RZW02.1-055-015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-055-015 is part of the RZW Braking Resistors series and has a power rating of 55 kW with a resistance of 5.5 ohms. It features IP20 protection, measures 800 mm in depth, 490 mm in width, and 270 mm in height, and weighs 33 kilograms. The resistor handles a maximum housing temperature of 80 °C and operates on a 120 second load cycle basis.
Internal Product Review
The RZW02.1-055-015 is a Bosch Rexroth Indramat RZW braking resistor rated for 55 kW. A 5.5 Ω resistance and IP20 protection suit controlled braking circuits and clean cabinet installations. A 15% operating factor with 18 s maximum on-time makes the unit a strong choice for dependable intermittent-duty energy dissipation.
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Product Description:
The RZW02.1-055-015 braking module is built by Bosch Rexroth Indramat for the RZW Braking Resistors series. As a power-dissipating component, it pairs with drive controllers to absorb surplus DC-bus energy released during motor deceleration, preventing overvoltage. It is installed in control cabinets or near machinery where dynamic stopping is required during cyclic industrial motion.
The resistor has a continuous absorption capability of 55 kW, which is the maximum thermal load the housing can convert into heat over the applicable duty cycle. Its nominal resistance of 5.5 Ω matches drive modules that require a braking element at or above the specified 5 Ω minimum, ensuring predictable current peaks. With a short-duration operating factor of 15% SD on a 120-second load cycle, the element may conduct for 18 seconds and then remain idle for up to 102 seconds, limiting the average temperature rise. The enclosure has a protection rating of IP20, so it prevents finger contact with internal components but requires installation in a ventilated cabinet. Heat storage is characterized by a thermal time constant of 100 s, while the maximum housing surface temperature of 80 °C guides spacing from adjacent components. Connection lugs accept copper conductors up to 35 mm². The resistor belongs to line 2 and design 1 within the product series.
The unit has a depth of 800 mm, a width of 490 mm, and a height of 270 mm. The assembly weighs 33 kg, allowing it to be supported on standard DIN shelf brackets without additional reinforcement. The casing tolerates the specified duty cycle because its steel profile and internal ceramic elements distribute heat evenly before the cooling interval begins. Its mounting holes follow the RZW layout, allowing the module to be secured directly to cabinet frames without additional adapters.
