Citel ds50vgpv g51 type 2 pv surge protectors citel ds50vgpv 600g51 citels ds50vgpv 600g51 is a type 2 surge protector designed to protect against lightning surge voltages in 600v dc photo voltaic power supply networks it incorporates citels exclusive patented vg technology guaranteeing a total absence of leakage current and maximum reliability citel ds50vgpv 600g51 pv surge protector type 2 600vdc remote signal option