The YCFK intelligent capacitor switching device uses thyristor switch and magnetic holding switch in parallel operation. It has the advantage of controllable silicon zero-crossing switch at the moment of connection and disconnection, and zero power consumption of the mag- netic holding switch during normal connection. This switch has significant advantages such as no impact, low power consumption, and high lifespan, and can replace contactors or
thyristor switches. It is widely used in low-voltage reactive power compensation systems.