RZW03.1-075-040

The Bosch Rexroth Indramat RZW03.1-075-040 is a high-performance braking resistor in the RZW Braking Resistors series, designed specifically for industrial automation applications that demand reliable dynamic braking. This resistor delivers a 75 kW power class rating at a 40% short-duty cycle, ensuring robust energy dissipation in repetitive braking scenarios. Constructed with a galvanized steel housing, the unit provides mechanical durability and structural integrity under industrial conditions. The RZW03.1-075-040 features a compact footprint while maintaining high thermal stability, making it an optimal choice for motor drive cabinets and power conversion systems. Engineers will appreciate the straightforward mounting and minimal maintenance requirements inherent in its design.

Technical specifications are carefully balanced to support rigorous performance criteria. The resistor exhibits a thermal time constant of 100 s, enabling predictable temperature rise under sustained load. Its resistance is precisely set to 5 Ω at 40% SD and 5.4 Ω at 60% SD, matched to conductor cross-section values of 50 mm² at 40% SD and 50 mm² at 60% SD for consistent heat distribution. The device carries a Design Code 1 and a Type Key Line Value 3 classification, aligning with Bosch Rexroth Indramat’s quality standards. Weight varies by configuration type, allowing system designers to optimize cabinet load calculations.

Operational features prioritize environmental resilience and continuous performance in standard factory settings. The resistor operates reliably across an ambient operating temperature range of 0°C to 40°C and tolerates up to 90% non-condensing relative humidity without insulation degradation. An IP 23 protection class rating protects against dust ingress and vertical water sprays, making the unit suitable for partially sheltered installations. Its 40% SD operating factor supports frequent cycling, while the robust steel housing ensures minimal maintenance under vibration and shock. These attributes combine to deliver consistent braking energy management over extended service intervals.

System integration with servo drives, frequency converters, and motor controller assemblies is seamless, thanks to the RZW03.1-075-040’s standardized electrical interfaces and mounting provisions. The resistor’s power handling characteristics suit applications such as high-speed conveyor braking, repetitive indexing tables, and CNC machine tool deceleration. Control cabinet layouts benefit from the component’s narrow profile, galvanized finish, and predictable heat dissipation. Targeted for industrial automation environments, this braking resistor ensures precise, repeatable energy absorption in demanding dynamic braking tasks.