RZW03.1-007-025

The Bosch Rexroth Indramat RZW03.1-007-025 is a member of the RZW Braking Resistors series designed to provide reliable energy dissipation during dynamic braking in industrial automation systems. This resistor features a power class of 7.5 kW and a minimum resistance value of 30 Ω, enabling precise absorption of regenerative energy. Constructed with a fixed resistor in galvanized steel housing, it ensures mechanical strength and corrosion resistance under demanding operational conditions. Its primary application is to protect servo drives by converting excess kinetic energy into heat, thereby stabilizing DC bus voltage during rapid deceleration.

This braking resistor employs a Fixed Resistor Type F design with a thermal time constant of 100 seconds, optimizing braking performance in high-frequency stop-start cycles. An operating factor of 25% and a maximum switch-on time of 30 seconds safeguard the resistor from thermal overload by limiting continuous energy dissipation. The electrical connection is facilitated by a 2.5 mm² cross section cable interface, ensuring secure current flow and minimal contact resistance. The enclosure protection rating of IP23 provides defense against solid ingress larger than 12.5 mm and angled water spray, making it suitable for moderately harsh environments.

Additional features include an operating ambient temperature range of 0 to 40 °C and a storage temperature span from -25 to +70 °C, allowing versatile deployment in varied climate conditions. The resistor tolerates up to 90% relative humidity (non-condensing) and must be mounted with proper air ventilation to maintain optimal thermal management. Weighing just 2.6 kg, the compact unit is easy to install and integrate into existing cabinets. By adhering to industrial protection standards and offering consistent braking performance, the RZW03.1-007-025 enhances system reliability and prolongs the service life of drive components in high-performance automation applications.