... ,High energy MOV 3,thermal disconnectors,failure indicator. surge protector 1,solar system (photovoltaic power system). 2,High ... disconnectors,failure indicator. surge protector photovoltaic power system surge protection deviceTNT-S40 DC surge protective device, protect against lightning surge voltages in solar ... DC network).LT-S40 DC series are available for the network voltage: 500,800 and 1000Vdc. ...