[1] Load Protection : 2 record(s).     Product  Qty       PRD draw-out Surge Arresters Common technical data for PRDs . frequency: 50 ... 60 Hz . operation indication by means of a mechanical indicator: white: normal operation white/red: cartridge replacement to be scheduled in the n.... click more info for more information..... Qty :   ST Surge Arresters Common technical data . frequency: 50... 60 Hz . Uc : 275 V . operation indication by means of a mechanical indicator: white: normal operation and red: surge arrester must be immediately replaced . .... click more info for more information..... Qty : [1]   Go to Top