... C Surge Protector,SPD,Surge Arrester,Lightning Surge Protector,Surge Protective Device,Surge Protection,Photovoltaic (PV) SPD,PV Surge Protection Product ... against lightning surge voltages in photovoltaic power supply networks. These units must be installed in parallel on the DC networks to ... DC network).] Basic Circuit Diagram Solar 3P PV SPD (suger protective device)