RKL4782 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4782 is a power cable from the RKL Motor Power Cables series. It features a power wire cross-section of 50.0 mm², control wire cross-section of 2.5 mm², and an outer diameter of 36.8 mm. The cable uses a halogen-free PUR jacket in orange, and is rated for power voltages up to 300/500 V and 600 V AC under UL standards.
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Product Description:
The RKL4782 is a motor power cable produced by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It delivers three-phase energy and control signals from a cabinet-mounted drive to an Indramat servo motor, supporting fixed routing in machine tools and material-handling cells where continuous drag-chain motion is not required. The power conductors have a cross-sectional area of 50.0 mm², providing a low-impedance path for high drive currents, while the separate control pair has a cross-sectional area of 2.5 mm² for brake-release or temperature-sensor signals.
The cable has an overall diameter of 36.8 mm, which determines the required gland plate cutouts and strain-relief hardware. Copper resistance at 20 °C is limited to 0.386 Ω/km, minimizing resistive power losses over long cable runs. For line-to-ground safety, the European voltage rating of 300/500 V applies to fixed installations, and the same conductors are approved for 600 V AC service under UL. This dual approval allows the cable to meet the applicable voltage requirements of machines intended for different regions without changing the conductor arrangement.
The cable capacitance is 1.3 nF/m, which the drive must account for when managing motor-side voltage changes and maintaining stable current control. The fixed-routing temperature limit of +90 °C permits installation in enclosures that dissipate substantial inverter heat, while a lower limit of +80 °C applies during flexible handling. The matte PUR jacket is orange (RAL 2003), resists oils and cutting fluids, and moves through crowded cable trays without snagging easily. Its halogen-free formulation minimizes the release of corrosive gases during a fire and supports plant safety requirements. A GNYE protective conductor provides a standardized grounding connection. The cable is not suitable for continuous torsional or bending stress, so it should be used in static or lightly articulated routing.
