RZW02.1-160-015
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The RZW02.1-160-015 braking resistor delivers a peak power of 144 kW, a minimum connectable resistance of 2.2 ohms, and features a thermal time constant of 100 seconds. As part of the RZW Braking Resistors series by Bosch Rexroth Indramat, it offers IP20 or IP23 protection and supports operating factors of 40% and 60% SD.
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Product Description:
Bosch Rexroth Indramat manufactured the RZW02.1-160-015. The maximum power of the RZW02.1-160-015 brake resistor can convert into heat instantly while braking is 144 kW, that’s its peak power dissipation capability. This becomes a deciding factor for system performance and protection in high-inertia industrial systems where quick deceleration is required. The drive converts the motor’s kinetic energy into electrical energy when braking, which is then fed into the brake resistor. To prevent overvoltage or hardware degradation, the resistor must be able to handle such peak loads without going over thermal or electrical limits. The resistor is designed for applications that require frequent and strong braking cycles, as seen by its 144 kW peak rating. Its minimum connectable resistance of 2.2 ohms is one of its electrical features. According to Ohm’s law, this parameter sets the lowest allowed resistance value for the drive, which directly affects the current.
A lower resistance allows more current for a given brake voltage and accelerates the energy dissipation as heat. The 2.2-ohm threshold is a critical boundary condition in thermal and electrical design but also results in higher thermal loads. A time constant of 100 seconds defines the RZW02.1-160-015’s thermal dynamics. The time it takes for the resistor’s temperature to rise to 63.2% of its ultimate value during heating or drop to 36.8% during cooling is shown by this value, which is based on transient heat transfer analysis. This time constant means the resistor dissipates accumulated heat slowly, even if it can handle high-power input for short periods. The resistor’s usefulness for cyclic braking applications where energy is absorbed within a short time frame is greatly influenced by this feature. Overheating can occur if the energy input exceeds the dissipation rate.
The RZW02.1-160-015 has a steel housing that improves thermal and mechanical performance. The internal components of the resistor are shielded from shock, vibration and mechanical wear – all common in industrial environments – by the strength of the steel. Steel’s moderate thermal conductivity helps with passive heat dissipation by directing heat away from the resistive core and into the surrounding environment, in addition to its mechanical robustness. Even in humid or dusty environments, the protection rating ensures operational reliability by offering different levels of protection against solid particles and water spray. The resistor has a 40% and 60% duty cycle rating at 4.8 ohm resistance, meaning it can dissipate energy in a controlled manner for certain application profiles.
Frequently Asked Questions about RZW02.1-160-015:
Q: What is the peak power rating of the RZW02.1-160-015 braking resistor?
A: The RZW02.1-160-015 braking resistor delivers a peak power rating of 144 kW. This high power capability allows it to effectively handle braking energy in demanding industrial automation applications.
Q: What is the minimum connectable resistance for this braking resistor?
A: The minimum connectable resistance for the RZW02.1-160-015 is 2.2 ohms. This allows it to be integrated into various systems, providing the necessary resistance for efficient braking functionality.
Q: What is the thermal time constant of the RZW02.1-160-015 braking resistor?
A: The thermal time constant of the RZW02.1-160-015 is 100 seconds. This value indicates how quickly the resistor can dissipate heat and cool down after operating under load, which is critical for maintaining performance in high-power applications.
Q: What protection class does the RZW02.1-160-015 braking resistor offer?
A: The RZW02.1-160-015 braking resistor offers an IP20 or IP23 protection class, depending on the configuration. These ratings ensure the unit is protected from solid objects and water, making it suitable for different industrial environments.
Q: What operating factors are supported by the RZW02.1-160-015?
A: The RZW02.1-160-015 supports operating factors of 40% and 60% SD, with a corresponding resistance of 4.8 ohms for each. This allows it to operate under varying load conditions and provides flexibility for different applications.
