... module. Product DescriptionNS1-(D, C, B) 5 series surge protection device (in short: SPD, alias: surge suppressor, surge arrester) is ... and Installation PositionNS1-(D, C, B)5 surge protective device is applicable for D,C,B grade lightening-proof, ... boards, computer equipment, frequency conversion equipment, operating room, custody, electronic equipment etc. and in the socket box in control equipment ...