Class B and Class C lightning protection for power systems

The lightning protection of power supply system is generally divided into Class B protection and Class C protection. The important role of Class B protection is to deal with the disturbance of the strong lightning electromagnetic pulse and withstand the flash of direct lightning. The important role of Class C protection is to achieve the fine protection task after Class B rough protection, and limit the transient overvoltage of the power supply system to the allowable range of electrical insulation. Generally, the harmony of these two levels can greatly improve the lightning protection level of the power supply system and make the equipment more comfortable and stable in the thunderstorm and drought season