... 5. 1,2,3,4P(+NPE) PV Photovoltaic system SPD1.According IEC61643-1 2.C grade ... Surge Protector,Surge Protective Device,Surge Protection,Photovoltaic (PV) SPD,PV Surge Protection Surge Protection ... designed to protect against lightning surge voltages in photovoltaic power supply networks. These units must be installed ... is available for the main operating voltages in photovoltaic: 1000 Vdc. The use of SUN-S40 ...