RZW Braking Resistors

RZW Braking Resistors are Bosch Rexroth external braking components used with RD500 frequency converters to dissipate regenerated energy during motor deceleration. The series includes standard resistor units for RD500 converters up to the 110 kW class, as well as augmented RZW02.1 and RZW03.1 versions for larger systems up to the 400 kW class where braking demand is higher. These resistors absorb energy from loads with long stopping times, high inertia, or repeated braking cycles, while the converter monitors thermal load and can shut down the system if the resistor’s permissible limit is exceeded. Construction varies across the range, from enclosed heavy-duty resistor elements to larger ventilated assemblies, with enclosure options including standard designs, augmented IP20 versions, and augmented IP23 versions. This allows the braking resistor to be matched to the RD500 converter size, regenerative energy level, and installation environment.