RZW03.1-030-006 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW03.1-030-006 is part of the RZW Braking Resistors series and has a rated power of 30 kW with a resistance of 10 Ohms. This resistor has IP23 protection, a weight of 26 kilograms, and measures 520 mm in height, 395 mm in width, and 490 mm in depth. Its maximum surface temperature is 80 degrees Celsius and it supports a line cross-section of 6 mm².
Internal Product Review
The RZW03.1-030-006 is a Bosch Rexroth Indramat RZW braking resistor with 30 kW power data and 10 Ω resistance. IP23 protection and an 80 °C maximum surface temperature support dependable braking duty in industrial installations. A 100 s thermal time constant gives this unit a well-balanced thermal profile for consistent energy dissipation.
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Product Description:
The RZW03.1-030-006 is a braking resistor module produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. In regenerative servo or inverter systems, this unit converts surplus DC-bus energy into heat so that the connected drive controller can decelerate motors without overvoltage faults. Its construction and terminal layout let it mount close to the power section of an Indramat drive cabinet, providing the required discharge path whenever dynamic braking is commanded.
The resistor can absorb up to 30 kW of instantaneous braking power, but continuous operation is limited to an operating factor of 6% SD. A cold resistance of 10 Ω sets the initial current that flows during each discharge pulse, while a minimum connectable value of 8.75 Ω helps protect the drive against excessive peak current when multiple resistors are wired in parallel. The enclosure carries a protection rating of IP23, so it resists vertically falling water drops while remaining ventilated for air cooling. Power cables up to 6 mm² can be connected to the internal terminals, matching the permissible RMS current associated with the power and resistance values.
A sheet-steel housing surrounds the resistor grid and measures 395 mm wide, 490 mm deep, and 520 mm high, and it connects to the DC bus through an M10 terminal stud. The assembly weighs 26 kg, which adds thermal mass and works with a thermal time constant of 100 s to moderate temperature rise during repeated braking events. During operation, the ambient temperature around the unit must remain below 40 °C, while the ceramic elements may reach a surface temperature of 80 °C without damage. The ventilated design supports heat dissipation during repetitive stop cycles and allows the resistor module to operate within its stated thermal limits.
