RKL4453 by Bosch Rexroth Indramat

The RKL4453 motor power cable from Bosch Rexroth Indramat belongs to the RKL Motor Power Cables series. This cable carries three-phase power and auxiliary control signals between drive controllers and synchronous motors in automated handling lines, packaging machines, and other motion axes. Its construction is suited for dynamic cable-track operation, helping maintain stable power and signal transmission during continuous machine cycles. The cable also supports applications where compact routing and repeated axis travel place both electrical and mechanical demands on the assembly.

The cable is rated for 5,000,000 drag-chain bending cycles, so it can operate through long production shifts without premature fatigue. In fixed installations, the minimum bend radius is 5 x D, whereas moving applications require 7.5 x D; these limits help protect the conductors from compression and tensile stress. The overall jacket diameter is 18.5 mm, which provides a reference dimension for gland sizing and cabinet feedthroughs. Electrical capacitance is 0.8 nF/m, which affects reactive current as cable length increases. Drag-chain compatibility is confirmed, and the assembly includes two control pairs, 2 x 1.0 mm² and 2 x 1.5 mm², for brake release or temperature sensor signals alongside the power cores.

Line losses are kept low with a conductor resistance of 3.30 ?/km, supporting accurate motor current delivery on extended cable runs. The four power conductors use a 4 x 6.0 mm² layout, allowing continuous current levels suited to medium-frame servo motors. Visual identification in cable trays is simplified by the Orange (RAL 2003) jacket, and the sheath uses PUR (adhesion-free, matte) to resist cutting oils while sliding smoothly in guide channels. For thermal endurance, the insulation remains stable up to 90 °C in fixed routing and 80 °C during flexing. This helps maintain dielectric separation and mechanical flexibility during normal machine operation.