SP1-D series SPD is suitable for TT, IT, TN-S, TN-C-S power supply system with AC 50/60Hz, 230/400V and below. Its design based on IEC6143-1, GB18802.1 and GB50057 standard requirements, can discharge 20KA lightning over current, normally installed at the incoming low voltage distribution board of buildings.

D type lightning current SPD used as equipotential connection during lightning, installed at junction area of LPZ1, LPZ2 and LPZn zone, normally installed at the front of distribution box of residence, computer center, information equipment, electronic equipment and control equipment or in the nearest socket box.