RZW03.1-015-040
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The RZW03.1-015-040 is a braking resistor with a power rating of 15 kW and a resistance of 18 Ω at 40% operating factor. Designed by Bosch Rexroth Indramat as part of the RZW Braking Resistors series, it has a protection class of IP 23 and weighs approximately 15 kg. The resistor features galvanized steel housing and operates up to 80°C.
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Product Description:
Bosch Rexroth Indramat manufactured the RZW03.1-015-040. The RZW03.1-015-040 has a continuous power dissipation of 15 kW, which is directly related to its thermal management during regenerative braking. Large amounts of kinetic energy are converted into electrical energy by the motor, which acts as a generator in high-inertia systems or devices that need to decelerate quickly. To prevent overloading the DC bus or harming the power electronics, this electrical energy needs to be dissipated. The resistor’s ability to manage continuous energy flow and convert it into heat via Joule heating is shown by its 15 kW rating. Keeping the mechanical and electrical integrity of high-demand automation systems and downstream components depends heavily on the resistor’s performance during these high-energy transients. The resistor’s electrical specs are 18 ohms and 40% duty cycle. Ohm’s law (V = IR) governs the current that flows during braking, and the formula P = I²R shows how this resistance affects the immediate power dissipation. The 40% duty cycle spec is important as it defines the thermal limits of the device. It means the resistor can run at full power for 40% of a cycle period without exceeding its thermal design limits. If this limit is exceeded, continuous operation may result in heat saturation, insulation failure or material property degradation.
The component is suitable for controlled deceleration scenarios where thermal management is a design issue due to the interaction of resistance, voltage, current and duty cycle. Galvanized steel is used to encapsulate the RZW03.1-015-040 from a mechanical and materials engineering perspective. The zinc coating applied during galvanization gives this material excellent corrosion resistance in addition to its mechanical strength. This layer is important to prevent oxidative reactions and mechanical wear in industrial automation environments, especially those with high humidity, chemicals in the air or temperature swings. Steel’s stiffness also helps to keep the enclosure integrity by reducing mechanical vibrations and preventing deformation from external pressure or heat cycling. In high-duty applications its structural robustness ensures the resistor will retain its mechanical coupling and dimensional stability over extended use.
With an Ingress Protection rating of IP23, the device only provides limited protection against water spray at angles up to 60 degrees from vertical and against solid particles larger than 12.5 mm. This level of protection is sufficient for many regulated industrial environments where exposure to water jets or fine particles is not constant, even if it’s not waterproof or dust-tight. Also, the bulk of the resistor (around 15 kg) contributes to its thermal mass and mechanical inertia. Although the weight has no direct effect on its electrical function, it’s important for thermal buffering and mechanical mounting. The resistor is more robust during braking sequences as its thermal mass allows it to absorb transient energy spikes without instantaneously reaching critical temperatures.
Frequently Asked Questions about RZW03.1-015-040:
Q: What is the power rating of the RZW03.1-015-040 braking resistor?
A: The RZW03.1-015-040 braking resistor has a power rating of 15 kW, allowing it to effectively dissipate energy during braking operations. This high power rating ensures reliable performance in industrial automation applications that require substantial energy management.
Q: What is the protection class of the RZW03.1-015-040?
A: The protection class of the RZW03.1-015-040 is IP 23. This means the resistor is protected against splashing water and solid objects larger than 12mm, ensuring it remains operational in industrial environments where exposure to dust and moisture is possible.
Q: What material is the housing made from?
A: The housing of the RZW03.1-015-040 is made from galvanized steel. This durable material ensures the resistor can withstand demanding conditions, offering resistance to corrosion and physical damage, which is essential for long-lasting performance in industrial settings.
Q: What is the operating temperature range for the RZW03.1-015-040?
A: The RZW03.1-015-040 operates within a temperature range of 0 to 40°C. This operating temperature range ensures the resistor remains effective in a variety of environmental conditions while maintaining its performance and longevity.
Q: What is the weight of the RZW03.1-015-040 braking resistor?
A: The RZW03.1-015-040 weighs approximately 15 kg. This weight is an important consideration when planning for installation, ensuring that the mounting system can support the resistor securely in its intended operational environment.
