RZW02.1-090-006 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-090-006 is part of the RZW Braking Resistors series and has a rated power of 90 kW with a resistance of 3.1 Ohms. This unit features IP20 protection, weighs 22 kg, and measures 490 mm wide by 270 mm high by 600 mm deep. Its maximum surface temperature is 80°C and it supports a load cycle of 120 seconds, with a maximum on-time of 7.2 seconds and off-time of 112.8 seconds.
Internal Product Review
The RZW02.1-090-006 is a Bosch Rexroth Indramat RZW braking resistor with 90 kW power data and 3.1 Ω resistance. IP20 protection and an 80 °C maximum surface temperature support dependable integration in controlled industrial panels. A well-engineered choice for dynamic braking duty, highlighted by a 120 s load cycle.
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Product Description:
The RZW02.1-090-006 is a braking resistor manufactured by Bosch Rexroth Indramat for the RZW Braking Resistors series. Installed on the DC link of a drive controller, the unit converts regenerative electrical energy into heat during rapid stops and reversals in automated machinery. This dissipation prevents excessive DC-link voltage from damaging connected inverters or motors. The resistor is intended for drive systems that must manage substantial amounts of returned energy without interrupting controlled deceleration.
The resistor has a continuous power rating of 90 kW, allowing it to handle large braking loads within its permitted duty cycle. Its nominal resistance of 3.1 Ω determines the current that flows when the drive diverts excess voltage to the module. Energy handling follows a 120-second load profile, with a permitted activation period of 7.2 s and a required recovery period of 112.8 seconds. This operating pattern corresponds to a 6% SD duty factor. The external casing can reach 80 °C, so adequate clearance must be maintained between the resistor and heat-sensitive components. The minimum connectable resistance is 2.5 Ω, which keeps braking current within the limits of the drive’s power semiconductors.
The resistor has a thermal time constant of 100 s, allowing its temperature response to be evaluated during repeated braking pulses. Its housing has an IP20 protection rating, which prevents finger contact with hazardous internal parts and blocks larger solid objects. Incoming conductors with cross-sectional areas of up to 50 mm² connect to spring terminals that accommodate the high currents produced during braking. The unit weighs 22 kg, allowing it to be mounted on a suitably rated cabinet panel without unusually heavy support structures. The housing measures 270 mm in height, 490 mm in width, and 600 mm in depth, so the installation must provide sufficient panel area and ventilation clearance. The unit has mechanical design code 1 and belongs to line 2 of the product series.
