Surge Protector Selection Criteria - Choosing The Wrong One Is Costly And Laborious

I believe that readers are familiar with surge protectors, which play a pivotal role in our internal lightning protection. However, many readers must be confused about how to choose a suitable surge protective device according to their own situation. Today, the editor will introduce the selection criteria of surge protection device to everyone, and hope that everyone will have a rough understanding of the selection of surge protectors after reading.

Selection criteria of surge protectors. Before choosing a suitable surge protector, we need to understand the classification criteria of surge protectors. Surge protectors are usually divided into three levels: level I, level II, and level III according to lightning protection zones. Among them, level I surge protectors are the first level of protection for internal lightning protection. They have to withstand a lightning impulse current with a longer wavelength (i.e., a long duration); level II surge protectors are the second level of protection for surge protectors. The lightning current they withstand is the maximum discharge current with a shorter wavelength than the lightning impulse current; and level III surge protectors are the third level of protection, and the lightning current at this time has been reduced twice.

Selection criteria for surge protectors. After understanding the classification of surge protectors, the following editor will teach you how to choose surge protectors according to the installation location. The main function of Class I surge protectors is current discharge, so they are often installed in areas in lightning protection zones that are more seriously affected by direct lightning induction, such as the low-voltage side of household transformers. The main function of Class II surge protectors is voltage limiting, so they are installed in areas in lightning protection zones that have undergone one current discharge protection, such as distribution cabinets on each floor. The main function of Class III surge protectors is not current discharge and voltage limiting, so they are installed at the AC incoming line end of electronic information equipment.