This series of surge protectors is suitable for AC 50/60Hz, 380V and below supply systems such as TT, IT, TN-S, and TN-C-S, and can serve as equipotential bonding at the interfaces of LPZ1, LPZ2, and LPZ3 zones. The design complies with IEC61643-1, GB18802.1, and the housing is designed to be mounted on a 35mm busbar. This product features an internal failure disconnection device, which automatically disconnects the surge protector from the power grid in case of overcurrent, overheating, or breakdown, while the visible alarm indicator module changes from green (normal) to red.