High-voltage shunt capacitor devices mainly include the following equipment: high-voltage shunt capacitors, series reactors, discharge coils, zinc oxide arresters, isolation grounding switches, frames, bus bars, connecting wires, post insulators, cabinets or fences, etc. The capacitor device switching circuit breaker and its protection device and controller can be included in the supply according to the needs. 

High-voltage shunt capacitor devices are mainly used in power frequency three-phase AC power systems to improve system power factor, reduce transformer and line losses, improve grid voltage quality, and increase equipment utilization.