Abstract: In this study, a control cabinet for a standby diesel generator set in a nuclear power plant was designed, and in order to verify the ability of the control cabinet to meet high safety and reliability standards, an electrostatic discharge immunity test and a radiofrequency electromagnetic field radiation immunity test were designed in accordance with the IEC 61000 series of standards. The test results show that the control cabinet meets or exceeds the international standard requirements in all the tests, and shows excellent anti-interference performance and stability, which can ensure the reliability of power supply of the nuclear power plant in emergency situations, and provides an important reference for the design and operation and maintenance management of nuclear power plant equipment.