In rural areas of Africa, lighting electrical ready boards need to cope with extreme environmental challenges, with seismic and corrosion resistance being particularly critical. The extreme environmental testing plan for electrical ready boards is explained from three aspects: technical verification, material selection, and testing standards.

The seismic performance verification requires simulating the common seismic activity on the African continent. According to the IEC 60068-3-3 standard, the electrical ready board needs to pass a 2G seismic test, with a horizontal acceleration of 0.4g and a vertical acceleration of 0.2g, and a structural safety factor of ≥ 1.67. In the test, anti loosening designs such as double nut fixation and elastic support were used to ensure that components (such as circuit breakers and switches) did not loosen or fall off under 10-2000Hz broadband vibration, and that the busbar support insulator did not crack. The reliability of its mechanical structure was verified by simulating 10-50Hz highway transportation vibration and IEC 61373 Class B earthquake vibration.

The verification of anti-corrosion performance needs to cover high temperature and humidity, salt spray corrosion, and sand and dust erosion environments in Africa. The outer shell of the electrical ready board should be made of PC material, and the outer stainless steel electrical ready board should meet the requirements of non corrosive welding interfaces and coating thickness ≥ 12 μ m in salt spray testing. At the same time, silicone rubber sealing strips (compression ratio ≥ 30%) and IP54 protection level are used to prevent sand and dust from entering.

The testing standards and implementation need to be combined with international and industry standards. The environmental adaptability test follows the IEC 60068 wet heat cycle standard, and lasts for 96 hours in a 40 ℃, 95% RH environment with an insulation resistance of ≥ 10M Ω. The electrical performance test follows the IEC 61439-2 standard, and the 1000V AC system can withstand 4kV/1-minute power frequency withstand voltage. Third party testing agency (using helium mass spectrometry leak detection method to verify that the cabinet leakage rate is ≤ 10 ⁻⁹ mbar · L/s, ensuring sealing. Ultimately, the electrical ready board needs to undergo 6-12 months of on-site trial operation in typical African scenarios (such as rainforests in African basins), recording temperature and humidity, vibration data, and fault frequency to optimize the design.