RZW02.1-022-060 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-022-060 is a braking resistor from the RZW Braking Resistors series, featuring a power capacity of 22 kW and a resistance of 13 Ohms. It measures 800 mm in depth, 490 mm in width, and 270 mm in height, with a weight of 33 kilograms. This model offers IP20 protection and an operating factor of 60%.
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Product Description:
The RZW02.1-022-060 braking resistor is produced by Bosch Rexroth Indramat within the RZW Braking Resistors series. It is designed for use with compatible Rexroth drive controllers in industrial automation systems. The module converts excess kinetic energy from decelerating motors into heat so the DC-bus voltage remains within safe operating limits during braking.
It handles a continuous power dissipation of 22 kW when operated within its specified duty cycle. The resistor element has a nominal resistance of 13 Ω, allowing predictable current flow from the drive while excess energy is dissipated. Because braking does not occur continuously, the unit has an operating factor of 60% SD. It can remain energized for 72 s and must then cool for 48 s before the next cycle. These operating and cooling intervals form a 120-second load cycle that keeps surface temperatures within the permitted range. Copper terminals sized for a 16 mm² power conductor receive the DC-link leads, while a separate 10 mm² grounding conductor connects the housing to the plant grounding grid.
The overall load cycle of 120 s corresponds to a thermal time constant of 100 s, allowing the resistor to absorb repeated braking pulses without exceeding its internal temperature limit. Drive selection must also account for the minimum connected resistance of 11.6 Ω, which prevents the active elements from being overstressed when multiple modules are wired in parallel. The IP20 enclosure protects against accidental contact with the resistor coil while allowing free convection cooling. The steel frame measures 490 mm wide, 270 mm high, and 800 mm deep, and it weighs 33 kg. An M10 mounting thread secures the frame to the installation surface. The Design 1, Line 2 configuration code identifies the internal winding arrangement used for the corresponding thermal performance curves.
