1.1 本实施规程涵盖了根据实施规程使用荧光紫外线灯对光伏组件或小型组件进行紫外线调节暴露的具体程序和测试条件 G151页 和 G154页 . 本规程涵盖了满足国际电工委员会（IEC）标准中发布的光伏模块或小型模块初始鉴定试验中紫外线预处理要求的试验条件。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 光伏组件和组件必须耐长期暴露在太阳辐射、湿气和热量下。聚合物组件的降解、封装材料和其他界面的分层以及水分进入是降低光伏组件输出的已知降解模式。光伏组件的IEC鉴定标准包括旨在揭示太阳紫外线辐射引起的劣化是否可能导致早期寿命失效的测试。本规程提供了关于执行符合IEC资格标准中紫外线辐射调节暴露要求的测试的一般和具体指南。 4. 其他协议也可能符合IEC测试要求。 5.2 在鉴定试验序列中，该紫外线预处理暴露在热循环和湿度冻结试验之前进行。包括这些试验是为了复制在模块中观察到的分层故障。 5. 5.3 IEC暴露方法不应视为长期风化试验。IEC光伏组件鉴定标准中的紫外线暴露试验不要求暴露在冷凝或喷水形式的水分中。在风化试验中，通常会考虑是否包含水分。 5.4 当操作条件在本标准的可接受范围内变化时，测试结果可能会发生变化。特别是，不应假设不同辐照度水平之间的退化相互作用。因此，在没有根据第节编制的随附报告的情况下，不得参考本惯例 9 这描述了使用的特定操作条件。 5.5 这种做法与实际安装中光伏组件的长期性能之间的相关性尚未确定。尽管经验表明，这些方法在筛选不稳定材料和系统方面是有效的，但目前尚不清楚是否可以通过延长本实践中所述的暴露时间和能量剂量来复制由于长时间太阳紫外线暴露引起的降解。 这种做法最有效的用途是作为评估材料和系统的比较工具。因此，建议使用性能已知的对照品或参考材料；参考实践 G151页 ，第6.2.4节。

1.1 This practice covers specific procedures and test conditions for performing ultraviolet conditioning exposures on photovoltaic modules or mini-modules using fluorescent ultraviolet lamps in accordance with Practices G151 and G154 . This practice covers test conditions that meet the requirements for UV preconditioning in initial qualification tests of photovoltaic modules or mini-modules as published in International Electrotechnical Commission (IEC) standards. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Photovoltaic modules and components must be resistant to prolonged exposure to solar radiation, moisture and heat. Degradation of polymeric components, delamination at the encapsulant and other interfaces, and moisture ingress are among the degradation modes known to decrease the output of photovoltaic modules. IEC qualification standards for PV modules include tests intended to uncover whether solar ultraviolet radiation induced degradation may cause early-life failures. This practice provides general and specific guidance on performing tests that meet the requirements of the ultraviolet radiation conditioning exposures in the IEC qualification standards. 4 Other protocols exist that may also conform to the IEC test requirements. 5.2 In the qualification test sequence, this UV preconditioning exposure is conducted prior to the thermal cycling and humidity freeze tests. These tests were included to replicate a delamination failure observed in modules. 5 5.3 IEC exposure methods should not be considered as long-term weathering tests. Exposure to moisture in the form of condensation or water spray is not a requirement of the UV exposure tests in IEC PV module qualification standards. Inclusion of moisture is typically a consideration in weathering tests. 5.4 Variation in test results may be expected when operating conditions are varied within the acceptable limits of this standard. In particular, reciprocity of degradation among varying irradiance levels should not be assumed. Consequently, no reference to this practice should be made without an accompanying report prepared in accordance with Section 9 that describes the specific operating conditions used. 5.5 Correlation between this practice and long term performance of PV modules in real-world installations has not been determined. Although experience has shown these methods are effective in screening for unstable materials and systems, it is unknown at this time if degradation due to prolonged solar ultraviolet exposure can be replicated by extending the time and energy dosage of the exposures described in this practice. The most effective use of this practice is as a comparative tool for evaluating materials and systems. Consequently, the use of controls or reference materials of known performance is recommended; refer to Practice G151 , Section 6.2.4.