The handling of the faulty capacitor should be done after disconnecting the circuit breaker of the capacitor, opening the isolation switches on both sides of the circuit breaker, and discharging the capacitor bank. After the capacitor bank is discharged by the discharge resistor, the discharge transformer or the discharge voltage transformer, because part of the residual charge can not be discharged for a while, the grounding terminal should be fixed, and then use the ground rod to discharge the capacitor several times until there is no spark or discharge sound. , And then fix the grounding clamp. Since the faulty capacitor may have poor lead contact, internal disconnection or fuse, there may still be some charges that have not been discharged. Therefore, the maintenance personnel should wear insulated gloves and short-circuit the faulty capacitor before touching the faulty capacitor. When the two poles are short-circuited, they should be discharged separately.