UL 62093-2017 pdf free download

UL 62093-2017 pdf free download.Balance-of-System Components for Photovoltaic Systems — Design Qualification Natural Environments.
The purpose of this test is to determine the ability of the component to withstand exposure to ultra-violet
(UV) radiation.
11.10,2 Apparatus
The apparatus consists of the items listed below,
a) A temperature controlled test chamber or other arrangement with a window or fixtures for a UV light source and the component under test. The chamber shall be capable of maintaining the component temperature at 60 °C ± 5 °C and a dry condition.
b) A UV light source capable of producing UV radiation with an irradiance uniformity of ±15 % over the test plane of the component and capable of providing the necessary total irradiance in the different spectral regions of interest as defined in item c) of 11.10.3. The final test report shall indicate which UV light source is used.
c) Means for measuring and recording the temperature of the component to an accuracy of ±2 °C. The temperature sensors shall be attached to the front or back surface of the component near the middle. If more than one component is tested simultaneously, it will suffice to monitor the temperature of one representative sample.
d) A calibrated radiometer capable of measuring the irradiance of the UV light produced by the UV light source at the test plane of the component(s).
See IEC 61345 for suggested UV light sources.
11.10.3 Procedure
The test shall be carned out according to the procedure outlined below.
a) Use the calibrated radiometer to measure the irradiance at the proposed component test plane and
ensure that, at wavelengths between 280 nm and 400 nm, the test spectral irradiance is never more than
5 times the corresponding standard spectral irradiance specified in the standard AM 1.5 solar irradiance
disinbution given by Table 1 of IEC 60904-3, that there is no appreciable irradiance at wavelengths below
280 nm and that it has a uniformity of ±15 % over the test plane.
b) Mount the component in the test plane at the location selected in a) with the most critical side (for example, the side with the most wire or cable penetrations) normal to the UV irradiance beam.
C) While maintaining the component temperature within the prescribed range, subject the component to a minimum irradiance of
— 7,5 kWh.m in the wavelength range between 280 nm and 320 nm, and.UL 62093-2017 pdf free download.