RZW02.1-005-015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-005-015 is a braking resistor from the RZW Braking Resistors series with a power rating of 5.5 kW and a resistance of 47 Ohms. This unit features an IP20 protection class, weighs 3.4 kg, and has dimensions of 686 mm in width, 120 mm in height, and 92 mm in depth. It offers a load cycle of 120 seconds and a maximum on time of 18 seconds.
Internal Product Review
The RZW02.1-005-015 is a Bosch Rexroth Indramat RZW braking resistor with 5.5 kW power data and 47 Ω resistance. IP20 protection and a 120 s load cycle support dependable braking energy management in controlled industrial panels. A 15% operating factor makes the unit a strong choice for intermittent duty applications.
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Product Description:
The RZW02.1-005-015 is a braking resistor assembled by Bosch Rexroth Indramat for the RZW Braking Resistors series. Within an AC drive system, the unit converts regenerative motor energy into heat, preventing excessive DC-bus voltage during deceleration or operation with overhauling loads. This function protects the inverter and connected motor while supporting rapid braking cycles in automated handling, packaging, and positioning equipment.
The resistor element has a nominal resistance of 47 Ω, allowing the drive to discharge current without exceeding the voltage setpoint of its intermediate circuit. During a single duty period, it can absorb up to 5.5 kW of power, provided that the conduction interval does not exceed 18 s. This interval corresponds to an operating factor of 15% SD within a fixed load cycle of 120 seconds. After each active phase, the resistor requires a 102-second cooling interval before the next identical load cycle. The steel housing has a protection class of IP20, which helps prevent accidental contact with internal components while permitting airflow across the cooling surfaces. A depth of 92 mm and height of 120 mm allow the module to fit on a shared backplate with other RZW line 2, design 1 components.
Thermal response is characterized by a time constant of 300 s, meaning the heat sink approaches 63% of its final temperature five minutes after a step load. This response moderates cabinet temperature changes during repetitive braking cycles and allows heat to dissipate between active periods. The assembly weighs 3.4 kg, limiting the added load on vertical mounting panels despite its width of 686 mm. When composite resistor networks are used, a minimum external resistance of 30 Ω must be maintained to prevent overcurrent faults. Proper spacing around the enclosure is necessary to preserve natural airflow and keep nearby components from being exposed to concentrated heat. The resistor should be mounted where its generated heat can leave the cabinet without obstructing wiring or adjacent drive modules.
