RZW02.1-110-025 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-110-025 is part of the RZW Braking Resistors series and features a power rating of 110 kW with a resistance of 2.6 Ohms. This resistor supports a conductor cross-section of 70 mm² and is rated IP20 for protection. It has physical dimensions of 960 mm height, 595 mm width, 490 mm depth, and weighs 74 kilograms.
Internal Product Review
The RZW02.1-110-025 is a Bosch Rexroth Indramat RZW braking resistor with 110 kW power data and 2.6 Ω resistance, giving the assembly an excellent braking profile for high-demand drive systems. A 120 s load cycle and 25% SD operating factor support consistent thermal performance in cyclic duty. IP20 protection makes the unit a solid choice for enclosed industrial installations.
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Product Description:
The RZW02.1-110-025 braking resistor is manufactured by Bosch Rexroth Indramat as part of the RZW Braking Resistors series. It converts excess regenerative energy into heat, protecting connected inverters from DC-link overvoltage during rapid deceleration or load reversals. This function allows the drive to control braking energy that cannot be returned immediately to the power supply. The unit has design code 1 and belongs to line 2, making it suitable for compatible high-power drive systems. Its enclosure and electrical connections support installation as an external braking component near the associated inverter.
This resistor can absorb up to 110 kW of braking power within its permitted duty cycle. Its resistance of 2.6 Ω controls the current that flows when the unit is connected across a 600 V DC bus, while the minimum connectable resistance of 2.5 Ω keeps current within the drive limits. The load cycle lasts 120 seconds and includes a maximum on-time of 30 s, followed by a maximum off-time of 90 seconds to limit heat accumulation. An operating factor of 25% SD permits the resistor to remain energized for one-quarter of each complete cycle. The thermal time constant is 100 s, indicating how quickly the resistor responds to heating and cooling during repeated braking events. These operating limits must be observed when the connected machine performs frequent acceleration and deceleration cycles.
The power leads accommodate a conductor cross-section of 70 mm², providing capacity for the high braking currents handled by the resistor. An M10 mounting thread anchors the housing securely to its supporting structure. The aluminum enclosure has a protection rating of IP20, so the resistor must be installed inside a suitable cabinet and protected from water exposure. Its physical dimensions are 595 mm wide, 490 mm deep, and 960 mm high, requiring adequate cabinet space and ventilation clearance. The unit has a mass of 74 kg, so the mounting surface and handling equipment must support its weight. The enclosure must also be positioned where generated heat can dissipate without exposing nearby components to excessive temperatures.
