RZW02.1-110-015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-110-015 is part of the RZW Braking Resistors series and has a power rating of 110 kW with a resistance of 2.8 Ohms. This unit measures 795 mm wide, 710 mm high, and 490 mm deep, and it weighs 80 kilograms. It offers an IP20 protection class and operates with a thermal time constant of 100 seconds at 15% operating factor.
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Product Description:
The RZW02.1-110-015 is a panel-mounted braking resistor produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. In multi-axis drive systems, the unit converts excess kinetic energy from decelerating motors into heat, preventing DC-bus overvoltage and protecting inverters. Its C3 housing measures 795 mm × 490 mm × 710 mm, allowing cabinet installation next to power electronics without active cooling accessories. The Design 1 model belongs to Line 2 of the platform and provides a standardized footprint for medium-to-high-power applications.
During braking cycles, the resistor can absorb up to 110 kW of electrical power, indicating the instantaneous thermal load it can handle. The fixed resistance of 2.8 Ω sets the current drawn from the DC link; a lower resistance would raise current and heating, while this value balances energy dissipation with electrical stress on the drive. The maximum energized period is 18 s, after which the element must cool for 102 s. An operating factor of 15% SD keeps the metal grid within its allowable temperature range during repetitive stopping sequences. A conductor cross-section of 70 mm² carries the associated current and supports a secure connection to the braking circuit.
The thermal profile has a 4:1 peak-to-continuous power ratio, allowing the resistor to absorb short energy spikes while keeping its average thermal load controlled. A protection rating of IP20 prevents accidental finger contact with hazardous internal parts while maintaining natural airflow through the fins. Heat storage is characterized by a 100 s thermal time constant, so the temperature rises gradually during operation and can be monitored by the drive controller. At 80 kg, the assembly requires a cabinet frame capable of supporting its weight securely. Its substantial mass also helps spread heat throughout the assembly and reduces the likelihood of localized hot spots during repeated braking cycles.
