... 1.5KV 20KA 3P+N 4P Surge Protective Device SPD More other Feature:Modeule design, convenient installation ... fast response time,low residual voltageWith remote conection,can realize remote controlIndicate alarm display,green(normal),red(malfunction ... ²DIN railProduct application and installation position Surge Protective Device used to find equipotential connection, installed on LPZ1 ...