... 4(+NPE) 3.IEC61643-1,GB18802.1 Product Features1.Inside over-current and our-head protection,temperature control open ... leak current, response quickly, less residual voltage;4.Signal indication device, green(normal), red(abnormal);5.Highly energy, clearance discharge ... ). Application Scope and Installation PositionLY2-C series surge protective device according to GB18802.1-2002, installed on the joint ...