SPD Surge protective Device

SPD Surge protective Device Uesd in A.C 50HZ/60HZ,380V/under T/T.TN-S. TN-C-S etc.power supply system. provides protection against surgecurrent resulted from direct or indirectlightning strike or similar surge voltage. The product, using metal oxide varistor, designed to protect both phase and neutral line, is of high electricity resistance under normal operations. In case of surge current or voltage caused by lightning strike or similar, SPD functions quickly to conduct the surge voltage/current toearth and thus effectively prevent the downstream equipments of its protected line from destruction.SPD resumes its high electricity resistance to secure normal operation of theprotected powernetwork without presence of thesurge voltage. CONSTRUCTION AND FEATURE Plug-in type functionunit makes easy replacement On-off indicating window Quick response less than25ms TECHNICAL DATA Pole No.: 1,2, 3, 4 Frequency: 50/60Hz Pillar terminal with clamp On-Off indicating window: Green: normal function Red: functionless, immediate replacement required Connection capacity: rigidconductor 25mm2 Standards: IEC61643-1 Category SPD9-A SPD9-B SPD9-C SPD9-D SPD9-E Rated voltage Un 220 220 220 380 380 Max. continuous operating voltage Uc (V) 320 320 320 420 460 Voltage protection level Up (KV) 1 1.2 1.5 2.0 2.3 Nominal discharge current In (8/20μs) 5 10 20 30 40 Rated varistor voltage (v) 510±10% 510±10% 510±10% 510±10% 510±10% Max. discharge current (8/20μs) (Imax) 10KA 20KA 40KA 60KA 70KA Response time (ms) 25 Power withstand (J)(2ms) 300 390 640 1500 1580 Ambient temperature -24+80 Function unit color Deep yellow Light yellow Light grey Brown Red Min. Terminal connection (mm2) Neutral 2.5 ,earth 4