Legrand surge arrester type 2 for PV systems, 600 VDC, according to EN 50539-11, Y-connection, Uoc 600V DC, discharge current Imax (8/20) 40 kA/pole. Maximum continuous voltage (Ucpv) 720 V DC. Surge protection of the DC side of a PV system. With plug-in protection module and status display: Green (SPD ready for use) Orange (replace plug-in protection module).