RZW03.1-015-015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW03.1-015-015 is a braking resistor from the RZW Braking Resistors series. This device has a resistance of 19 ohms and a maximum power rating of 15 kW, with a protection class of IP23 and a thermal time constant of 100 seconds. It measures 520 mm in height, 395 mm in width, 490 mm in depth, and weighs 26 kilograms.
Internal Product Review
The RZW03.1-015-015 is a Bosch Rexroth Indramat RZW braking resistor designed for dependable dynamic braking service. A 15 kW power rating combined with 19 Ω resistance supports stable energy dissipation in demanding drive systems. IP23 protection and a 15% operating factor make this unit a strong choice for controlled industrial braking applications.
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Product Description:
The RZW03.1-015-015 is a braking resistor module produced by Bosch Rexroth Indramat within the RZW Braking Resistors series. During regenerative motion cycles, the unit converts surplus kinetic energy from connected drive controllers into heat, preventing DC-bus overvoltage and enabling rapid deceleration of servo axes or spindle drives. Its housing measures 520 mm in height, 395 mm in width, and 490 mm in depth. These dimensions allow it to be mounted inside standard control cabinets beside frequency inverters and servo drives used in automated machinery.
The resistor is rated for 15 kW of continuous thermal dissipation, a power level matched to medium-frame drive packages that return energy to the DC link. Its nominal resistance of 19 Ω establishes the current that will flow at a given DC-bus voltage, which the control system uses when sizing fuses and cabling. During a braking event, the element may be energized for up to 18 s in every load sequence. A mandatory recovery interval of 102 s must then follow, resulting in a complete load cycle of 120 seconds. The operating factor of 15% SD indicates the allowable average thermal loading over that cycle and helps keep surface temperatures within safe limits for adjacent electronics.
The steel enclosure and ceramic elements have a combined mass of 26 kg, which contributes to the resistor’s heat-storage capacity. Stored energy is released according to a thermal time constant of 100 s, so cabinet airflow must sustain convection for several minutes after braking ends. The enclosure has an IP23 protection rating, shielding live parts from fingers and falling water drops while requiring indoor installation away from directed sprays. Power conductors with cross-sectional areas up to 4 mm² can be connected to the terminals. The minimum connectable resistance is 17.5 Ω, which permits suitable parallel arrangements when connected drives require greater dissipation without exceeding current limits.
