Handling the faulty power capacitor should be done by disconnecting the circuit breaker of the capacitor, pulling apart the two isolation switches of the circuit breaker, and discharging the capacitor bank after discharging through the discharge resistor. After the capacitor bank is discharged through the discharge resistor (discharge transformer or discharge voltage transformer), a manual discharge should be performed because some of the residual charge is not discharged at one time. When discharging, first connect the grounding terminal of the grounding wire, and then discharge the capacitor several times with the grounding rod until there is no discharge spark and discharge sound, then fix the grounding end. Since the faulty capacitor may have poor lead contact, internal disconnection or fuse blow, some of the charge may not be exhausted, so the maintenance personnel should wear insulated gloves before touching the faulty capacitor. The capacitors are short-circuited and then removed and replaced. For the neutral line of a double-star-connected capacitor bank, and the string wiring of multiple capacitors, discharge should also be performed separately. Summary: Capacitors are among the various devices in the substation, which are relatively weak in reliability. They are weaker than other devices of the same voltage, and the internal components are more hot, and the heat dissipation is not good. Many of the materials used in the manufacture of power capacitors have large combustible components, so they are very easy to catch fire during operation. Therefore, the operation of the power capacitor should create as good a low temperature and ventilation as possible.