... arrester) is suitable for TN-S, TN-C-S, TT, IT etc. power supply system of AC 50/60Hz, <380V ... , installed on the joint of LPZ1 or LPZ2 and LPZ3, it's designed according ... the module of surge protection device. \When the SPD fails in breakdown for over-heat and overcurrent, the ... PositionNS1-(D, C, B)5 surge protective device is applicable for D,C,B grade lightening-proof, installed on ...