RZW02.1-018-025
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MPN: R911200028
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The RZW02.1-018-025 braking resistor boasts a power rating of 18.5 kW, a resistance of 47 ohms, a thermal time constant of 150 seconds, and a weight of 15 kilograms. Part of the RZW Braking Resistors from Bosch Rexroth Indramat, it is housed in galvanized steel and provides IP23 protection.
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Product Description:
The RZW02.1-018-025 RZW Braking Resistor is manufactured by Bosch Rexroth Indramat, specifically for dynamic braking in frequency converter-based industrial automation systems. This braking resistor provides stable, efficient, and secure energy dissipation when motors decelerate. This braking resistor is equipped with a rated resistance of 18 Ω, and the minimum connectable resistance is 17.5 Ω to allow compatible and safe integration with various drive systems.
The RZW02.1-018-025 braking resistor supports an 18.5 kW frequency converter power rating, which makes it the best choice for medium-duty motor control applications that require controlled deceleration and effective energy dissipation. This braking resistor’s maximum power capability of 13.5 kW allows it to handle sudden braking operations without thermal failure and provide stable performance under short, high-load bursts. Having a cross-sectional conductor area of 6 mm², this braking resistor facilitates high current conduction with less conductor heat to enhance electrical safety and efficiency. The thermal time constant of 100.0 seconds ensures stability under long-term operation by reducing the risk of thermal overrun when subjected to repeated braking cycles. The RZW02.1-018-025 resistor weighs just 13 kg and provides easy handling during assembly.
This braking resistor has a protection rating of IP 20 and is designed for indoor control cabinets or protected areas. The dimensions for this resistor are 490 mm in length, 400 mm in width, and 270 mm in height, thereby offering a compact installation form factor for panels. This braking resistor normally operates at the ambient temperature range of 0 to 40 °C, which is appropriate for standard factory environments. This braking resistor also endures a relative humidity with a maximum of 90% non-condensing and allows installation in wider industrial climates without any moisture damage.
Frequently Asked Questions about RZW02.1-018-025:
Q: How does the 100-second thermal time constant benefit the system?
A: It allows gradual heat dissipation during frequent braking. This reduces the risk of thermal damage over extended use.
Q: Why is a 6 mm² cross-section used in the RZW02.1-018-025?
A: It supports higher current flow with lower resistance. This improves overall electrical performance and reduces heat buildup.
Q: How does the 13.5 kW peak power capacity help in emergency stops?
A: It handles energy surges during sudden deceleration. This prevents strain on the frequency converter and motor system.
Q: What role does the IP 20 rating play in installation?
A: It prevents solid objects over 12 mm from entering. This makes the RZW02.1-018-025 safe for enclosed electrical cabinets.
Q: Why is a minimum connectable resistance of 17.5 Ω specified?
A: It ensures proper load matching with the drive. This helps maintain safe current levels during braking cycles.
