RZW03.1-030-060 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW03.1-030-060 is part of the RZW Braking Resistors series and weighs 61 kilograms. This resistor has a power rating of 30 kW, a resistance of 11 ohms, and supports a line cross-section of 25 mm². It offers IP23 protection, operates within a temperature range of 0 to 40 °C, and measures 995 mm wide, 520 mm high, and 490 mm deep.
Internal Product Review
The RZW03.1-030-060 is a Bosch Rexroth Indramat RZW braking resistor engineered for dependable dynamic braking at 30 kW with 11 Ω resistance. IP23 protection and a 60% operating factor support stable service in demanding industrial installations. A 100 s thermal time constant is a strong advantage for controlled energy dissipation.
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Product Description:
The RZW03.1-030-060 braking resistor is produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. In an automation line, it connects to an inverter’s DC bus and converts surplus regenerative energy into heat so drive modules can maintain controlled deceleration without overvoltage faults. Its Design 1 enclosure has a width of 995 mm, a depth of 490 mm, and a height of 520 mm, allowing the unit to be mounted beside cabinet walls. The 25 mm² conductor cross-section simplifies connection to high-current supply wiring. An ambient operating range of 0 °C to 40 °C suits most enclosed machine halls.
The resistor can absorb up to 30 kW of electrical power, which is the maximum continuous thermal load during the permitted duty period. Its element has a resistance of 11 Ω, allowing the braking chopper to receive the correct current rise without overstressing DC-bus components. The operating factor of 60% SD indicates that the resistor may conduct for three-fifths of each complete cycle, controlling its average temperature. When energized, the external fins may reach 80 °C, so adequate spacing and guarding are required to protect nearby cables. A thermal time constant of 100 s indicates the delay between power application and a 63% rise toward the steady-state temperature, supporting drive algorithms that predict resistor heating during repetitive stops.
The IP23 housing blocks access by fingers and protects against falling water spray while permitting airflow for convection cooling. During braking events, the resistor may remain energized for 72 s before it must cool. The required recovery period is 48 s, which aligns with the stated duty factor and prevents the insulation temperature from exceeding its limit. At 61 kg, the assembly requires a firm panel or floor shelf for secure support. Its minimum connectable resistance is 8.75 Ω, allowing additional units to be connected in parallel when greater energy dissipation is required.
