The core standard for conducting power frequency withstand voltage tests on circuit breakers in rural lighting electrical ready Board Box in Africa is not less than 60 seconds (1 minute) in duration.
Following internationally recognized standards: Electrical standards in many African countries typically adopt or reference the standards of the International Electrotechnical Commission (IEC). According to standards such as IEC 60947 series (low-voltage switchgear and control equipment) and IEC 61439 (low-voltage switchgear), for the power frequency withstand voltage test of low-voltage electrical appliances (such as circuit breakers in electrical ready boards), the duration of the applied test voltage is usually required to be 60 seconds. This time is sufficient to effectively verify the reliability of the main insulation of the electrical appliance and detect whether there is breakdown or flashover.
Application of Standards in Africa: The African Committee for Electrotechnical Standardization (AFSEC) and the World Bank's "Guidelines for the Application of Standards in Rural Electrification in Africa" emphasize that safe and reliable international standards should be prioritized for rural electrification projects. At the same time, many African countries (such as Nigeria, Kenya, Rwanda, etc.) require products (including circuit breakers) to be tested according to national standards based on IEC when implementing mandatory conformity assessments (such as SONCAP certification in Nigeria and PVOC certification in Kenya), which explicitly include a 60 second withstand voltage test requirement at 1500V or higher voltage.
Technical rationality: A duration of 1 minute (60 seconds) is a common practice in the field of electrical safety testing. During this period, the performance of insulation materials under high voltage can be observed steadily. If there are weak links or defects in the insulation, breakdown or excessive leakage current usually occurs within a few tens of seconds.

In summary, in the application scenario of rural lighting electrical ready boards in Africa, when conducting power frequency withstand voltage tests on circuit breakers, the general standard of not less than 60 seconds should be strictly followed to ensure the personal safety and power supply reliability of the equipment during subsequent operation. The specific test voltage value needs to be determined based on the rated insulation voltage of the circuit breaker and relevant product standards.