RKL4475 by Bosch Rexroth Indramat

The RKL4475 is a motor power cable manufactured by Bosch Rexroth Indramat within the RKL Motor Power Cables series. Designed for permanent routing between an Indramat servo drive and its synchronous motor, the cable transmits three-phase power and auxiliary control lines while withstanding the dynamic motion of cable chains in automated machinery. Its orange jacket helps with identification in crowded control cabinets and along machine cable runs. The cable is suited for packaging lines, handling systems, and transfer stations where power and auxiliary conductors need to travel together in one assembly.

Its conductor set is arranged as 4x16.0 mm² + 2x(2x1.5 mm²), providing three high-current phases, a protective earth core, and paired signal cores for temperature or brake circuits. The overall diameter measures 25.5 mm, which is useful when selecting compatible glands and chain compartments. A sheath of PUR (adhesion-free, matte) resists cutting oils and maintains flexibility at low temperatures, so the cable can move repeatedly without surface cracking. During continuous motion, the flexible minimum bend radius is 7.5 x D, which helps prevent conductor fatigue when the cable moves through energy tracks. In highly dynamic axes, the cable withstands accelerations up to 10 m/s², allowing rapid start-stop profiles without damage to the insulation system.

Electrical characteristics match industrial drive requirements. The power cores are rated for up to 300/500 V, while the integrated control pairs operate at 300/300 V. Low mutual capacitance of 1.2 nF/m limits reactive current at high switching frequencies and helps the inverter maintain clean voltage edges. A conductor loop resistance of 1.21 ?/km minimizes copper loss so voltage drop remains low over typical machine lengths. For fixed installation, the bend limit is 5 x D, which suits stationary machine sections where the cable is formed once and then left in place.