en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro

101The following parameters can effect on the correct operation of the protection:• cable length, i.e. the longer the cable the weaker the fuse protection, as the long cable limits thefault current• cable size, i.e. the smaller the cable the weaker the fuse protection, as the small cable size limits thefault current• transformer size, i.e the smaller the transformer the weaker the fuse protection, as the smalltransformer limits the fault current• transformer impedance, i.e. the higher the z k the weaker the fuse protection as high impedancelimits the fault current.The protection can be improved by installing a bigger supply transformer and/or bigger cables, and inmost cases by selecting aR fuses instead of gG fuses. Selection of smaller fuses improves theprotection, but may also affect the fuse life time and lead to unnecessary operation of the fuses.In case of any uncertainty regarding the drive protection, please contact your local ABB.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 with concentriccopper shieldMax. load currentACable typemm 2Aluminium cables with concentriccopper shieldMax. load currentACable typemm 213 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 CTechnical data