RZW02.1-055-006 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-055-006 is a braking resistor from the RZW Braking Resistors series. It features a 55 kW power rating, 6.1 Ohms resistance, and supports a peak to continuous ratio of 8. With an IP20 protection class and a weight of 13 kilograms, it measures 490 mm in width, 400 mm in depth, and 270 mm in height.
Internal Product Review
The RZW02.1-055-006 is a Bosch Rexroth Indramat RZW braking resistor rated for 55 kW with 6.1 Ω resistance. IP20 protection and a 100 s thermal time constant make the resistor a strong choice for stable braking performance in controlled industrial installations.
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Product Description:
The RZW02.1-055-006 braking resistor is produced by Bosch Rexroth Indramat within the RZW Braking Resistors series. As a power-dissipation module, it connects to drive controllers that regenerate energy during deceleration and converts that energy into heat, preventing DC-bus overvoltage in industrial automation axes. Electrical safety is supported by the enclosure’s IP20 rating, which provides protection against finger contact while permitting air to circulate for convection cooling.
The resistor can dissipate up to 55 kW during the permitted duty window, and its nominal resistance is 6.1 Ω. This resistance limits discharge current while matching converters that accept a minimum resistance of 5 Ω. Peak power may be applied for up to 7.2 s per cycle with an operating factor of 6% SD, so the resistor must remain inactive during the rest of the cycle to prevent thermal overload. The housing is 490 mm wide, 270 mm high, and 400 mm deep, providing the dimensions needed to plan cabinet clearance. An M10 grounding thread provides a secure electrical bond to the machine frame. The design 1, line 2 configuration uses the mounting hole pattern and connector orientation associated with this series.
The resistor has a peak-to-continuous power ratio of 8, allowing it to withstand eight times its continuous load for the permitted activation period. After operating at peak power for the specified duration, the resistor requires a cooling pause of 112.8 s before the next cycle. Its thermal time constant is 100 s, representing the time required for the body temperature to complete approximately 63% of its total response after a step change in operating conditions. This value can be used when planning external airflow and spacing between multiple resistors. The assembly weighs 13 kg, which must be considered when selecting the cabinet panel and mounting hardware. Its thermal mass also moderates rapid temperature changes during repeated braking cycles.
