RZW02.1-132-015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-132-015 is part of the RZW Braking Resistors series and features a power rating of 132 kW. This resistor has a resistance of 2.7 ohms, an IP20 protection class, and measures 795 mm wide by 710 mm high by 490 mm deep. It weighs 80 kg and has a line cross-section of 70 mm².
Internal Product Review
The RZW02.1-132-015 is a Bosch Rexroth Indramat RZW braking resistor rated for 132 kW with 2.7 Ω resistance. IP20 protection and a 15% operating factor make this unit a well-balanced choice for controlled braking performance in demanding drive systems.
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Product Description:
The RZW02.1-132-015 braking resistor is produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. This external resistor module is connected to the DC bus of Rexroth inverters so regenerated energy is safely dissipated as heat instead of returning to the mains. By removing braking losses from the converter, the unit supports rapid motor deceleration and repeated stop-and-start cycles in indexing tables, gantry axes, and press drives. Its external design also prevents the converter housing from absorbing all of the heat produced during dynamic braking.
The resistor’s maximum absorption capability reaches 132 kW, indicating the peak braking power that can be converted into heat during each braking event. Its fixed resistance of 2.7 Ω sets the peak current that flows at the rated bus voltage and affects the thermal load placed on the steel grid elements. The module may conduct for up to 18 s before a cooling pause is required. An off interval of 102 s then allows the resistor bank to return to a safe operating temperature. These duty periods result in an operating factor of 15% SD, which is suitable for applications that brake hard but infrequently. A minimum external resistance of 2.2 Ω applies to parallel wiring, ensuring that the drive does not experience a current surge beyond the chopper’s limit.
An enclosure rating of IP20 permits cabinet mounting in controlled indoor locations while shielding users from accidental contact with live parts. The resistor has a thermal time constant of 100 s, so its temperature rises gradually and can be monitored by the drive control system. The resistor body weighs 80 kg, requiring a mounting surface capable of supporting its mass during operation. Its frame measures 795 mm in width, 710 mm in height, and 490 mm in depth, allowing placement on a suitably sized control-panel backplate. Heavy M10 stud terminals provide secure electrical connections for the braking circuit. A 70 mm² conductor cross section accommodates the high currents encountered during dynamic braking without excessive cable heating.
