Lightning protection wiring for electronic equipment and computers before introducing UPS

Electronic equipment and computer systems working at volt-level voltage levels are susceptible to damage by lightning strikes and overvoltage
shocks caused inside and outside the equipment. For this reason, measures must be taken to prevent lightning strikes and overvoltage. In addition to installing lightning rods and lightning protection nets in buildings,
the following measures must also be taken. Figure 20-31 shows the lightning protection wiring on the AC power line
    that introduces the uninterruptible power supply UPS . Install ZGB148A-20, 220V at point B ; install ZGBls3A-60, 380V power supply arrester at point A; install ZGB235J2-24 signal arrester at point C ( computer and electronic equipment input terminal); install the antenna lead-in line into the communication machine Install ZGB003E-1 feederless arrester (not shown in the picture). The power surge arrester (protector) is composed of several protection function blocks .