Technical data100The following parameters may effect on correct the operation of the protection:ï cable length, i.e. the longer the cable the weaker the fuse protection, as the longcable limits the fault currentï cable size, i.e. the smaller the cable the weaker the fuse protection, as the smallcable size limits the fault currentï transformer size, i.e the smaller the transformer the weaker the fuse protection,as the small transformer limits the fault currentï transformer impedance, i.e. the higher the zk the weaker the fuse protection ashigh impedance limits the fault current.The protection can be improved by installling a larger supply transformer and/orbigger cables, and in most cases by selecting aR fuses instead of gG fuses.Selection of smaller fuses improves the protection, but may also affect the fuse lifetime and lead to unnecessary operation of the fuses.In case of any uncertainty regarding the drive protection, please contact your localABB.Cable typesThe table below gives copper and aluminium cable types for different load currents.Cable sizing is based on max. 9 cables laid on a cable ladder side by side, ambienttemperature 30 ∞C, PVC insulation, surface temperature 70 ∞C (EN 60204-1 andIEC 60364-5-52/2001). For other conditions, size the cables according to localsafety regulations, appropriate input voltage and the load current of the drive.Copper cables withconcentric copper shieldAluminium cables withconcentric copper shieldMax. loadcurrentACable typemm2Max. loadcurrentACable typemm213 3◊1.5 61 3◊2518 3◊2.5 69 3◊3524 3◊4 83 3◊5030 3◊6 107 3◊7042 3◊10 130 3◊9556 3◊16 151 3◊12071 3◊25 174 3◊15088 3◊35 199 3◊185107 3◊50 235 3◊240137 3◊70 274 3 ◊ (3◊50)167 3◊95 260 2 ◊ (3◊95)193 3◊120223 3◊150255 3◊1853BFA 01051905 C
