Method and device for testing low-voltage direct-current circuit breaker

The invention discloses a low-voltage DC circuit breaker test method and device, and belongs to the field of power detection, and the method comprises the steps: S1, building a charging loop, and setting an output voltage; s2, establishing a test loop, and setting a quantitative relationship between the capacitance of the capacitor group and the inductance of the inductor group; s3, charging the capacitor bank; s4, outputting the impact current, and testing the DC circuit breaker; s5, detecting the current time constant and the port voltage and current waveform of the direct-current circuit breaker under the impact current, and obtaining the performance parameters of the direct-current circuit breaker based on the time constant and the port voltage and current waveform of the direct-current circuit breaker; s6, the residual voltage of the capacitor is released through a current-limiting resistor; and S7, repeatedly executing the steps S2-S6, and sequentially increasing the values of the impact current and the