RZW03.1-004-025

The Bosch Rexroth Indramat RZW03.1-004-025 belongs to the RZW Braking Resistors series and is housed in a robust galvanized steel plate housing. This braking resistor delivers a peak power of 3.5 kW (SD 6%) and features a steady-state resistance of 47 Ω, making it ideal for regenerative braking applications in industrial automation. Designed to absorb and dissipate kinetic energy during motor deceleration, it protects drives and mechanical components from overvoltage and thermal stress.

Featuring a thermal time constant of 100 s and a protection rating of IP23, the RZW03.1-004-025 ensures consistent performance under repeated braking cycles. The unit is classified under Power Class 004 and accommodates switch-on durations of 6%, 15%, and 25% relative to a 120-second load cycle. It employs a built-in 3-phase, 400 V, 50 Hz axial ventilator for efficient heat dissipation, supported by an air current monitoring system with wind vane relay to detect airflow interruptions. Conductor cross-sections of 2.5 mm² for both SD 6% and SD 25% cycles guarantee reliable current-carrying capacity and minimal voltage drop under load.

In addition to its core specifications, this resistor’s galvanized steel construction enhances corrosion resistance and mechanical durability, ensuring long service life in demanding environments. The IP23 rating confirms protection against solid objects and water spray, meeting industrial safety standards. With a minimum connectable resistance of 30 W, it maintains thermal stability at low dissipation levels, preventing overheating during intermittent operation. By integrating advanced ventilation and monitoring features, the RZW03.1-004-025 offers high efficiency, reliability, and precise braking control. Its application in industrial automation systems yields improved energy management, reduced maintenance downtime, and enhanced overall system protection.