The rated short-time withstand current of rural lighting electrical ready boards in Africa needs to be comprehensively determined based on the current situation of the local rural power grid and the characteristics of short-circuit faults. The core standard is not less than 15kA (duration of 1s), and it needs to be increased to 20-25kA in special scenarios. It can withstand the impact of short-circuit current and adapt to the light load requirements of rural lighting, avoiding cost waste caused by high parameters or equipment damage caused by insufficient parameters.

The rural power grid in Africa is mainly composed of medium and low voltage overhead lines, which belong to low current grounding systems. Single phase grounding faults are common, and if the fault is not dealt with in a timely manner, it is easy to develop into two-phase arc short circuits, generating large short-circuit currents. At the same time, the local power grid infrastructure is relatively weak, the laying of lines is not standardized, the incidence of short circuit faults is higher than in cities, and the fault current fluctuates greatly. Therefore, the electrical ready board needs to have sufficient dynamic and thermal stability performance.

The rated short-time withstand current is a key indicator for a electrical ready board to withstand short-circuit faults, referring to the ability of the equipment to withstand the impact of short-circuit current within a specified time without damage. Considering the single load and low current characteristics of rural lighting in Africa, a basic standard of 15kA/1s can meet the short-circuit current tolerance requirements of most villages; If the village is close to distribution transformers, with dense lines and high peak short-circuit current, a 20-25kA electrical ready board should be selected to ensure that the cabinet, busbar, and electrical components do not deform or burn out during a short circuit.

In addition, the electrical ready board needs to be equipped with protective components that match the withstand current to quickly cut off short-circuit faults and prevent the fault from expanding. Simultaneously following relevant standards, ensuring that the shell protection and insulation performance meet the standards, and adapting to the complex outdoor environment in rural areas. Reasonably setting the rated short-time withstand current can not only ensure the safety of rural lighting power supply in Africa, but also take into account economy, and help the stable development of local rural power infrastructure.