RZW03.1-015-040

The RZW03.1-015-040 is a high-performance braking resistor manufactured by Bosch Rexroth Indramat as part of the RZW Braking Resistors series. Engineered for demanding industrial automation, this unit delivers a continuous Power Rating of 15 kW and a Resistance of 18 Ω at a 40% Operating Factor (sd). Housed within robust Galvanized Steel Housing and rated at IP 23, the resistor weighs approximately 15 kg and operates safely up to a Surface Temperature of 80 °C. Designed for use in high-inertia motor systems, the RZW03.1-015-040 converts regenerative energy into heat to protect power electronics and DC bus lines.

Its technical capabilities include a Peak Power handling of 13.5 kW and a Thermal Time Constant (tbw) of 100 s, ensuring rapid energy dissipation during deceleration cycles. The resistor supports a Cross-section of 10 mm², optimizing current flow and minimizing voltage drop as dictated by Ohm’s law. A Min. Connectable Resistance of 17.5 Ω provides design flexibility, while the specified Resistance of 18 Ω (for SD 40%) guarantees consistent performance at the rated duty cycle. The combination of Power Rating, Peak Power, and duty cycle management enables precise thermal control under transient loads and prevents overheating.

Operational features emphasize reliability in regulated environments. The device must be installed where ambient humidity does not exceed 90% RH (noncondensing), and within an Operating Temperature Range of 0 to 40 °C. Ventilation requirements dictate that the Air supply must not contain aggressive or conducting gases to preserve insulation integrity. Its IP 23 protection class offers limited dust ingress prevention and safeguards against water sprays up to 60° from vertical, suitable for most factory floors. The galvanized steel enclosure provides mechanical stiffness, corrosion resistance, and dimensional stability during thermal cycling and vibration.

Integration of the RZW03.1-015-040 into drive systems is straightforward due to its standardized mounting footprint and simple connection scheme. At ~15 kg, its thermal mass buffers energy spikes and facilitates solid mechanical coupling to panel structures. This resistor is ideal for applications in cranes, hoists, winding machines, printing presses, and conveyor systems where controlled deceleration and energy management are critical. By pairing seamlessly with Bosch Rexroth Indramat drive controllers, it enhances system uptime, reduces wiring complexity, and delivers consistent braking performance across varied industrial automation platforms.