RZW03.1-030-040 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW03.1-030-040 is a braking resistor from the RZW Braking Resistors series with a power rating of 30 kW and a resistance of 10 Ohms. It features IP23 protection, a 40 percent operating factor, and has dimensions of 795 mm width, 490 mm depth, and 520 mm height. The unit weighs 51 kilograms and has a load cycle of 120 seconds.
Internal Product Review
The RZW03.1-030-040 is a Bosch Rexroth Indramat RZW braking resistor rated for 30 kW with 10 Ω resistance. IP23 protection and a 40% SD operating factor make the resistor a well-balanced choice for controlled braking duty in industrial drive systems.
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Product Description:
The RZW03.1-030-040 braking resistor is manufactured by Bosch Rexroth Indramat for the RZW Braking Resistors series. In a drive system, it handles surplus kinetic energy returned by decelerating motors. It converts that energy into heat, protecting inverters and maintaining DC-bus voltage stability during industrial automation cycles.
This model can absorb up to 30 kW of regenerative power, and its fixed resistance of 10 Ω controls the peak current at the rated DC-link voltage. An operating factor of 40% SD is paired with a load cycle of 120 seconds, allowing the element to remain energized for up to 48 seconds during each cycle. The remaining 72 seconds provide the required cooling interval before the next braking event. The permissible conductor cross section is 16 mm², so connected cables must accommodate this size to prevent overheating. The unit has design code 1, resistor type F3, and a minimum connectable resistance of 8.75 ohms, allowing multiple units to share the dissipation load in a suitable array. M10 terminal studs provide secure bolted connections with low contact resistance.
The enclosure has an ingress protection rating of IP23, making it suitable for indoor installation where falling water does not strike the enclosure at angles greater than 60 degrees from vertical. A thermal time constant of 100 seconds indicates how quickly the resistor element responds to temperature changes during repetitive operation. The assembly weighs 51 kg, which requires a mounting surface capable of supporting the installed load. Its enclosure measures 795 mm wide, 490 mm deep, and 520 mm high. These dimensions must be considered when selecting cabinet space and maintaining adequate clearance around the resistor. Proper spacing also allows heat to leave the enclosure during the cooling portion of each operating cycle.
