RZW02.1-022-025 Bosch Rexroth Indramat
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MPN: R911200392
The Bosch Rexroth Indramat RZW02.1-022-025 is part of the RZW Braking Resistors series and has a power rating of 22 kW with a resistance of 14 Ohms. This braking resistor features IP20 protection, a maximum surface temperature of 80 degrees Celsius, and weighs 22 kilograms. Its dimensions are 600 mm in depth, 490 mm in width, and 270 mm in height.
Internal Product Review
The RZW02.1-022-025 is a Bosch Rexroth Indramat RZW braking resistor rated for 22 kW with 14 Ω resistance. IP20 protection and an 80 °C maximum surface temperature support dependable integration in controlled electrical enclosures. The 25% operating factor and 3.2 peak/continuous ratio make the unit a strong choice for repeatable braking energy dissipation.
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Product Description:
The RZW02.1-022-025 is a resistor unit produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. It dissipates regenerated energy from servo drives and stabilizes DC-link voltage in automated machinery. The enclosure measures 490 mm wide, 600 mm deep, and 270 mm high, allowing it to fit control cabinets designed for high-power energy dissipation. These dimensions must be considered when arranging nearby equipment and the clearances needed for ventilation.
With a continuous power dissipation capability of 22 kW, the RZW02.1-022-025 can absorb braking energy from medium-sized multi-axis groups. The element has a nominal resistance of 14 Ω, while drives with chopper transistors can be connected to resistances as low as 11.6 Ω without exceeding current limits. During a 120 s load cycle, the resistor may conduct for a maximum of 30 s, resulting in an operating factor of 25% SD. A peak-to-continuous energy ratio of 3.2 permits short surges above the average thermal load. The 100 s thermal time constant indicates how quickly the surface temperature approaches a steady state after the unit is energized. The mechanical arrangement is Design 1, Line 2, which maintains the applicable connector positions and mounting-hole pattern for the RZW platform.
The enclosure meets IP20 ingress protection, helping prevent accidental finger contact with hazardous internal parts when the assembly is mounted inside a ventilated control panel. During braking sequences, the fins may reach a surface temperature of 80 °C, so the surrounding layout should provide adequate clearance for natural convective airflow. A mandatory idle period of 90 s follows each energized interval to provide time for cooling. The steel frame and ceramic elements weigh 22 kg, providing thermal inertia for short, high-energy braking events while maintaining electrical insulation. The resistor should be positioned so that rising warm air can leave the enclosure without being obstructed by adjacent components.
