectric withstand test MST16 Performance at STC 10.6 (Flasher) Dielectric withstand test MST16 10.3 Wet leakage current test MST17 10.15 Bypass diode thermal test MST25 10.18 01 10.2 16 17 Temperature test MST21 Performance at STC 10.6_a (Steady State) Visual Inspection MST01 10.1 1 Modul 3 small test samples ** Accessibility test MST 11 2 modules ** Temperature test MST21 5 / 5 Overview of qualification tests according to IEC 61730 – Part 2 (Application class A) Code Test name Test description / Pass criteria MST 01 Visual inspection According detailed inspection list MST 11 Accessibility test Resistance always 1 M Ω between test fixture (acc. IEC 61032) and module life parts MST 12 Cut susceptibility test Meet insulation requirements after defined cutting on module backside film MST 13 Ground continuity test Resistance 700 W/m² irradiation, wind speed 700 W/m² irradiance in worst-case hot-spot condition MST 23 Fire test Proof according to ANSI/UL790, that the module meet the minimum fire resistance rating of Class C MST 25 Bypass diode thermal test Asses adequacy of thermal design of by-pass diodes at a current of 1.25 x Isc running through the diodes at module temperature of 75°C MST 26 Reverse current overload test Reverse current through the module equal to 135 % of the module’s over-current protection rating for 2 hours MST 32 Module breakage test Mechanical impact by a test-bag with a weight of 45,5 kg (ca. 540 J kinetic energy); Requirements for breakage (shards 6,5 cm²) MST 33 Conduit bending test Test of the ability of a possible conduit fixed to the junction box to withstand a bending force (220 to 49 N, depending on diameter) MST 42 Robustness of Terminations As in IEC 60068-2-21 MST 44 Terminal knockout test Test of the suitability of terminal knockouts MST 51 a/b Thermal Cycling 50 and 200 cycles -40°C to +85°C MST 52 Humidity Freeze Test 10 cycles -40°C to +85°C, 85% RH MST 53 Damp Heat 1000 h at +85°C, 85% RH MST 54 UV-exposure test Min.15 kWh/m² UV-radiation (280 - 400 nm) with 7.5 kWh/m² UV- radiation (280 - 320 nm) at 60°C module temperature