Safety precautions for handling faulty capacitors by Beijing capacitor manufacturer

Beijing capacitor manufacturer thinks that to deal with the fault capacitor, the circuit breaker of the capacitor should be disconnected, the isolating switch of both circuit breakers should be opened, and the capacitor bank should be discharged by discharge resistance.

After the capacitor bank is discharged by the discharge resistance (discharge transformer or discharge voltage transformer), because part of the residual charge can not be discharged completely for a time, a manual discharge should be carried out. When discharging, first connect the grounding end of the grounding wire, and then discharge the capacitor with the grounding rod for many times until there is no discharge spark and discharge sound, and then fix the grounding end.

As the faulty capacitor may lead to poor contact, internal broken wire or fuse fusing, some charges may not be discharged completely. Therefore, before contacting the faulty capacitor, the maintenance personnel should also wear insulating gloves, and use short circuit to connect the two poles of the faulty power capacitor first, and then dismantle and replace it.

The neutral line of capacitor bank with double star connection and the series connection of multiple capacitors shall be separately discharged.

Conclusion: capacitor is a kind of electrical apparatus with weak reliability among all kinds of equipment in substation. Its insulation is weaker than that of other equipment with the same voltage. The internal components have more heat, but the heat dissipation is not good. There are many internal failure opportunities. The combustible composition of the materials used to manufacture power capacitor is large, so it is easy to catch fire during operation. Therefore, good low temperature and ventilation conditions should be created as far as possible for the operation of power capacitors.