IEC 60904-3:20 19 RLV包含官方IEC国际标准及其红线版本。Redline版本不是官方文档，它只有英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 ？ IEC 60904-3:20 19描述了确定光伏设备电输出的基本测量原理。本文件中给出的原则旨在将PV器件的性能等级与通用参考地面太阳光谱辐照度分布联系起来。本文件中给出了参考地面太阳光谱辐照度分布，以便根据IEC 60904-9中包含的光谱性能要求对太阳模拟器进行分类。本标准中包含的原则涵盖了自然和模拟阳光下的测试。与上一版相比，此新版本包括以下重大技术变更: a)由于第三版中一些微小的计算和舍入误差，所有光谱数据都被重新计算；全球光谱辐照度完全恢复到第二版的数据； b)阐明了辐照度的角分布。

IEC 60904-3:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
？ IEC 60904-3:2019 describes basic measurement principles for determining the electrical output of PV devices. The principles given in this document are designed to relate the performance rating of PV devices to a common reference terrestrial solar spectral irradiance distribution. The reference terrestrial solar spectral irradiance distribution is given in this document in order to classify solar simulators according to the spectral performance requirements contained in IEC 60904-9. The principles contained in this standard cover testing in both natural and simulated sunlight. This new edition includes the following significant technical changes with respect to the previous edition:
a) all spectral data were recalculated due to some minor calculation and rounding errors in the third edition; the global spectral irradiance returned to exactly the data of the second edition;
b) the angular distribution of the irradiance was clarified.