Nidec Digitax ST Series Installation Manual

Nidec Digitax ST Series Installation Manual Manual pdf 28 page image

28 Digitax ST Installation GuideIssue: 74.3 RatingsTable 4-1 Fuse ratings and cable sizesUse 105 °C (221 °F) (UL 60/75 °C temp rise) PVC-insulated cable with copperconductors having a suitable voltage rating, for the following power connections:• AC supply to external EMC filter (when used)• AC supply (or external EMC filter) to drive• Drive to motor• Drive to braking resistor• When operating in ambient >45 °C UL 75 °C cable should be used.Cable sizes are given for guidance only and may be changed depending on theapplication and the method of installation of the cables.The mounting and grouping of cables affect their current capacity, in some cases alarger cable is required to avoid excessive temperature or voltage drop.Input cable sizes should generally be regarded as a minimum, since they have beenselected for co-ordination with the recommended fuses.Output cable sizes assume that the maximum motor current matches that of the drive.Where a motor of reduced rating is used the cable rating may be chosen to match thatof the motor.To ensure that the motor and cable are protected against overload, the drive must beprogrammed with the correct motor rated current.The terminals are designed for a maximum cable size of 4.0 mm 2 (minimum 0.2 mm 2 /24AWG).Where more than one cable per terminal is used the combined diameters should notexceed the maximum.The terminals are suitable for both solid and stranded wires.FusesThe AC supply to the drive must be installed with suitable protection against overloadand short-circuits. The following section shows recommended fuse ratings. Failure toobserve this requirement will cause risk of fire.WARNINGModelNo ofinputphasesTypical inputcurrentAMaximumcontinuousinput currentAFuse rating Cable sizeIECclassgGClassCCInput Outputmm 2 AWG mm 2 AWGDST1201 1 4.0 6 10 0.75 16 0.75 24DST1202 1 7.6 10 10 1 16 0.75 22DST1203 1 9.0 16 15 2.5 14 0.75 20DST1204 1 13.4 16 20 2.5 12 0.75 18DST1201 3 3.1 3.5 6 10 0.75 16 0.75 24DST1202 3 6.4 7.3 10 10 1 16 0.75 22DST1203 3 8.6 9.4 16 15 2.5 14 0.75 20DST1204 3 11.8 13.4 16 20 2.5 12 0.75 18DST1401 3 2.6 2.8 4 10 0.75 16 0.75 24DST1402 3 4.2 4.3 6 10 0.75 16 0.75 24DST1403 3 5.9 6.0 8 10 0.75 16 0.75 22DST1404 3 7.9 8.0 10 10 1 16 0.75 20DST1405 3 9.9 9.9 12 15 1.5 14 0.75 18Control cable ≥0.5 20