RZW02.1-030-060 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-030-060 is part of the RZW Braking Resistors series and has a power rating of 30 kW with a resistance of 11 ohms. The resistor measures 1000 mm in depth, 490 mm in width, and 270 mm in height, weighing 44 kg. It features an IP20 protection class and supports a maximum ambient temperature of 40 °C with a load cycle of 120 seconds.
Internal Product Review
The RZW02.1-030-060 is a Bosch Rexroth Indramat RZW braking resistor rated for 30 kW with 11 Ω resistance. IP20 protection and a 60% operating factor support dependable braking duty in controlled cabinet installations. A 120 s load cycle makes this unit a strong fit for consistent energy dissipation.
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Product Description:
The RZW02.1-030-060 is a braking resistor manufactured by Bosch Rexroth Indramat for the RZW Braking Resistors series. Installed on the DC bus of a servo inverter, it converts regenerative electrical energy produced during rapid motor deceleration into heat so that the intermediate-circuit voltage remains within acceptable limits. This function protects the drive electronics from excessive voltage and supports controlled braking in conveyors, presses, and other automated equipment with frequent overhauling loads. The resistor is intended for installation as part of a compatible drive system rather than as a stand-alone braking device.
The resistor can absorb up to 30 kW of electrical power, making it suitable for medium-power, multi-axis systems. Its base resistance of 11 Ω controls the current drawn during each braking event and affects the rate at which regenerated energy is dissipated. The IP20 protection rating helps prevent accidental contact with live components, but the unit must be installed in a dry control cabinet. A thermal time constant of 100 s provides a predictable increase and decrease in element temperature during repeated braking cycles. The unit has a mass of 44 kg, so its mounting surface must be capable of supporting the load securely. Adequate clearance around the enclosure is also necessary to allow heat to escape without exposing nearby components to excessive temperatures.
Cyclic operation permits a duty cycle of 60% SD during each 120-second load period. Under this duty cycle, the resistor may remain energized for up to 72 s before requiring a cooling interval of at least 48 s. The enclosure has a depth of 1000 mm, a width of 490 mm, and a height of 270 mm, providing a large surface area for heat dissipation. Its terminals accept 25 mm² line conductors and a 10 mm² protective grounding conductor, supporting low-impedance electrical connections. The resistor can operate at ambient temperatures up to 40 °C. Its surface temperature is limited to 80 °C, so nearby wiring and cabinet components must be positioned with suitable thermal clearance.
