... 50/60Hz and 380V power supply system, such as TN-S, TN-C-S, TT, IT, etc. The products function as equipotential connection ... telecom machinery center, computer equipment center, elevator control center, hospital's surgery and ICU, information equipment, electronic equipment and in front ... maximum current endurance by lightning stroke is 20KA (8/20μs)3. response time less than 25ns.4.with warning ...