Grade B type LV lightning surge arrester Amp:30-60KA,40-80KA, 60-100KA Pole:1P,2P, ... rail LV Grade B type withdrawable power lightning surge arrester 1. Description: surge protection device (SPD, surge protector, surge arrester) is suitable for TT, IT, TN-S ... . Best service after sale are provided. Grade B type LV lightning surge arrester