RZW03.1-132-025 Bosch Rexroth Indramat
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MPN: R911200431
The Bosch Rexroth Indramat RZW03.1-132-025, part of the RZW Braking Resistors series, has a rated power of 132 kW and a resistance value of 2.4 Ohm. This resistor measures 995 mm in width, 770 mm in height, and 490 mm in depth, and has an IP23 protection class. It features a load cycle of 120 seconds, a 25 percent operating factor, and weighs 101 kilograms.
Internal Product Review
The RZW03.1-132-025 is a Bosch Rexroth Indramat RZW braking resistor with 132 kW power data and 2.4 Ω resistance. IP23 protection and a 25% operating factor support dependable braking duty in demanding drive systems. A strong choice for controlled energy dissipation in industrial motion applications.
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Product Description:
The RZW03.1-132-025 braking resistor is manufactured by Bosch Rexroth Indramat. It is part of the RZW Braking Resistors series and is designed for use with industrial drive systems. In an automation cell, it connects to the DC bus of an inverter and converts excess kinetic energy into heat whenever a servo axis or spindle decelerates. This process prevents overvoltage trips and protects sensitive power electronics from regenerated energy that would otherwise raise the DC-bus voltage.
This model handles up to 132 kW of instantaneous thermal load, indicating how much regenerated power it can safely absorb during a braking event. Its nominal resistance is 2.4 Ω, while multiple units may be connected in parallel to reach the minimum resistance of 2.2 Ω required for a particular energy profile. The resistor is intended for cyclical duty and has an operating factor of 25% SD, allowing the element to cool between periods of full load. Copper conductors with cross-sectional areas of up to 70 mm² can be connected to the M10 terminals, minimizing resistive losses between the drive and the resistor. A weather-shielded housing rated at IP23 blocks direct spray and falling debris while permitting the ventilation needed to dissipate heat. This enclosure allows installation in ventilated electrical rooms without requiring a separate protective cabinet.
The permitted energization period is 30 s, followed by a 90-second rest period that allows the resistor grids to release accumulated heat. The assembly reaches thermal equilibrium in 100 s, producing a predictable temperature rise during successive operating cycles. It has a vertical dimension of 770 mm, a width of 995 mm, and a depth of 490 mm, allowing placement beside standard control cabinets. Its mass of 101 kg requires secure mounting on a rigid floor or supporting frame. The Design 1 enclosure places stainless steel grids behind perforated side panels to promote uniform airflow across the resistive elements. An open-bottom layout further supports passive cooling during each off-time interval without requiring an integrated fan.
