RZW02.1-015-015 Bosch Rexroth Indramat
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MPN: R911201280
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The Bosch Rexroth Indramat RZW02.1-015-015 is part of the RZW Braking Resistors series and offers a power rating of 15 kW with a resistance of 19 Ohms. This resistor has a protection class of IP20, supports a maximum on-time of 18 seconds and an operating factor of 15 percent SD. It measures 490 mm wide, 300 mm deep, 270 mm high, and weighs 9.5 kilograms.
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Product Description:
The RZW02.1-015-015 braking resistor is produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. In an automation cell, it pairs with servo drives or frequency inverters, diverting regenerated energy from the DC link and converting it into heat so that overvoltage trips are avoided during fast stops or direction changes. The assembly follows Design 1 and Line 2 and fits into control cabinets with a width of 490 mm, a depth of 300 mm, and a height of 270 mm.
The resistor’s continuous energy-handling capacity is rated at 15 kW, indicating the thermal load it can dissipate during its specified duty cycle. A fixed resistance of 19 Ω determines the braking current that flows at a given bus voltage and must be matched to the drive limits, while a minimum resistance of 17.5 Ω prevents excessive current as the elements warm up. The operating factor is limited to 15% SD, meaning the device may be energized for only part of each 120-second load cycle to keep its surface temperature within safe limits. During that cycle, the maximum permissible energization period is 18 s, followed by a mandatory cooling period of 102 s to restore thermal equilibrium.
The thermal time constant of 100 s indicates how quickly the resistor’s core temperature rises or falls, which helps with calculating peak element temperatures during repetitive braking events. Its enclosure has an IP20 protection class, which guards against finger contact but does not provide dust-tight sealing or protection from water. Installation inside a suitable control cabinet protects the unit from contaminants and accidental contact while allowing generated heat to escape. The installation mass is 9.5 kg, which must be considered when preparing the mounting panel for vertical installation. Adequate clearance around the enclosure helps prevent hot exhaust air from recirculating within the cabinet and reduces heat exposure to nearby components.
