RZW02.1-018-060 Bosch Rexroth Indramat
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MPN: R911203055
The Bosch Rexroth Indramat RZW02.1-018-060 is part of the RZW Braking Resistors series and has a peak power of 16.5 kW with a general power rating of 18.5 kW. This resistor features a resistance of 13 ohms, an operating factor of 60 percent SD, and comes in an IP20 protection class. It has dimensions of 800 mm depth, 490 mm width, and 270 mm height, with a weight of 33 kilograms.
Internal Product Review
The RZW02.1-018-060 is a Bosch Rexroth Indramat RZW braking resistor built for dependable dynamic braking, with 18.5 kW power data and 13 Ω resistance. IP20 protection and a 60% operating factor support stable integration in controlled industrial panels. Peak handling of 16.5 kW makes this unit a strong choice for repeat braking duty.
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Product Description:
The RZW02.1-018-060 braking resistor is manufactured by Bosch Rexroth Indramat and belongs to the RZW Braking Resistors series. As a B4-type module, it is intended for cabinet installation, where it dissipates regenerative energy returned to the DC link whenever an inverter-driven motor slows down. The assembly follows Design 1 on Line 2 and has an IP20 housing that guards against accidental contact while relying on cabinet airflow for cooling. Its physical dimensions are 490 mm wide, 270 mm high, and 800 mm deep, establishing the cabinet space required beside drives and contactors.
The resistor element has a nominal resistance of 13 Ω for energy-rich braking pulses. The drive family lists a minimum connectable resistance of 13.3 Ω, so compatibility must be verified before the resistor is connected. During short deceleration events, the unit can absorb 16.5 kW, while its continuous capability is rated at 18.5 kW when the required airflow and mounting guidelines are observed. An operating factor of 60% SD indicates the permitted duty cycle, and the unit may remain energized for up to 72 seconds within that operating window before a cooling pause is required. The thermal time constant is 100 seconds, indicating how quickly the internal temperature responds to load changes. A 120-second load cycle provides the basis for sizing repetitive braking events in machine sequences.
The required cooling pause after each energized period is 48 seconds, allowing the resistor core to return to a safe operating temperature before the next cycle. Power terminals accept conductors up to 16 mm², which helps limit cable heating during high-current peaks. Adequate rail space and airflow clearance must be maintained around the housing to prevent heat from accumulating near adjacent inverters. With a mass of 33 kg, the resistor requires secure mounting points that can support its weight during operation. Its mass also provides thermal inertia, which slows temperature changes as the braking load varies throughout the operating cycle.
