RKL4553 by Bosch Rexroth Indramat

The RKL4553 motor power cable is produced by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series. As a pre-assembled feed line between servo drives and synchronous motors, it delivers three-phase power and auxiliary control signals in a single jacket, simplifying installation in automated machinery. Within an automation cell, the cable carries drive output current, low-level control wiring, and protective grounding so that motion axes can be energized and monitored without separate harnesses. This arrangement helps keep cable runs organized where moving axes need both motor power and supporting signals routed through the same path.

In dynamic routing systems, this cable supports 5,000,000 bending cycles, showing that it is intended for repeated motion inside an energy chain. The conductor set uses a 4x4.0+(2x1.0)+(2x1.5) mm² layout, with larger cores for motor power and smaller pairs for auxiliary functions. The power conductors are rated for 500 V, while the paired control wires carry up to 300 V, helping separate motor supply from lower-voltage circuits. With an outer diameter of 17.0 mm, the assembly fits standard chain separators, and its drag-chain approval supports continuous linear travel without compromising shielding or insulation. The orange jacket also makes the cable easier to identify quickly among other machine wiring.

For moving installations, the cable uses a minimum bend radius of 7.5 x D, while fixed routing can use a tighter bend where motion is absent. The outer sheath is made of PUR, which provides good resistance to abrasion from carrier links and exposure to coolants in industrial equipment. Continuous conductor temperature can reach +90 °C without harming the insulation system, supporting use in warm enclosures and near heavily loaded drive components. Electrical resistance of the 4.0 mm² conductors is limited to 4.95 ?/km, which helps reduce voltage drop over distance and supports stable motor performance during operation.