The CKSC type dry core series reactor is an important supporting equipment for reactive power compensation devices in power systems. After being connected in series with dry iron core reactors, power capacitors can effectively suppress high-order harmonics in the power grid, limit closing inrush currents and operating overvoltage, improve the voltage waveform of the system, increase the power factor of the power grid, and play a significant role in the safe operation of power capacitors and other power equipment.