Air or water-cooled
Heavy-Duty Resistors from REO
Efficient cooling specifically for heavy duty applications
REO NTT resistors have been specifically developed, produced and certified for use in railway and heavy duty applications. Air or water-cooled REO resistors are used in all kinds of different functions in railway technology, such as damping resistors or charge and discharge resistors. These resistors are therefore subject to specific requirements owing to their area of application. Excellent functional safety and life cycles combined with extreme resistance against adverse environmental conditions are therefore essential properties. This specially developed winding technology enables higher dielectric strength owing to the fact the wires in use are separated from each other. Protection ratings up to IP 66 can be achieved thanks to the profile design. The modular design ensures higher performance thanks to the combination of several resistors. Liquid-cooled resistors from REO have outputs of up to 60 kW, which are significantly lower than traditional air-cooled resistors.
Benefits of resistors
- Excellent mechanical protection
- Quiet
- Air or water-cooled
- High functional safety and life cycle
- Protection ratings from IP00 to IP66
- Vibration and shock tested as per DIN EN 61373
- Can be combined
Performance spectrum of REO resistors
| Resistors, air-cooled* | |
|---|---|
| Type | NTT R 153, NTT R 159 |
| Continuous power | Up to 30 [KW] |
| Rated voltage | Up to 4.200 [V] |
| Protection rating | Up to IP66 |
| Resistors, water-cooled* | |
|---|---|
| Type | BW D 330, NTT RD 158 |
| Continuous power | Up to 60 [KW] |
| Rated voltage | Up to 4.200 [V] |
| Protection rating | IP20 – IP65 |
*Our expertise and experience make us the ideal partner for developing custom solutions for your business
Resistor selection
REOhm charging resistor NTT R 153
REOhm damping resistor NTT R 159
REOhm damping resistor NTT RD 158
REOhm braking resistor BW D 330
Comparison of surface temperature, air-cooled vs. water-cooled
Heavy Duty Catalog
Particularly resilient REO components at a glance
With the new Heavy-Duty catalog, you have for the first time all REO components that meet the highest requirements, clearly arranged and modern at a glance. These include chokes, transformers, resistors, current transformers and complete solutions. In the case of complete solutions, the main focus is on the highly compatible support frame system, the REOFLEX Multiuse Frame. Thanks to the standardized support frame, rail components from REO can be mounted easily, quickly and very variably. For safe damping and suspension, vibration dampers can even be integrated into the unit as required.
Individual development
Customized product development
Individual product development at REO means achieving and maintaining parameters tailored to the customer’s needs, which would not be possible with standard products. Both the electrical parameters and the mechanical, constructive conditions are adapted. Thus, the customer receives exactly the product he needs for his application.
REO is not only a mass producer, but is particularly at home in the development and production of special niche solutions. In close cooperation with our customers, we develop ideas and technical solutions in small or large quantities, which, through their use in an overall system, take over tasks that are not covered by standard products on the market. In this way, we enable our customers to use state-of-the-art applications and innovative production processes without having to resort to standard products with limitations.
