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The charging section uses a constant-current charging device consisting of an insulated cylindrical oil-immersed charging transformer. The primary voltage is 220V, the secondary voltage is 80kV, and the rated capacity is 5kVA. The transformer is well-sealed with no oil leakage； A 2DL-200kV/100mA high-voltage rectifying silicon stack is used ； The charging polarity is automatically switched by the motor drive ； The protection resistor for high-voltage rectifier silicon stacks is made of enameled resistance wire wound densely on an insulating tube ； The impact generator body uses an asymmetric voltage multiplication charging method, with a rated output voltage of ±150 kV ； The constant-current charging device ensures that the deviation between the actual charging voltage and the set voltage within the range of 20% to 100% of the rated charging voltage is no more than ±1%, the instability of the charging voltage is no more than ±1%, and the adjustable accuracy of the charging voltage is 1% ； The DC resistance voltage divider uses 150 kV, 300 MΩ oil-immersed metal film resistors; the resistor of the low-voltage arm is installed within the bottom flange of the voltage divider, and the voltage signal from this low-voltage arm is transmitted to the control console via a shielded cable. The automatic grounding switch uses an electromagnet-based mechanism for connecting and disconnecting grounding, and it can automatically ground the main capacitor through a protection resistor when testing is stopped. The inductors and capacitors for constant-current charging are installed inside the control console, while the charging transformer, high-voltage rectifier diodes, protection resistors, automatic polarity-changing device, automatic grounding switch, and insulating posts are mounted on a mobile chassis.