Resistor for resistive loads and dynamic braking: applications of the RDP 5000
The Fairfild RDP 5000 is a resistor from the RDP family suitable for applications with high energy loads and heavy overloads.
It is used in the industrial automation and energy sectors, particularly as a dynamic braking resistor, as a capacitor charging and discharging resistor in RC circuits, and as a basic element for resistive loads.
Its use is therefore suited to contexts in which the resistive component must withstand demanding application conditions, while maintaining construction characteristics consistent with the RDP family.
What is the RDP 5000
The RDP 5000 is a resistor with stainless steel terminals for M6 screws and a highly resistant construction. It is designed for applications characterized by high energy loads and heavy overloads.
The structure is wire-wound on ceramic brackets mounted on a metal support. This configuration allows for very low thermal resistance, because the wire is free to exchange heat efficiently with the surrounding air.
The construction of the RDP also allows group assembly, a useful feature when the application requires multiple resistors integrated into the same system.
Applications of the RDP 5000
The main applications of the RDP 5000 are three: dynamic braking, capacitor charging and discharging in RC circuits, and resistive loads.
In dynamic braking, the RDP 5000 is among the resistors that can be used when the application requires a product family suitable for high energy loads and heavy overloads.
In RC circuits, it can be used as a capacitor charging and discharging resistor. In resistive loads, instead, it is used as a basic element, maintaining the connection with the energy and industrial applications of the RDP family.
Application sectors
The main application sectors of the RDP 5000 are industrial automation and the energy sector.
In these areas, the resistor is associated with applications involving dynamic braking, capacitor charging/discharging in RC circuits, and resistive loads. The choice of product must therefore be linked both to the sector of use and to the specific required application.
This approach makes it possible to view the RDP 5000 not as an isolated component, but as part of a family intended for defined technical uses.
Essential technical characteristics
The RDP 5000 has a continuous rated power of 5000 W, a minimum resistance of 6.3 Ω, a maximum resistance of 300 Ω, tolerance ±5%, IP00 protection rating, and a rated insulation voltage of 2000 V.
The RDP family includes 7 models, with rated powers from 1200 W up to 6500 W and an ohmic value range between 1.8 Ω and 300 Ω. The maximum operating voltage indicated for the family is 2000 V.
These data make it possible to place the RDP 5000 within the RDP range and compare it with the other models of the same family according to the required rated power and ohmic value.
Overload and temperature
The resistor can be overloaded with respect to its rated power depending on the duty cycle, that is, according to the on-time and the rest time.
For pulses lasting less than one second, the permitted overload also depends on the ohmic value. The temperature of the resistor depends on the power it must dissipate and on the ohmic value.
These aspects are particularly relevant in applications where the resistor is subjected to variable operating conditions or short-duration pulses.
Group installation
The RDP is normally assembled in groups using tie rods and ceramic spacer bushings or support bars.
The diamond-shaped form makes the RDP suitable for ventilation, while the stainless steel terminals are suitable for connection via cable lugs.
In the case of group installation, Fairfild recommends maintaining a distance of at least 30 mm between the resistors. This data is important when multiple elements are installed within the same configuration.
The Fairfild RDP 5000 belongs to the RDP family and is suitable for applications in the industrial automation and energy sectors.
Its intended uses connect it to dynamic braking, capacitor charging/discharging in RC circuits, and resistive loads, making it a solution to be evaluated when the application requires a resistor suitable for high energy loads and heavy overloads.
