RKL4782 by Bosch Rexroth Indramat

The RKL4782 cable belongs to the RKL Motor Power Cables series manufactured by Bosch Rexroth Indramat. It is specified as a motor power cable for stationary routing, linking drive controllers to servomotors and their associated control components in automated equipment. Within an installation it spans rigid trays or conduits to the motor junction box, where minimal movement is expected, so mechanical endurance against cyclic flexing is not a primary design target.

This model has an outer diameter of 36.8 mm, created by a PUR jacket that is adhesion-free and matte to ease pulling through ducts. Its three power conductors each offer a cross-section of 50.0 mm², while a separate pair for control circuits is sized at 2.5 mm²; a GNYE protective conductor is included for safety bonding. Line-to-line capacitance is rated at 1.3 nF/m, and the copper cores present a DC resistance of 0.386 ?/km at 20 °C, parameters that influence drive sizing and allowable distance between cabinet and motor. Because the structure is not suited for bending or torsion stress, the cable must be laid in fixed installations only, preventing premature conductor fatigue in moving drag-chain applications.

The thermal envelope supports continuous conductor temperatures up to +90 °C in fixed routing and up to +80 °C where limited flexibility is required during installation. Power cores are approved for nominal operation at 300/500 V and they also meet a UL listing for up to 600 V AC; the control pair carries a separate 300/300 V rating with identical UL voltage clearance. Flame retardancy is enhanced because the cable is halogen-free, reducing corrosive gas release during a fire. Its orange jacket, in RAL 2003, provides quick visual identification on the factory floor, and the PUR sheath resists oils and coolants while remaining adhesion-free.