Product Description:

The RKL4539 motor power cable is produced by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series. It is intended to link servo drives to synchronous or asynchronous motors in automated machinery, providing three-phase power and protective earth conductors in one jacket. By matching the electrical and mechanical interfaces used throughout Rexroth drive systems, the cable enables quick installation between a cabinet-mounted inverter and a motor-side terminal box while maintaining noise immunity required for industrial automation environments.

Mechanical layout starts with the bulk cable type INK0667, which defines jacket material and shielding appropriate for drag-chain routes. The internal geometry follows the 4x35.0 + 2x(2x1.5) StC arrangement, combining four power cores and paired control conductors for temperature sensors or brakes. Each power core features a section of 35.0 mm², supporting high current delivery with limited voltage drop over long runs. Overall outer diameter is 30.8 mm, so gland and conduit sizing must account for this dimension when planning cabinet penetrations. Typical line-to-earth capacitance reaches 1.2 nF/m, a value that influences drive output filter selection to keep common-mode interference within limits.

The conductor loop resistance is 0.554 Ω/km, enabling accurate fault calculations for protective devices. Fixed routing can tolerate wire temperatures up to +90 °C, while dynamic cable chains are limited to +80 °C to preserve insulation life. A minimum static bend of 5 x D and a dynamic limit of 7.5 x D protect the stranded copper from fatigue. The cable attaches to motors through Terminal Box Size 4 clamps and mates with the drive via the INS0382/C35 connector, carrying three power cores plus PE and auxiliary 1.5 mm² sensor pairs.